# List of King of Mask Singer episodes (2021)

This is a list of episodes of the South Korean variety-music show King of Mask Singer in 2021. The show airs on MBC as part of their Sunday Night lineup. Due to the COVID-19 pandemic, the show would be recorded without any audience in the episodes, and the matches' results would be decided by the celebrity panelists. The names listed below are in performance order.
    – Contestant is instantly eliminated by the live audience and judging panel
    – After being eliminated, contestant performs a prepared song for the next round and takes off their mask during the instrumental break
    – After being eliminated and revealing their identity, contestant has another special performance.
    – Contestant advances to the next round.
    – Contestant becomes the challenger.
    – Mask King.

## Episodes
### 144th Generation Mask King (cont.)

* Contestants: Elly (Weki Meki), Jeong Minseong (La Poem), Chan (Victon), Outsider, Nam Hyun-hee, Shin Hyun-woo (Sohodae [ko]), Park Nam-jung [ko], Jung Dong-nam [ko]
Episode 288 was broadcast on January 3, 2021.
| Order | Stage Name | Real Name | Song | Original artist | Vote |
| Round 2 ||||||
| Pair 1 | 2021 Cheer Up, Ox! | Jeong Minseong of La Poem | Memory Loss (기억상실) | Gummy | 11 |
| Pair 1 | Miracles in December | Chan of Victon | Try (노력) | Park Won [ko] | 10 |
| Pair 2 | Countdown | Shin Hyun-woo of Sohodae | To You (그대에게) | Infinite Track [ko] | 3 |
| Pair 2 | The Twelfth Brother | Park Nam-jung | I Loved You (사랑했어요) | Kim Hyun-sik | 18 |
| Special | Countdown | Shin Hyun-woo of Sohodae | Irreversible Love (돌이킬 수 없는 사랑) | Sohodae [ko] | — |
| Round 3 ||||||
| Finalists | 2021 Cheer Up, Ox! | Jeong Minseong of La Poem | Old Song (오래된 노래) | Kim Dong-ryul | 15 |
| Finalists | The Twelfth Brother | Park Nam-jung | D.D.D (디.디.디.) | Kim Hye-rim [ko] | 6 |
| Special | Twelve Zodiac Signs | Park Nam-jung | Missing You (널 그리며), Emergency Landing of Love (사랑의 불시착), Days with Rain (비에스친 날들) | Park Nam-jung [ko] | — |
| Final ||||||
| Battle | 2021 Cheer Up, Ox! | Jung Min-sung of La Poem | Previous three songs used as voting standard | Previous three songs used as voting standard | 5 |
| Battle | Buttumak Cat | Yang Yo-seob of Highlight | Forever and Ever (영원히 영원히) | Jaurim | 16 |

### 145th Generation Mask King

* Contestants: Yoo Seung-beom [ko], Yoon Taek [ko], Lee Jin-ho [ko], Jae-gyun Hwang, Wuno, Yubin, Lee Young-hyun [ko] (Big Mama), Suyun (singer) [ko] (Rocket Punch)

#### Episode 289

Episode 289 was broadcast on January 10, 2021. This marks the beginning of the Hundred-forty-fifth Generation.
| Order | Stage Name | Real Name | Song | Original artist | Vote |
| Round 1 ||||||
| Pair 1 | The Nature Man | Yoo Seung-beom | Once Again This Night (이 밤을 다시 한 번) | Jo Ha-moon [ko] | 14 |
| Pair 1 | The City Man | Yoon Taek | Once Again This Night (이 밤을 다시 한 번) | Jo Ha-moon [ko] | 7 |
| 2nd Song | The City Man | Yoon Taek | Cheap Coffee (싸구려 커피) | Chang Kiha | — |
| Pair 2 | Won Bin | Lee Jin-ho | Memories Resemble Love (추억은 사랑을 닮아) | Park Hyo-shin | 11 |
| Pair 2 | Mr. Bean | Jae-gyun Hwang | Memories Resemble Love (추억은 사랑을 닮아) | Park Hyo-shin | 10 |
| 2nd Song | Mr. Bean | Jae-gyun Hwang | Around Thirty (서른 즈음에) | Kim Kwang-seok | — |
| Pair 3 | Winter Rain | ₩uNo | Phone Number (전화번호) | Jinusean | 6 |
| Pair 3 | The Flower of Snow | Yubin | Phone Number (전화번호) | Jinusean | 15 |
| 2nd Song | Winter Rain | ₩uNo | ? (Question Mark) (? (물음표)) | Primary ft. Choiza ft. Zion.T | — |
| Pair 4 | Treasure Chest | Lee Young-hyun of Big Mama | With a Heart that Should Forget (잊어야 한다는 마음으로) | Kim Kwang-seok | 17 |
| Pair 4 | Jukebox | Suyun of Rocket Punch | With a Heart that Should Forget (잊어야 한다는 마음으로) | Kim Kwang-seok | 4 |
| 2nd Song | Jukebox | Suyun of Rocket Punch | Playing with Fire (불장난) | Blackpink | — |

#### Episode 290

Episode 290 was broadcast on January 17, 2021.
| Order | Stage Name | Real Name | Song | Original artist | Vote |
| Round 2 ||||||
| Pair 1 | The Nature Man | Yoo Seung-beom | It is Love (사랑이야) | Song Chang-sik | 17 |
| Pair 1 | Won Bin | Lee Jin-ho | Don't You Know? (모르시나요) | Davichi | 4 |
| Pair 2 | The Flower of Snow | Yubin | Move | Taemin | 3 |
| Pair 2 | Treasure Chest | Lee Young-hyun of Big Mama | A Night Like Tonight (오늘 같은 밤이면) | Park Jeong-woon [ko] | 18 |
| Round 3 ||||||
| Finalists | The Nature Man | Yoo Seung-beom | Yeongil Bay's Friend (영일만 친구) | Choi Baek-ho [ko] | 3 |
| Finalists | Treasure Chest | Lee Young-hyun of Big Mama | My Way | Lee Soo | 18 |
| Special | The Nature Man | Yoo Seung-beom | Jealousy (질투) | Yoo Seung-beom | — |
| Final ||||||
| Battle | Treasure Chest | Lee Young-hyun of Big Mama | Previous three songs used as voting standard | Previous three songs used as voting standard | 15 |
| Battle | Buttumak Cat | Yang Yo-seob of Highlight | The First Snow (첫 눈) | Jung Joon-il [ko] | 6 |

### 146th Generation Mask King

* Contestants: Park Si-hwan, Go Young-yeol [ko] (Second Moon/RabidAnce), Jaejae, Lee Ae-ran [ko], Park Seon-woo [ko], Son Ah-seop, Yves (singer) (Loona), Kim Ki-bum

#### Episode 291

Episode 291 was broadcast on January 24, 2021. This marks the beginning of the Hundred-forty-sixth Generation.
| Order | Stage Name | Real Name | Song | Original artist | Vote |
| Round 1 ||||||
| Pair 1 | Staying Home | Park Si-hwan | Stained (물들어) | BMK | 17 |
| Pair 1 | Bangkok | Go Young-yeol of Second Moon/RabidAnce | Stained (물들어) | BMK | 4 |
| 2nd Song | Bangkok | Go Young-yeol of Second Moon/RabidAnce | Tiger is Coming (범 내려온다) | LeeNalChi [ko] | — |
| Pair 2 | Menbosha | Jaejae | A Cheeky Man (얄미운 사람) | Kim Ji-ae [ko] | 4 |
| Pair 2 | Sha Sha Sha | Lee Ae-ran | A Cheeky Man (얄미운 사람) | Kim Ji-ae [ko] | 17 |
| 2nd Song | Menbosha | Jaejae | Heartbreaker | G-Dragon | — |
| Pair 3 | Frozen | Park Seon-woo | Thorn (가시) | Buzz | 20 |
| Pair 3 | DDaeng | Son Ah-seop | Thorn (가시) | Buzz | 1 |
| 2nd Song | DDaeng | Son Ah-seop | One Love (하나의 사랑) | Park Sang-min | — |
| Pair 4 | Yuja Tea | Yves of Loona | Departure from a Country (출국) | Hareem [ko] | 17 |
| Pair 4 | Balocha | Kim Ki-bum | Departure from a Country (출국) | Hareem [ko] | 4 |
| 2nd Song | Balocha | Kim Ki-bum | Bravo My Life | Bom Yeoreum Gaeul Kyeoul | — |

#### Episode 292

Episode 292 was broadcast on January 31, 2021.
| Order | Stage Name | Real Name | Song | Original artist | Vote |
| Round 2 ||||||
| Pair 1 | Staying Home | Park Si-hwan | Invisible Love (보이지 않는 사랑) | Shin Seung-hun | 16 |
| Pair 1 | Sha Sha Sha | Lee Ae-ran | Daejeon Blues (대전 부르스) | Ahn Jeong-ae | 5 |
| Special | Sha Sha Sha | Lee Ae-ran | Life of a Century (백세인생) | Lee Ae-ran | — |
| Pair 2 | Frozen | Park Seon-woo | In the Rain (빗속에서) | Lee Moon-sae | 16 |
| Pair 2 | Yuja Tea | Yves of Loona | Tomorrow (내일 할 일) | Yoon Jong-shin | 5 |
| Round 3 ||||||
| Finalists | Staying Home | Park Si-hwan | You to Me Again (그대 내게 다시) | Byun Jin-sub | 18 |
| Finalists | Frozen | Park Seon-woo | Addicted Love (중독된 사랑) | Jo Jang-hyuk [ko] | 3 |
| Final ||||||
| Battle | Staying Home | Park Si-hwan | Previous three songs used as voting standard | Previous three songs used as voting standard | 12 |
| Battle | Treasure Chest | Lee Young-hyun of Big Mama | Secret (비밀) | Boohwal | 9 |

### 147th Generation Mask King

* Contestants: Han Hee-jun, Kim Na-young, Lee Eun-gyeol, Kim Shin-eui [ko] (Monni), Kim Yong-im [ko], Ahn Sung-joon (trot singer) [ko], Lee Joo-hyuk (singer) [ko] (Gift [ko]), Punch

#### Episode 293

Episode 293 was broadcast on February 7, 2021. This marks the beginning of the Hundred-forty-seventh Generation.
| Order | Stage Name | Real Name | Song | Original artist | Vote |
| Round 1 ||||||
| Pair 1 | Brother | Han Hee-jun | It's Gonna Be Rolling | Lee So-ra | 6 |
| Pair 1 | Brother's Wife | Kim Na-young | It's Gonna Be Rolling | Lee So-ra | 15 |
| 2nd Song | Brother | Han Hee-jun | Hug Me (안아줘) | Jung Joon-il [ko] | — |
| Pair 2 | Postcard | Lee Eun-gyeol | People All Change (사람들은 모두 변하나 봐) | Bom Yeoreum Gaeul Kyeoul | 2 |
| Pair 2 | Yeopjeon | Kim Shin-eui of Monni | People All Change (사람들은 모두 변하나 봐) | Bom Yeoreum Gaeul Kyeoul | 19 |
| 2nd Song | Postcard | Lee Eun-gyeol | Start Over (시작) | Gaho | — |
| Pair 3 | Phrase Plate | Kim Yong-im | Where Are You (당신은 어디 있나요) | Yang Soo-kyung [ko] | 13 |
| Pair 3 | Go Big or Go Home | Ahn Sung-joon | Where Are You (당신은 어디 있나요) | Yang Soo-kyung [ko] | 8 |
| 2nd Song | Go Big or Go Home | Ahn Sung-joon | It's Art (예술이야) | Psy | — |
| Pair 4 | Barcode | Lee Joo-hyuk of Gift | Going Home | Kim Yoon-ah | 14 |
| Pair 4 | QR Code | Punch | Going Home | Kim Yoon-ah | 7 |
| 2nd Song | QR Code | Punch | Beautiful Goodbye (사월이 지나면 우리 헤어져요) | Chen | — |

#### Episode 294

Episode 294 was broadcast on February 14, 2021.
| Order | Stage Name | Real Name | Song | Original artist | Vote |
| Round 2 ||||||
| Pair 1 | Brother's Wife | Kim Na-young | Break Away | Big Mama | 8 |
| Pair 1 | Yeopjeon | Kim Shin-eui of Monni | Stay | Nell | 13 |
| Pair 2 | Phrase Plate | Kim Yong-im | Loveletter (여정) | Wax | 6 |
| Pair 2 | Barcode | Lee Joo-hyuk of Gift | Do You Want to Walk with Me (같이 걸을까) | Lee Juck | 15 |
| Round 3 ||||||
| Finalists | Yeopjeon | Kim Shin-eui of Monni | After a Breakup (널 보낸 후에) | Choi Jae-hoon [ko] | 10 |
| Finalists | Barcode | Lee Joo-hyuk of Gift | I Want to Fall in Love (사랑에 빠지고 싶다) | Johan Kim | 11 |
| Final ||||||
| Battle | Barcode | Lee Joo-hyuk of Gift | Previous three songs used as voting standard | Previous three songs used as voting standard | 19 |
| Battle | Staying Home | Park Si-hwan | 12:30 (12시 30분) | Beast | 2 |

### 148th Generation Mask King

* Contestants: Song Joon-geun [ko], Jiseon (singer) [ko] (Loveholics), Taeil (Block B), Shinsadong Tiger, Minnie ((G)I-dle), Nadeul (singer) [ko] (Weather Forecast [ko]), New (South Korean singer) [ko] (The Boyz), Na Yoon-kwon [ko]

#### Episode 295

Episode 295 was broadcast on February 21, 2021. This marks the beginning of the Hundred-forty-eighth Generation.
| Order | Stage Name | Real Name | Song | Original artist | Vote |
| Round 1 ||||||
| Pair 1 | A-type Man | Song Joon-geun | My Heart Will Be with You (너를 향한 마음) | Lee Seung-hwan | 4 |
| Pair 1 | B-type Woman | Jiseon of Loveholics | My Heart Will Be with You (너를 향한 마음) | Lee Seung-hwan | 17 |
| 2nd Song | A-type Man | Song Joon-geun | Applause (갈채) | Choi Yong-joon [ko] | — |
| Pair 2 | Penthouse | Taeil of Block B | Fiction | Beast | 17 |
| Pair 2 | Vinyl House | Shinsadong Tiger | Fiction | Beast | 4 |
| 2nd Song | Vinyl House | Shinsadong Tiger | Goodbye for a Moment (잠시만 안녕) | MC the Max | — |
| Pair 3 | Blood Cockles | Minnie of (G)I-dle | Snow (눈) | Zion.T | 15 |
| Pair 3 | Clam Manila | Nadeul of Weather Forecast | Snow (눈) | Zion.T | 6 |
| 2nd Song | Clam Manila | Nadeul of Weather Forecast | Oh! What a Shiny Night (밤이 깊었네) | Crying Nut | — |
| Special | Clam Manila | Nadeul of Weather Forecast | I Like You (좋아 좋아) | Weather Forecast [ko] | — |
| Pair 4 | Snowman | New of The Boyz | Doll (인형) | Lee Ji-hoon | 6 |
| Pair 4 | Snowflake | Na Yoon-kwon | Doll (인형) | Lee Ji-hoon | 15 |
| 2nd Song | Snowman | New of The Boyz | Eraser (지우개) | Ali | — |

#### Episode 296

Episode 296 was broadcast on February 28, 2021.
| Order | Stage Name | Real Name | Song | Original artist | Vote |
| Round 2 ||||||
| Pair 1 | B-type Woman | Jiseon of Loveholics | If (만약에) | Taeyeon | 9 |
| Pair 1 | Penthouse | Taeil of Block B | Hui Jae (희재) | Sung Si-kyung | 12 |
| Special | B-type Woman | Jiseon of Loveholics | Doll's Dream (인형의 꿈) & Loveholic | Loveholics | — |
| Pair 2 | Blood Cockles | Minnie of (G)I-dle | D (Half Moon) | Dean | 5 |
| Pair 2 | Snowflake | Na Yoon-kwon | The Fool (이 바보야) | Jung Seung-hwan | 16 |
| Round 3 ||||||
| Finalists | Penthouse | Taeil of Block B | Flower Way (꽃길) | Kim Se-jeong | 3 |
| Finalists | Snowflake | Na Yoon-kwon | Alone in Love (혼자만의 사랑) | Kim Gun-mo | 18 |
| Final ||||||
| Battle | Snowflake | Na Yoon-kwon | Previous three songs used as voting standard | Previous three songs used as voting standard | 10 |
| Battle | Barcode | Lee Joo-hyuk of Gift | Things We Took for Granted (당연한 것들) | Lee Juck | 11 |

### 149th Generation Mask King

* Contestants: Kim Chae-won (Iz*One), Kwon Jin-ah, Kim Boa (Keembo) [ko] (Keembo (group) [ko]), Kim Bo-kyung [ko], Park Sang-min, Lee Man-ki, Choi Jung-yoon, Kim Jun-ho

#### Episode 297

Episode 297 was broadcast on March 7, 2021. This marks the beginning of the Hundred-forty-ninth Generation.
| Order | Stage Name | Real Name | Song | Original artist | Vote |
| Round 1 ||||||
| Pair 1 | Formosan Deer | Kim Chae-won of Iz*One | No.1 | BoA | 8 |
| Pair 1 | Ribeye Steak | Kwon Jin-ah | No.1 | BoA | 13 |
| 2nd Song | Formosan Deer | Kim Chae-won of Iz*One | I'm Not Alone (혼자가 아닌 나) | Seo Young-eun [ko] | — |
| Pair 2 | Mugwort | Kim Boa of Keembo | Don't Touch Me | Refund Sisters | 11 |
| Pair 2 | Garlic | Kim Bo-kyung | Don't Touch Me | Refund Sisters | 10 |
| 2nd Song | Garlic | Kim Bo-kyung | A Flying Butterfly (나는 나비) | YB | — |
| Pair 3 | Concert | Park Sang-min | I'm Yours (애모) | Kim Soo-hee | 16 |
| Pair 3 | An Alpine Club | Lee Man-gi | I'm Yours (애모) | Kim Soo-hee | 5 |
| 2nd Song | An Alpine Club | Lee Man-gi | My Heart Aches (가슴 아프게) | Nam Jin | — |
| Pair 4 | Love is Coming Back | Choi Jung-yoon | An Essay of Memory (기억의 습작) | Exhibition [ko] | 9 |
| Pair 4 | Do I Look Like a King? | Kim Jun-ho | An Essay of Memory (기억의 습작) | Exhibition [ko] | 12 |
| 2nd Song | Love is Returning | Choi Jung-yoon | Aloha (아로하) | Cool | — |

#### Episode 298

Episode 298 was broadcast on March 14, 2021.
| Order | Stage Name | Real Name | Song | Original artist | Vote |
| Round 2 ||||||
| Pair 1 | Ribeye Steak | Kwon Jin-ah | As Time Goes By (시간이 흐른 뒤) | T | 7 |
| Pair 1 | Mugwort | Kim Boa of Keembo | Nunu Nana (눈누난나) | Jessi | 14 |
| Pair 2 | Concert | Park Sang-min | Incurable Disease (난치병) | Hareem [ko] | 15 |
| Pair 2 | Do I Look Like a King? | Kim Jun-ho | After the Love Has Gone (사랑한 후에) | Jeon In-kwon | 6 |
| Round 3 ||||||
| Finalists | Mugwort | Kim Boa of Keembo | Sorry (미안해요) | Kim Gun-mo | 13 |
| Finalists | Concert | Park Sang-min | Lifetime (일생을) | Kim Hyun-chul [ko] | 8 |
| Final ||||||
| Battle | Mugwort | Kim Boa of Keembo | Previous three songs used as voting standard | Previous three songs used as voting standard | 5 |
| Battle | Barcode | Lee Joo-hyuk of Gift | Ice Fortress (얼음요새) | Dear Cloud [ko] | 16 |

### 150th Generation Mask King

* Contestants: Woo Soon-sil [ko], Do Sang-woo, Jung Seon-ah [ko], DJ Tukutz (Epik High), Yoo Ji-na [ko], Jeon Tae-poong [ko], Hong Young-joo, Kim Hyun-jung

#### Episode 299

Episode 299 was broadcast on March 21, 2021. This marks the beginning of the Hundred-fiftieth Generation.
| Order | Stage Name | Real Name | Song | Original artist | Vote |
| Round 1 ||||||
| Pair 1 | Yellow | Woo Soon-sil | I'm Happy (난 행복해) | Lee So-ra | 17 |
| Pair 1 | Grey | Do Sang-woo | I'm Happy (난 행복해) | Lee So-ra | 4 |
| 2nd Song | Grey | Do Sang-woo | It's Not Love If It Hurts Too Much (너무 아픈 사랑은 사랑이 아니었음을) | Kim Kwang-seok | — |
| Pair 2 | Baby Goat | Jung Seon-ah | Never Ending Story | Boohwal | 18 |
| Pair 2 | Baby Bear | DJ Tukutz of Epik High | Never Ending Story | Boohwal | 3 |
| 2nd Song | Baby Bear | DJ Tukutz of Epik High | An Ordinary Day (보통날) | g.o.d | — |
| Pair 3 | Good Day | Yoo Ji-na | Train Heading for South (남행열차) | Kim Soo-hee | 16 |
| Pair 3 | Oh, My! | Jeon Tae-poong | Train Heading for South (남행열차) | Kim Soo-hee | 5 |
| 2nd Song | Oh, My! | Jeon Tae-poong | To the Fool ... From the Fool (바보에게... 바보가) | Park Myung-soo | — |
| Pair 4 | 100 Days of Meeting | Hong Young-joo | Romantic Cat (낭만고양이) | Cherry Filter | 5 |
| Pair 4 | The First Day from Today | Kim Hyun-jung | Romantic Cat (낭만고양이) | Cherry Filter | 16 |
| 2nd Song | 100 Days of Meeting | Hong Young-joo | Like an Indian Doll (인디언 인형처럼) | Na-mi | — |

#### Episode 300

Episode 300 was broadcast on March 28, 2021.
| Order | Stage Name | Real Name | Song | Original artist | Vote |
| Round 2 ||||||
| Pair 1 | Yellow | Woo Soon-sil | Facing the Desolate Love (사랑 그 쓸쓸함에 대하여) | Yang Hee-eun | 10 |
| Pair 1 | Baby Goat | Jung Seon-ah | Heaven | Kim Hyun-sung [ko] | 11 |
| Special | Yellow | Woo Soon-sil | The Lost Umbrella (잃어버린 우산) | Woo Soon-sil | — |
| Pair 2 | Good Day | Yoo Ji-na | First Express (첫차) | Seoul Sisters | 7 |
| Pair 2 | The First Day from Today | Kim Hyun-jung | People Who Make Me Sad (나를 슬프게 하는 사람들) | Kim Kyung-ho | 14 |
| Round 3 ||||||
| Finalists | Baby Goat | Jung Seon-ah | Memory of the Wind (바람기억) | Naul | 16 |
| Finalists | Day 1 from Today | Kim Hyun-jung | I Have a Lover (애인 있어요) | Lee Eun-mi | 5 |
| Special | The First Day from Today | Kim Hyun-jung | Breakup with Her (그녀와의 이별) & Bruise (멍) | Kim Hyun-jung | — |
| Final ||||||
| Battle | Baby Goat | Jung Seon-ah | Previous three songs used as voting standard | Previous three songs used as voting standard | 14 |
| Battle | Barcode | Lee Joo-hyuk of Gift | Happy Together | Park Hyo-shin | 7 |

### 151st Generation Mask King

* Contestants: Han Sang-il [ko] (Noise [ko]), Juvie Train (Buga Kingz [ko]), Go Yoo-jin [ko] (Flower), Do Kyung-wan [ko], Lee Eun-ji [ko], Kim Hae-joon [ko], Park Seon-joo [ko], Lee Seung-yeon

#### Episode 301

Episode 301 was broadcast on April 4, 2021. This marks the beginning of the Hundred-fifty-first Generation.
| Order | Stage Name | Real Name | Song | Original artist | Vote |
| Opening | Music Captain of Our Local | Ha Hyun-woo of Guckkasten | Lazenca, Save Us | N.EX.T | — |
| Round 1 ||||||
| Pair 1 | A Musical Representative | Han Sang-il of Noise | One More Step (한 걸음 더) | Yoon Sang | 5 |
| Pair 1 | A Music Register | Juvie Train of Buga Kingz | One More Step (한 걸음 더) | Yoon Sang | 16 |
| 2nd Song | A Musical Representative | Han Sang-il of Noise | It's Been a Long Time (한동안 뜸했었지) | Love and Peace [ko] | — |
| Special | A Musical Representative | Han Sang-il of Noise | What I Wanted from You (너에게 원한건) | Noise [ko] | — |
| Pair 2 | Yoon Sang | Go Yoo-jin of Flower | Beautiful Restriction (아름다운 구속) | Kim Jong-seo | 19 |
| Pair 2 | Yoo Young-seok | Do Kyung-wan | Beautiful Restriction (아름다운 구속) | Kim Jong-seo | 2 |
| 2nd Song | Yoo Young-seok | Do Kyung-wan | Every Moment of You (너의 모든 순간) | Sung Si-kyung | — |
| Pair 3 | Mask Pack | Lee Eun-ji | Love Day | Yang Yo-seob and Jung Eun-ji | 17 |
| Pair 3 | Six Pack | Kim Hae-joon | Love Day | Yang Yo-seob and Jung Eun-ji | 4 |
| 2nd Song | Six Pack | Kim Hae-joon | Should I Say I Love You Again? (다시 사랑한다 말할까) | Kim Dong-ryul | — |
| Pair 4 | Ugly 6-years-old | Park Seon-joo | Sad Fate (슬픈인연) | Na-mi | 19 |
| Pair 4 | Life Starts at 60 | Lee Seung-yeon | Sad Fate (슬픈인연) | Na-mi | 2 |
| 2nd Song | Life Starts at 60 | Lee Seung-yeon | When Love Passes (사랑이 지나가면) | Lee Moon-sae | — |

#### Episode 302

Episode 302 was broadcast on April 11, 2021.
| Order | Stage Name | Real Name | Song | Original artist | Vote |
| Round 2 ||||||
| Pair 1 | A Music Register | Juvie Train of Buga Kingz | Forgive Me (나를 용서해) | Keep Six [ko] | 5 |
| Pair 1 | Yoon Sang | Go Yoo-jin of Flower | Making a New Ending for This Story (이 소설의 끝을 다시 써보려 해) | Han Dong-geun | 16 |
| Pair 2 | Mask Pack | Lee Eun-ji | I'm Feeling Good Day (예감 좋은 날) | Rumble Fish | 1 |
| Pair 2 | Ugly 6-years-old | Park Seon-joo | Wind is Blowing (바람이 분다) | Lee So-ra | 20 |
| Round 3 ||||||
| Finalists | Yoon Sang | Go Yoo-jin of Flower | To Her Love (그녀의 연인에게) | K2 [ko] | 8 |
| Finalists | Ugly 6-years-old | Park Seon-joo | Don't Leave by My Side (내 곁에서 떠나가지 말아요) | The Light and Salt [ko] | 13 |
| Special | Yoon Sang | Go Yoo-jin of Flower | Endless | Flower | — |
| Final ||||||
| Battle | Ugly 6-years-old | Park Seon-joo | Previous three songs used as voting standard | Previous three songs used as voting standard | 9 |
| Battle | Baby Goat | Jung Seon-ah | A World We'll Make (세상은) | Shin Hyo-beom [ko] | 12 |

### 152nd Generation Mask King

* Contestants: Syuka [ko], Song Bong-joo [ko] (Jatanpung [ko]), Lee Jeong-kwon [ko], Park Sung-joon (A.R.T), Woo Yeon-yi [ko], Kim Jong-seok [ko], Noh Hee-ji [ko], Lee Joo-woo

#### Episode 303

Episode 303 was broadcast on April 18, 2021. This marks the beginning of the Hundred-fifty-second Generation.
| Order | Stage Name | Real Name | Song | Original artist | Vote |
| Round 1 ||||||
| Pair 1 | Financial Technology | Syuka | We Need our Love (우리의 사랑이 필요한거죠) | Byun Jin-sub | 2 |
| Pair 1 | At-Home Job | Song Bong-joo of Jatanpung | We Need our Love (우리의 사랑이 필요한거죠) | Byun Jin-sub | 19 |
| 2nd Song | Financial Technology | Syuka | Under the Sky (하늘 아래서) | Kim Min-jong | — |
| Pair 2 | Pizza & Beer | Lee Jeong-kwon | Dream (꿈) | Cho Yong-pil | 17 |
| Pair 2 | Soju & Samgyeopsal | Park Sung-joon of A.R.T | Dream (꿈) | Cho Yong-pil | 4 |
| 2nd Song | Soju & Samgyeopsal | Park Sung-joon of A.R.T | Hometown Station (고향역) | Na Hoon-a | — |
| Pair 3 | First Love | Woo Yeon-yi | Desert Island (무인도) | Kim Choo-ja [ko] | 18 |
| Pair 3 | Last Love | Kim Jong-seok | Desert Island (무인도) | Kim Choo-ja [ko] | 3 |
| 2nd Song | Last Love | Kim Jong-seok | Hands of a Clock (시계바늘) | Shin Yoo [ko] | — |
| Pair 4 | Cook | Noh Hee-ji | Star (별) | Youme [ko] | 4 |
| Pair 4 | Dark History | Lee Joo-woo | Star (별) | Youme [ko] | 17 |
| 2nd Song | Cook | No Hee-ji | Flying Girl (비행소녀) | Magolpy [ko] | — |

#### Episode 304

Episode 304 was broadcast on April 25, 2021.
| Order | Stage Name | Real Name | Song | Original artist | Vote |
| Round 2 ||||||
| Pair 1 | At-Home Job | Song Bong-joo of Jatanpung | Those Days (그날들) | Kim Kwang-seok | 10 |
| Pair 1 | Pizza & Beer | Lee Jeong-kwon | I Hate You (미워요) | Choi Jung-in | 11 |
| Special | At-Home Job | Song Bong-joo of Jatanpung | You're to Me And I'm to You (The Classic OST) (너에게 난, 나에게 넌) | Jatanpung [ko] | — |
| Pair 2 | First Love | Woo Yeon-yi | Unready Farewell (준비 없는 이별) | Green Area [ko] | 17 |
| Pair 2 | Dark History | Lee Joo-woo | Goodbye (잘가요) | Jung Jae-wook [ko] | 4 |
| Round 3 ||||||
| Finalists | Pizza & Beer | Lee Jeong-kwon | From Mark | Ha Dong-kyun | 16 |
| Finalists | First Love | Woo Yeon-yi | I Won't Love (사랑 안 해) | Baek Ji-young | 5 |
| Special | First Love | Woo Yeon-yi | Coincidence (우연히) | Woo Yeon-yi [ko] | — |
| Final ||||||
| Battle | Pizza & Beer | Lee Jeong-kwon | Previous three songs used as voting standard | Previous three songs used as voting standard | 8 |
| Battle | Baby Goat | Jung Seon-ah | Rollin' (롤린) | Brave Girls | 13 |
| Special | Pizza & Beer | Lee Jeong-kwon | Like Those Powerful Salmons That Come Against the River (거꾸로 강을 거슬러 오르는저 힘찬 연어들처럼) | Kang San-ae | — |

### 153rd Generation Mask King

* Contestants: Kang Seung-hee [ko] (Wink), Kang Joo-hee (singer, born 1983) [ko] (Wink), Gil Byung-min [ko] (Letteamor [ko]), Ryu Seung-min, Rocky (Astro), Yoon Hyun-sook [ko] (Zam [ko]), Youme [ko], Sohee (Elris)

#### Episode 305

Episode 305 was broadcast on May 2, 2021. This marks the beginning of the Hundred-fifty-third Generation.
| Order | Stage Name | Real Name | Song | Original artist | Vote |
| Round 1 ||||||
| Pair 1 | Diet | Kang Seung-hee of Wink | Only You Wouldn't Know (너만은 모르길) | As One | 13 |
| Pair 1 | Yo-Yo | Kang Joo-hee of Wink | Only You Wouldn't Know (너만은 모르길) | As One | 8 |
| 2nd Song | Yo-Yo | Kang Joo-hee of Wink | Lying on the Sea (바다에 누워) | The Treble Clef [ko] | — |
| Pair 2 | Dragon Palace Wedding Hall | Gil Byung-min of Letteamor | This Is the Moment (Korean version) (지금 이 순간) | Musical Jekyll and Hyde OST | 17 |
| Pair 2 | Mr. Octopus | Ryu Seung-min | This Is the Moment (Korean version) (지금 이 순간) | Musical Jekyll and Hyde OST | 4 |
| 2nd Song | Mr. Octopus | Ryu Seung-min | You Can Do It (넌 할 수 있어) | Kang San-ae | — |
| Pair 3 | The Bad Son Cries | Rocky of Astro | All for You | Cool | 15 |
| Pair 3 | Good Son | Yoon Hyun-sook of Zam | All for You | Cool | 6 |
| 2nd Song | Good Son | Yoon Hyun-sook of Zam | The Pierrot Laughs at Us (삐에로는 우릴 보고 웃지) | Kim Wan-sun | — |
| Pair 4 | Emerald of May | Youme | One's Way Back (귀로) | Park Seon-joo [ko] | 11 |
| Pair 4 | Daisy of May | Sohee of Elris | One's Way Back (귀로) | Park Seon-joo [ko] | 10 |
| 2nd Song | Daisy of May | Sohee of Elris | Just in Love (꿈을 모아서) | S.E.S. | — |

#### Episode 306

Episode 306 was broadcast on May 9, 2021.
| Order | Stage Name | Real Name | Song | Original artist | Vote |
| Round 2 ||||||
| Pair 1 | Diet | Kang Seung-hee of Wink | Flower Garden (꽃밭에서) | Jung Hoon-hee [ko] | 12 |
| Pair 1 | Dragon Palace Wedding Hall | Gil Byung-min of Letteamor | Forever with You (그대와 영원히) | Lee Moon-sae | 9 |
| Pair 2 | The Bad Son Cries | Rocky of Astro | Hold My Hand (The Greatest Love OST) (내 손을 잡아) | IU | 5 |
| Pair 2 | Emerald of May | Youme | Lost Child (미아) | Lena Park | 16 |
| Round 3 ||||||
| Finalists | Diet | Kang Seung-hee of Wink | Note of Youthfulness (젊음의 노트) | Yoo Mi-ri [ko] | 4 |
| Finalists | Emerald of May | Youme | Wild Flower (야생화) | Park Hyo-shin | 17 |
| Final ||||||
| Battle | Emerald of May | Youme | Previous three songs used as voting standard | Previous three songs used as voting standard | 12 |
| Battle | Baby Goat | Jung Seon-ah | Higher | Ailee | 9 |

### 154th Generation Mask King

* Contestants: Kim Eun-young [ko], Kang Ye-bin [ko], Mo Tae-bum, Bae Jin-young (CIX), Kim Do-hyun [ko], Lee Young-ji, Choi Byung-seo [ko], Jeon In-hyuk [ko] (Yada [ko])

#### Episode 307

Episode 307 was broadcast on May 16, 2021. This marks the beginning of the Hundred-fifty-fourth Generation.
| Order | Stage Name | Real Name | Song | Original artist | Vote |
| Round 1 ||||||
| Pair 1 | Puzzle | Kim Eun-young | If You're Gonna Be Like This (이럴거면) | Ivy | 20 |
| Pair 1 | Blocks | Kang Ye-bin | If You're Gonna Be Like This (이럴거면) | Ivy | 1 |
| 2nd Song | Blocks | Kang Ye-bin | Why Don't You Know (왜 모르니) | Byul | — |
| Pair 2 | Champion | Mo Tae-bum | From January to June (1월부터 6월까지) | 015B & Yoon Jong-shin | 2 |
| Pair 2 | Sesame Oil | Bae Jin-young of CIX | From January to June (1월부터 6월까지) | 015B & Yoon Jong-shin | 19 |
| 2nd Song | Champion | Mo Tae-bum | Marry Me (결혼해줘) | Im Chang-jung | — |
| Pair 3 | I'm Telling You to Go! | Kim Do-hyun | Lonely | 2NE1 | 5 |
| Pair 3 | I'm Getting Off This Time | Lee Young-ji | Lonely | 2NE1 | 16 |
| 2nd Song | I'm Telling You to Go! | Kim Do-hyun | MaMa | Bobby Kim | — |
| Pair 4 | Hanrabong | Choi Byung-seo | The Woman Outside the Window (창밖의 여자) | Cho Yong-pil | 9 |
| Pair 4 | Ttabong | Jeon In-hyuk of Yada | The Woman Outside the Window (창밖의 여자) | Cho Yong-pil | 12 |
| 2nd Song | Hanrabong | Choi Byung-seo | At Andong Station (안동역에서) | Jin Sung [ko] | — |

#### Episode 308

Episode 308 was broadcast on May 23, 2021.
| Order | Stage Name | Real Name | Song | Original artist | Vote |
| Round 2 ||||||
| Pair 1 | Puzzle | Kim Eun-young | Stop the Time (시간아 멈춰라) | Davichi | 15 |
| Pair 1 | Sesame Oil | Bae Jin-young of CIX | Don't Forget (잊어버리지 마) | Crush ft. Taeyeon | 6 |
| Pair 2 | I'm Getting Off This Time | Lee Young-ji | After This Night (이 밤이 지나면) | Yim Jae-beom | 3 |
| Pair 2 | Ttabong | Jeon In-hyuk of Yada | Even Tear Drops in Your Eyes (그대 눈물까지도) | Two Two | 18 |
| Special | I'm Getting Off This Time | Lee Young-ji | I Am Lee Young Ji (나는 이영지) | Lee Young-ji | — |
| Round 3 ||||||
| Finalists | Puzzle | Kim Eun-young | Through the Night (밤편지) | IU | 10 |
| Finalists | Ttabong | Jeon In-hyuk of Yada | Although I Loved You (사랑했지만) | Kim Kwang-seok | 11 |
| Special | Puzzle | Kim Eun-young | Pit-A-Pat (The Greatest Love OST) (두근두근) | Sunny Hill | — |
| Final ||||||
| Battle | Ttabong | Jeon In-hyuk of Yada | Previous three songs used as voting standard | Previous three songs used as voting standard | 1 |
| Battle | Emerald of May | Youme | Live a Long Long Time (그대가 그대를) | Lee Seung-hwan | 20 |

### 155th Generation Mask King

* Contestants: Jang Hyun-chul [ko], Kim Sang-hyuk [ko] (Click-B), Kim Seol [ko], Jin Won [ko], Kim Dong-han (WEi), Dong Hyun-bae [ko], Lee Eun-ha [ko], Jang Yoon-jeong

#### Episode 309

Episode 309 was broadcast on May 30, 2021. This marks the beginning of the Hundred-fifty-fifth Generation.
| Order | Stage Name | Real Name | Song | Original artist | Vote |
| Round 1 ||||||
| Pair 1 | Happiness Does Not Come in Grades | Jang Hyun-chul | Like Rain, Like Music (비처럼 음악처럼) | Kim Hyun-sik | 20 |
| Pair 1 | You're a Student and I'm a Teacher! | Kim Sang-hyuk of Click-B | Like Rain, Like Music (비처럼 음악처럼) | Kim Hyun-sik | 1 |
| 2nd Song | You're a Student and I'm a Teacher! | Kim Sang-hyuk of Click-B | After Breaking Up (헤어진 후에) | Y2K [ko] | — |
| Pair 2 | Cinderella | Kim Seol | Good Day (좋은 날) | IU | 7 |
| Pair 2 | Mozzarella | Jin Won | Good Day (좋은 날) | IU | 14 |
| 2nd Song | Cinderella | Kim Seol | W.H.I.T.E | White [ko] | — |
| Pair 3 | Beware of Dogs | Kim Dong-han of Wei | Only Look at Me (나만 바라봐) | Taeyang | 17 |
| Pair 3 | Be Careful of What you Say | Dong Hyun-bae | Only Look at Me (나만 바라봐) | Taeyang | 4 |
| 2nd Song | Be Careful of What you Say | Dong Hyun-bae | My Only Friend (나만의 친구) | Solid | — |
| Pair 4 | Girl with Short Hair | Lee Eun-ha | Sparks (불티) | Jeon Young-rok [ko] | 20 |
| Pair 4 | Girl with Long Straight Hair | Jang Yoon-jeong | Sparks (불티) | Jeon Young-rok [ko] | 1 |
| 2nd Song | Girl with Long Straight Hair | Jang Yoon-jeong | Some Day (언젠가는) | Lee Tzsche | — |

#### Episode 310

Episode 310 was broadcast on June 6, 2021.
| Order | Stage Name | Real Name | Song | Original artist | Vote |
| Round 2 ||||||
| Pair 1 | Happiness Does Not Come in Grades | Jang Hyun-chul | Heeya (희야) | Boohwal | 12 |
| Pair 1 | Mozzarella | Jin Won | Please Find Her (그녀를 찾아주세요) | The Name [ko] | 9 |
| Pair 2 | Beware of Dogs | Kim Dong-han of Wei | If We (이럴거면 헤어지지 말았어야지) | Park Won [ko] | 3 |
| Pair 2 | Girl with Short Hair | Lee Eun-ha | Change | Jo Jang-hyuk [ko] | 18 |
| Round 3 ||||||
| Finalists | Happiness Does Not Come in Grades | Jang Hyun-chul | Delilah (딜라일라) | Jo Young-nam | 3 |
| Finalists | Girl with Short Hair | Lee Eun-ha | Beautiful Rivers and Mountains (아름다운 강산) | Shin Jung-hyeon | 18 |
| Special | Happiness Does Not Come in Grades | Jang Hyun-chul | Walk to the Sky (걸어서 하늘까지) | Jang Hyun-chul [ko] | — |
| Final ||||||
| Battle | Girl with Short Hair | Lee Eun-ha | Previous three songs used as voting standard | Previous three songs used as voting standard | 10 |
| Battle | Emerald of May | Youme | Come Back Home | 2NE1 | 11 |
| Special | Girl with Short Hair | Lee Eun-ha | You Let Me Go with a Smile (Don't Cry for Me) (미소를 띄우며 나를 보낸 그 모습처럼) | Lee Eun-ha [ko] | — |

### 156th Generation Mask King

* Contestants: Sole (South Korean singer) [ko], Yoon Gi-won [ko], Monday (South Korean singer) [ko] (Weeekly), Nancy Lang, Yeo Esther [ko], Lee Gyu-seok [ko], Park Min-hye [ko] (Big Mama), Choi Byung-chul

#### Episode 311

Episode 311 was broadcast on June 13, 2021. This marks the beginning of the Hundred-fifty-sixth Generation.
| Order | Stage Name | Real Name | Song | Original artist | Vote |
| Round 1 ||||||
| Pair 1 | Shih Tzu | Sole | Love Two (사랑 Two) | Yoon Do-hyun | 17 |
| Pair 1 | Easy | Yoon Gi-won | Love Two (사랑 Two) | Yoon Do-hyun | 4 |
| 2nd Song | Easy | Yoon Gi-won | Met Her 100m Away (그녀를 만나는 곳 100m 전) | Lee Sang-woo [ko] | — |
| Pair 2 | Drawing Lots | Monday of Weeekly | Valenti | BoA | 18 |
| Pair 2 | Ladder Riding | Nancy Lang | Valenti | BoA | 3 |
| 2nd Song | Ladder Riding | Nancy Lang | 3! 4! | Roo'ra | — |
| Pair 3 | Parakeet Couple | Yeo Esther | Let's Go Travel (여행을 떠나요) | Cho Yong-pil | 3 |
| Pair 3 | Chicken Skin Couple | Lee Gyu-seok | Let's Go Travel (여행을 떠나요) | Cho Yong-pil | 18 |
| 2nd Song | Parakeet Couple | Yeo Esther | Secret Love (몰래한 사랑) | Kim Ji-ae [ko] | — |
| Pair 4 | Sori-kkun | Park Min-hye of Big Mama | Gather My Tears (내 눈물 모아) | Seo Ji-won [ko] | 19 |
| Pair 4 | Lover | Choi Byung-chul | Gather My Tears (내 눈물 모아) | Seo Ji-won [ko] | 2 |
| 2nd Song | Lover | Choi Byung-chul | Your Shampoo Scent in the Flowers (흔들리는 꽃들 속에서 네 샴푸향이 느껴진거야) | Jang Beom-june | — |

#### Episode 312

Episode 312 was broadcast on June 20, 2021.
| Order | Stage Name | Real Name | Song | Original artist | Vote |
| Round 2 ||||||
| Pair 1 | Shih Tzu | Sole | Solo | Jennie | 11 |
| Pair 1 | Drawing Lots | Monday of Weeekly | How Can I Love the Heartbreak, You're the One I Love (어떻게 이별까지 사랑하겠어, 널 사랑하는 거지) | AKMU | 10 |
| Pair 2 | Chicken Skin Couple | Lee Gyu-seok | Your Smile in My Memory (미소속에 비친 그대) | Shin Seung-hun | 5 |
| Pair 2 | Sori-kkun | Park Min-hye of Big Mama | Then Something (그런 일은) | Hwayobi | 16 |
| Special | Chicken Skin Couple | Lee Gyu-seok | Trains and Pine Trees (기차와 소나무) | Lee Gyu-seok [ko] | — |
| Round 3 ||||||
| Finalists | Shih Tzu | Sole | I'm in Love | Ra.D | 4 |
| Finalists | Sori-kkun | Park Min-hye of Big Mama | Heaven | Ailee | 17 |
| Final ||||||
| Battle | Sori-kkun | Park Min-hye of Big Mama | Previous three songs used as voting standard | Previous three songs used as voting standard | 16 |
| Battle | Emerald of May | Youme | Don't Be Sad (슬픈 표정 하지 말아요) | Shin Hae-chul | 5 |
| Special | Emerald of May | Youme | Love Is Always Thirsty (사랑은 언제나 목마르다) | Youme [ko] | — |

### 157th Generation Mask King

* Contestants: Choi Ye-na, KyoungSeo, Lee Ji-hoon, Lee Hoon, Lee Jae-young [ko], Oh Ji-heon [ko], Choi Jung-in, Yang Eun-ji [ko]

#### Episode 313

Episode 313 was broadcast on June 27, 2021. This marks the beginning of the Hundred-fifty-seventh Generation.
| Order | Stage Name | Real Name | Song | Original artist | Vote |
| Round 1 ||||||
| Pair 1 | MBTI | Choi Ye-na | Can't Do (못해) | 4Men ft. Mi (美) | 6 |
| Pair 1 | MSG | KyoungSeo | Can't Do (못해) | 4Men ft. Mi (美) | 15 |
| 2nd Song | MBTI | Choi Ye-na | Why Don't You Know | Chungha ft. Nucksal | — |
| Pair 2 | Descendant of the Sun | Lee Ji-hoon | Friends (친구) | Ahn Jae-wook | 17 |
| Pair 2 | Descendant of the Warrior | Lee Hoon | Friends (친구) | Ahn Jae-wook | 4 |
| 2nd Song | Descendant of the Warrior | Lee Hoon | Side Road (골목길) | Shinchon Blues [ko] | — |
| Pair 3 | Flowers | Lee Jae-young | Aspirin (아스피린) | Girl (걸) | 20 |
| Pair 3 | Mushroom | Oh Ji-heon | Aspirin (아스피린) | Girl (걸) | 1 |
| 2nd Song | Mushroom | Oh Ji-heon | Don't Leave Me (날 떠나지마) | Park Jin-young | — |
| Pair 4 | Hwachae | Choi Jung-in | Resignation (체념) | Big Mama | 18 |
| Pair 4 | Cold Vegetables | Yang Eun-ji | Resignation (체념) | Big Mama | 3 |
| 2nd Song | Cold Vegetables | Yang Eun-ji | I Fell in Love (난 사랑에 빠졌죠) | Park Ji-yoon | — |

#### Episode 314

Episode 314 was broadcast on July 4, 2021.
| Order | Stage Name | Real Name | Song | Original artist | Vote |
| Round 2 ||||||
| Pair 1 | MSG | KyoungSeo | If It Is You (Another Miss Oh OST) (너였다면) | Jung Seung-hwan | 5 |
| Pair 1 | Descendant of the Sun | Lee Ji-hoon | Be Forgotten (잊혀지다) | Jung Key ft. Yang Da-il | 16 |
| Pair 2 | Flowers | Lee Jae-young | Hahaha Song (하하하쏭) | Jaurim | 3 |
| Pair 2 | Hwachae | Choi Jung-in | One-sided Love (짝사랑) | Gigs [ko] | 18 |
| Special | Blossom | Lee Jae-young | Temptation (유혹) | Lee Jae-young [ko] | — |
| Round 3 ||||||
| Finalists | Descendant of the Sun | Lee Ji-hoon | Don't Be Happy (행복하지 말아요) | MC the Max | 6 |
| Finalists | Hwachae | Choi Jung-in | Run With Me (도망가자) | Sunwoo Jung-a | 15 |
| Final ||||||
| Battle | Hwachae | Choi Jung-in | Previous three songs used as voting standard | Previous three songs used as voting standard | 11 |
| Battle | Sori-kkun | Park Min-hye of Big Mama | My Story | Brown Eyed Soul | 10 |

### 158th Generation Mask King

* Contestants: Jeong Se-woon, pH-1, Leeds [ko], Kim Young-man [ko], Kim Sa-eun (Musical actress) [ko], Lee Sang-byeok [ko], Yoari [ko], Hyebin [ko] (Momoland)

#### Episode 315

Episode 315 was broadcast on July 11, 2021. This marks the beginning of the Hundred-fifty-eighth Generation.
| Order | Stage Name | Real Name | Song | Original artist | Vote |
| Round 1 ||||||
| Pair 1 | Butter | Jeong Se-woon | Johnny (자니) | Primary ft. Dynamic Duo | 21 |
| Pair 1 | Center | pH-1 | Johnny (자니) | Primary ft. Dynamic Duo | 0 |
| 2nd Song | Center | PH-1 | Expectation (기대) | Na Yoon-kwon [ko] | — |
| Pair 2 | Balloon Flower | Leeds | My Heart Is Near You (내 마음 당신 곁으로) | Kim Jeong-soo [ko] | 18 |
| Pair 2 | X-Large | Kim Young-man | My Heart Is Near You (내 마음 당신 곁으로) | Kim Jeong-soo [ko] | 3 |
| 2nd Song | X-Large | Kim Young-man | It's You (그건 너) | Lee Jang-hee [ko] | — |
| Pair 3 | Sea Otter | Kim Sa-eun | Label of Love (사랑의 이름표) | Hyun Chul [ko] | 15 |
| Pair 3 | Moon of the Sea | Lee Sang-byeok | Label of Love (사랑의 이름표) | Hyun Chul [ko] | 6 |
| 2nd Song | Moon of the Sea | Lee Sang-byeok | Backdaljae with Tears (울고 넘는 박달재) | Park Jae-hong [ko] | — |
| Pair 4 | Fire Staring | Yoari | Remove all Traces of Time (세월의 흔적 다 버리고) | 015B & O.When [ko] | 19 |
| Pair 4 | Water Staring | Hyebin of Momoland | Remove all Traces of Time (세월의 흔적 다 버리고) | 015B & O.When [ko] | 2 |
| 2nd Song | Water Staring | Hyebin of Momoland | Password 486 (비밀번호 486) | Younha | — |

#### Episode 316

Episode 316 was broadcast on July 18, 2021.
| Order | Stage Name | Real Name | Song | Original artist | Vote |
| Round 2 ||||||
| Pair 1 | Butter | Jeong Se-woon | Who Are You (Guardian: The Lonely and Great God OST) | Sam Kim | 8 |
| Pair 1 | Balloon Flower | Leeds | Don't Go Today (오늘은 가지마) | Im Se-joon [ko] | 13 |
| Pair 2 | Sea Otter | Kim Sa-eun | Hey, Hey, Hey | Jaurim | 3 |
| Pair 2 | Fire Staring | Yoari | Feeling | Kim Sa-rang | 18 |
| Round 3 ||||||
| Finalists | Balloon Flower | Leeds | 180 Degree (180도) | Ben | 6 |
| Finalists | Fire Staring | Yoari | A Person in My Dream (몽중인) | Lena Park | 15 |
| Special | Balloon Flower | Leeds | You Will Be Happy without Me (그댄 행복에 살텐데) | Leeds [ko] | — |
| Final ||||||
| Battle | Fire Staring | Yoari | Previous three songs used as voting standard | Previous three songs used as voting standard | 8 |
| Battle | Hwachae | Choi Jung-in | My Ear's Candy (내귀에 캔디) | Baek Ji-young ft. Taecyeon | 13 |

### 159th Generation Mask King

* Contestants: Yang Ji-eun [ko], Kim Jae-yup, Lee Min-hyuk (BtoB), Park Sul-nyeo [ko], Kim Yong-il [ko] (UP [ko]), Choi Eun-joo [ko], Dahyun (Rocket Punch), Bae Doo-hoon [ko] (Forestella)

#### Episode 317

Episode 317 was broadcast on August 8, 2021. This marks the beginning of the Hundred-fifty-ninth Generation.
| Order | Stage Name | Real Name | Song | Original artist | Vote |
| Opening | Honey & Baby | Louie & U Sung-eun | In Summer (여름 안에서) | Deux | — |
| Round 1 ||||||
| Pair 1 | Nightmare | Yang Ji-eun | It's Me (나야 나) | Nam Jin | 19 |
| Pair 1 | Scissors | Kim Jae-yup | It's Me (나야 나) | Nam Jin | 2 |
| 2nd Song | Scissors | Kim Jae-yup | Don't Tackle Me (태클을 걸지마) | Jin Sung [ko] | — |
| Pair 2 | Pineapple | Minhyuk of BtoB | With You Everyday (매일 그대와) | Deulgukhwa [ko] | 14 |
| Pair 2 | Guava | Park Sul-nyeo | With You Everyday (매일 그대와) | Deulgukhwa [ko] | 7 |
| 2nd Song | Guava | Park Sul-nyeo | Give Me Back My Youth (청춘을 돌려다오) | Shin Haeng-il | — |
| Pair 3 | Run to You | Kim Yong-il of UP | Summer Story (여름 이야기) | DJ DOC | 8 |
| Pair 3 | 3!4! | Choi Eun-joo | Summer Story (여름 이야기) | DJ DOC | 13 |
| 2nd Song | Run to You | Kim Yong-il of UP | Don't Say Goodbye (안녕이라고 말하지마) | Lee Seung-chul | — |
| Special | Run to You | Kim Yong-il of UP | The Sea (바다) & Ppuyo Ppuyo (뿌요뿌요) | UP [ko] | — |
| Pair 4 | Girl that Stays at Home a Lot | Dahyun of Rocket Punch | Day by Day | Fly to the Sky | 7 |
| Pair 4 | Non-face-to-face Boyfriend | Bae Doo-hoon of Forestella | Day by Day | Fly to the Sky | 14 |
| 2nd Song | Girl that Stays at Home a Lot | Dahyun of Rocket Punch | I Don't Care | 2NE1 | — |

#### Episode 318

Episode 318 was broadcast on August 15, 2021.
| Order | Stage Name | Real Name | Song | Original artist | Vote |
| Round 2 ||||||
| Pair 1 | Nightmare | Yang Ji-eun | Trap of Youth (청춘의 덫) | Ji Soo [ko] | 16 |
| Pair 1 | Pineapple | Minhyuk of BtoB | Monster | Red Velvet – Irene & Seulgi | 5 |
| Pair 2 | 3!4! | Choi Eun-joo | Kiss Me | S♯arp | 3 |
| Pair 2 | Non-face-to-face Boyfriend | Bae Doo-hoon of Forestella | Timeless | SG Wannabe | 18 |
| Round 3 ||||||
| Finalists | Nightmare | Yang Ji-eun | Yeongam Arirang (영암 아리랑) | Ha Choon-hwa [ko] | 10 |
| Finalists | Non-face-to-face Boyfriend | Bae Doo-hoon of Forestella | Goodbye | Park Hyo-shin | 11 |
| Final ||||||
| Battle | Non-face-to-face Boyfriend | Bae Doo-hoon of Forestella | Previous three songs used as voting standard | Previous three songs used as voting standard | 12 |
| Battle | Hwachae | Choi Jung-in | Fake Love | BTS | 9 |

### 160th Generation Mask King

* Contestants: Bae Seung-min [ko] (Golden Child), Jay B (Got7), Kwak Beom [ko], Sungmin (Super Junior), Im Sung-eun [ko] (Young Turks Club), Christina Confalonieri, Johnny Lee [ko], Park Joon-geum

#### Episode 319

Episode 319 was broadcast on August 22, 2021. This marks the beginning of the Hundred-sixtieth Generation.
| Order | Stage Name | Real Name | Song | Original artist | Vote |
| Round 1 ||||||
| Pair 1 | My House | Seungmin of Golden Child | Fall (어떻게 지내) | Crush | 11 |
| Pair 1 | Toad House | Jay B of Got7 | Fall (어떻게 지내) | Crush | 10 |
| 2nd Song | Toad House | Jay B of Got7 | We Should've Been Friends (친구라도 될걸 그랬어) | Gummy | — |
| Pair 2 | Military Boots | Kwak Beom | Love | Jo Jang-hyuk [ko] | 6 |
| Pair 2 | Rubber Shoes | Sungmin of Super Junior | Love | Jo Jang-hyuk [ko] | 15 |
| 2nd Song | Military Boots | Kwak Beom | Be Mine (내꺼하자) | Infinite | — |
| Pair 3 | Harmonica | Im Sung-eun of Young Turks Club | Americano (아메리카노) | 10cm | 15 |
| Pair 3 | Recorder | Christina Confalonieri | Americano (아메리카노) | 10cm | 6 |
| 2nd Song | Recorder | Christina Confalonieri | Eomeona! (어머나!) | Jang Yoon-jeong | — |
| Pair 4 | Mung-bean Pancake Gentleman | Johnny Lee | I Loved You (사랑했어요) | Kim Hyun-sik | 18 |
| Pair 4 | Florist Lady | Park Joon-geum | I Loved You (사랑했어요) | Kim Hyun-sik | 3 |
| 2nd Song | Florist Lady | Park Joon-geum | Waiting for Tomorrow (내일을 기다려) | Park Kang-sung [ko] | — |

#### Episode 320

Episode 320 was broadcast on August 29, 2021.
| Order | Stage Name | Real Name | Song | Original artist | Vote |
| Round 2 ||||||
| Pair 1 | My House | Seungmin of Golden Child | My House (우리집) | 2PM | 5 |
| Pair 1 | Rubber Shoes | Sungmin of Super Junior | One of My People Go (내 하나의 사람은 가고) | Im Hee-sook [ko] | 16 |
| Pair 2 | Harmonica | Im Sung-eun of Young Turks Club | Stigma (낙인) | Yim Jae-beom | 3 |
| Pair 2 | Mung-bean Pancake Gentleman | Johnny Lee | Faraway, My Honey (님은 먼 곳에) | Kim Choo-ja [ko] | 18 |
| Special | Harmonica | Im Sung-eun of Young Turks Club | Affection (Dangerous Breakup) (정 (위험한 이별)) | Young Turks Club | — |
| Round 3 ||||||
| Finalists | Rubber Shoes | Sungmin of Super Junior | Uphill Road (오르막길) | Yoon Jong-shin ft. Jung-in | 3 |
| Finalists | Mung-bean Pancake Gentleman | Johnny Lee | Camellia Lady (동백아가씨) | Lee Mi-ja | 18 |
| Final ||||||
| Battle | Mung-bean Pancake Gentleman | Johnny Lee | Previous three songs used as voting standard | Previous three songs used as voting standard | 11 |
| Battle | Non-face-to-face Boyfriend | Bae Doo-hoon of Forestella | Marry Me | Maktub [ko] | 10 |

### 161st Generation Mask King

* Contestants: Lim Kim, Bae Young-man [ko], Seo In-young, Lee Euaerin [ko] (Nine Muses), Kim Ji-hyun (Roo'ra), Wang Ji-hye, Lee Dae-hyung, Park Wan-kyu

#### Episode 321

Episode 321 was broadcast on September 5, 2021. This marks the beginning of the Hundred-sixty-first Generation.
| Order | Stage Name | Real Name | Song | Original artist | Vote |
| Round 1 ||||||
| Pair 1 | Rocking Chair | Lim Kim | I Always Miss You (나항상 그대를) | Lee Sun-hee | 13 |
| Pair 1 | Rocking Rock | Bae Young-man | I Always Miss You (나항상 그대를) | Lee Sun-hee | 8 |
| 2nd Song | Rocking Rock | Bae Young-man | Winter Rain Is Falling (겨울비는 내리고) | Kim Beom-ryong [ko] | — |
| Pair 2 | High Heels | Seo In-young | Something | Girl's Day | 19 |
| Pair 2 | Glass Shoes | Lee Euaerin of Nine Muses | Something | Girl's Day | 2 |
| 2nd Song | Glass Shoes | Lee Euaerin of Nine Muses | Star (저 별) | Heize | — |
| Pair 3 | Atlantis Princess | Kim Ji-hyun of Roo'ra | One More Time (한번만 더) | Park Sung-shin [ko] | 17 |
| Pair 3 | Bold Woman | Wang Ji-hye | One More Time (한번만 더) | Park Sung-shin [ko] | 4 |
| 2nd Song | Bold Woman | Wang Ji-hye | After Play (연극이 끝난 후) | S♯arp | — |
| Pair 4 | Good Morning | Lee Dae-hyung | Endless | Flower | 2 |
| Pair 4 | Good Night | Park Wan-kyu | Endless | Flower | 19 |
| 2nd Song | Good Morning | Lee Dae-hyung | Because You're My Woman (내 여자라니까) | Lee Seung-gi | — |

#### Episode 322

Episode 322 was broadcast on September 12, 2021.
| Order | Stage Name | Real Name | Song | Original artist | Vote |
| Round 2 ||||||
| Pair 1 | Rocking Chair | Lim Kim | Flying, Deep in the Night (깊은 밤을 날아서) | Lee Moon-sae | 4 |
| Pair 1 | High Heels | Seo In-young | Sun Sets in My Heart (가슴에 지는 태양) | Kim Bum-soo | 17 |
| Pair 2 | Atlantis Princess | Kim Ji-hyun of Roo'ra | Love is as Like a Fragile Glass (사랑은 유리 같은 것) | Won Joon-hee [ko] | 4 |
| Pair 2 | Good Night | Park Wan-kyu | If I Hold You in My Arms (너를 품에 안으면) | Cult [ko] | 17 |
| Round 3 ||||||
| Finalists | High Heels | Seo In-young | Love, ing (열애중) | Ben | 11 |
| Finalists | Good Night | Park Wan-kyu | For You (너를 위해) | Yim Jae-beom | 10 |
| Final ||||||
| Battle | High Heels | Seo In-young | Previous three songs used as voting standard | Previous three songs used as voting standard | 2 |
| Battle | Mung-bean Pancake Gentleman | Johnny Lee | I Lost Love (사랑을 잃어버린 나) | Lee Kwang-jo [ko] | 19 |

### Chuseok Special: Duet Mask Kings

* Contestants: Kim Min-seok (MeloMance) & Kim Woo-seok (actor), Kihyun (Monsta X) & Jeong Se-woon, Hong Ji-yoon [ko] & Hong Ji-hyun [ko], Lee Min (As One) & Lisa, Kim Tae-gyun & Kim Tae-gyun (Cultwo), Park Hyun-jin [ko] & Park Goo-yoon [ko], Yoon Hyung-bin [ko] & Jung Kyung-mi [ko], Lee Ji-young (singer) [ko] (Big Mama) & Lee Seung-woo (singer) [ko] (Soulstar [ko])

#### Episode 323

Episode 323 was broadcast on September 19, 2021. Winner of this special episodes ("Sibling Rebellion") revealed their identities through a special performance on the beginning of episode 327.
| Order | Stage Name | Real Name | Song | Original artist | Vote |
| Round 1 ||||||
| Pair 1 | Brave Brothers | Kim Min-seok of MeloMance & Kim Woo-seok | And July | Heize ft. Dean ft. DJ Friz [ko] | 14 |
| Pair 1 | Cheongdam-dong Brothers-in-law | Kihyun of Monsta X & Jeong Se-woon | And July | Heize ft. Dean ft. DJ Friz [ko] | 7 |
| 2nd Song | Cheongdam-dong Brothers | Kihyun of Monsta X & Jeong Se-woon | Confession (고백) | Jung Joon-il [ko] | — |
| Pair 2 | Okay, Excited Sisters | Hong Ji-yoon & Hong Ji-hyun | On Rainy Days (비가 오는 날엔) | Beast | 14 |
| Pair 2 | Fantastic Partners | Lee Min of As One & Lisa | On Rainy Days (비가 오는 날엔) | Beast | 7 |
| 2nd Song | Fantastic Partners | Lee Min of As One & Lisa | Just a Feeling | S.E.S. | — |
| Pair 3 | The Fish-Shaped Bun Friend | Former baseball player Kim Tae-gyun & Kim Tae-gyun of Cultwo | You That Meet Unexpectedly (어쩌다 마주친 그대) | Songolmae [ko] | 2 |
| Pair 3 | The 25th Generation of a Famous Singer | Park Hyun-jin & Park Goo-yoon | You That Meet Unexpectedly (어쩌다 마주친 그대) | Songolmae [ko] | 19 |
| 2nd Song | The Fish-Shaped Bun Friend | Former baseball player Kim Tae-gyun & Kim Tae-gyun of Cultwo | That Was What Happened Then (그땐 그랬지) | Carnival [ko] | — |

#### Episode 324

Episode 324 was broadcast on September 26, 2021.
| Order | Stage Name | Real Name | Song | Original artist | Vote |
| Round 1 ||||||
| Pair 4 | Royal Family | Yoon Hyung-bin & Jung Kyung-mi | I Knew that I Love You (사랑하게 될 줄 알았어) | Shin Hyo-beom [ko] | 4 |
| Pair 4 | Sibling Rebellion | Lee Ji-young of Big Mama & Lee Seung-woo of Soulstar | I Knew that I Love You (사랑하게 될 줄 알았어) | Shin Hyo-beom [ko] | 17 |
| 2nd Song | Royal Family | Yoon Hyung-bin & Jung Kyung-mi | The Woman in the Rain (빗속의 여인) | Shin Jung-hyeon | — |
| Round 2 ||||||
| Special | Mung-bean Pancake Gentleman | Johnny Lee | My Way | Frank Sinatra | — |
| Pair 1 | Brave Brothers | Kim Min-seok of MeloMance & Kim Woo-seok | Proposal (청혼) | Noel | 16 |
| Pair 1 | Okay, Excited Sisters | Hong Ji-yoon & Hong Ji-hyun | Twinkle | Girls' Generation-TTS | 5 |
| Pair 2 | The 25th Generation of a Famous Singer | Park Hyun-jin & Park Goo-yoon | Maze of Love (사랑의 미로) | Choi Jin-hee [ko] | 6 |
| Pair 2 | Sibling Rebellion | Lee Ji-young of Big Mama & Lee Seung-woo of Soulstar | Timeless | Zhang Liyin ft. Kim Junsu | 15 |

#### Episode 325

Episode 325 was broadcast on October 3, 2021.
| Order | Stage Name | Real Name | Song | Original artist | Vote |
| Final ||||||
| Finalists | Brave Brothers | Kim Min-seok of MeloMance & Kim Woo-seok | Like a Child (아이처럼) | Kim Dong-ryool | 3 |
| Finalists | Sibling Rebellion | Lee Ji-young of Big Mama & Lee Seung-woo of Soulstar | Hand in Hand (손에 손 잡고) | Koreana | 18 |

### 162nd Generation Mask King

* Contestants: Kim Doo-young [ko], Choi Sung-min [ko], Kim Jin-woong (born 1979) [ko], Park Hyun-woo, Nada, Hwang Youn-joo, Onesun [ko], Kim Yong-jun (SG Wannabe)

#### Episode 325

Episode 325 was broadcast on October 3, 2021. This marks the beginning of the Hundred-sixty-second Generation.
| Order | Stage Name | Real Name | Song | Original artist | Vote |
| Round 1 ||||||
| Pair 1 | Striker | Kim Doo-young | Confession (고백) | Park Hye-kyung [ko] | 3 |
| Pair 1 | Defender | Choi Sung-min | Confession (고백) | Park Hye-kyung [ko] | 18 |
| 2nd Song | Striker | Kim Doo-young | Forever (영원히) | N.EX.T | — |
| Pair 2 | Umbrella | Kim Jin-woong | Tearful Farewell (뜨거운 안녕) | Johnny Lee [ko] | 10 |
| Pair 2 | Woojangsan | Park Hyun-woo | Tearful Farewell (뜨거운 안녕) | Johnny Lee [ko] | 11 |
| 2nd Song | Umbrella | Kim Jin-woong | Sonata of Temptation (유혹의 소나타) | Ivy | — |
| Pair 3 | Red Flavor | Nada | Beautiful | Beast | 18 |
| Pair 3 | Mild Taste | Hwang Youn-joo | Beautiful | Beast | 3 |
| 2nd Song | Mild Taste | Hwang Youn-joo | Farewell for Me (날 위한 이별) | Kim Hye-rim [ko] | — |

#### Episode 326

Episode 326 was broadcast on October 10, 2021.
| Order | Stage Name | Real Name | Song | Original artist | Vote |
| Round 1 ||||||
| Pair 4 | Thunder and Lightning | Onesun | I Miss You | Kang Susie | 1 |
| Pair 4 | Thunder Tiger | Kim Yong-jun of SG Wannabe | I Miss You | Kang Susie | 20 |
| 2nd Song | Thunder and Lightning | Onesun | Dream (꿈) | Lee Hyun-woo | — |
| Round 2 ||||||
| Pair 1 | Defender | Choi Sung-min | Waiting (작은 기다림) | Cool | 10 |
| Pair 1 | Woojangsan | Park Hyun-woo | To Be Alone (홀로 된다는 것) | Byun Jin-sub | 11 |
| Pair 2 | Red Flavor | Nada | With Me | Wheesung (Realslow) | 2 |
| Pair 2 | Thunder Tiger | Kim Yong-jun of SG Wannabe | Love Affair | Im Chang-jung | 19 |
| Round 3 ||||||
| Finalists | Woojangsan | Park Hyun-woo | Empty Heart (허무한 마음) | Jeong Won | 2 |
| Finalists | Thunder Tiger | Kim Yong-jun of SG Wannabe | Distant Memories of You (기억 속의 먼 그대에게) | Park Mi-kyung [ko] | 19 |
| Final ||||||
| Battle | Thunder Tiger | Kim Yong-jun of SG Wannabe | Previous three songs used as voting standard | Previous three songs used as voting standard | 3 |
| Battle | Mung-bean Pancake Gentleman | Johnny Lee | You Lived Like a Fool (바보처럼 살았군요) | Kim Do-hyang [ko] | 18 |

### 163rd Generation Mask King

* Contestants: N/A, Julian Jootaek Kim (Miraclass), Cho Gu-ham, Oh Sang-uk, Kim Young-ok, Maria [ko], Lee Ye-joon [ko], Carlos Galvan [ko] (Uptown)

#### Episode 327

Episode 327 was broadcast on October 17, 2021. This marks the beginning of the Hundred-sixty-third Generation.
| Order | Stage Name | Real Name | Song | Original artist | Vote |
| Special | Sibling Rebellion | Lee Ji-young of Big Mama & Lee Seung-woo of Soulstar [ko] | This Is Me | Keala Settle & The Greatest Showman Ensemble | — |
| Round 1 ||||||
| Pair 1 | Always Hits the Mark | — | — | — | — |
| Pair 1 | Unbeaten | Kim Joo-taek of Miraclass | — | — | — |
| 2nd Song | Always Hits the Mark | — | — | — | — |
| Pair 2 | Fate Symphony | Cho Gu-ham | Dear Love (사랑아) | The One | 17 |
| Pair 2 | Chopsticks March | Oh Sang-uk | Dear Love (사랑아) | The One | 4 |
| 2nd Song | Chopsticks March | Oh Sang-uk | Think of You (네 생각) | John Park | — |
| Pair 3 | Nacho | Kim Young-ok | Sad Story of Old Couple (어느 60대 노부부 이야기) | Kim Mok-kyung [ko] | 7 |
| Pair 3 | Tortilla | Maria | Sad Story of Old Couple (어느 60대 노부부 이야기) | Kim Mok-kyung [ko] | 14 |
| 2nd Song | Nacho | Kim Young-ok | Empty Space (허공) | Cho Yong-pil | — |
| Pair 4 | Bear Sole | Lee Ye-joon | Holding the End of this Night (이 밤의 끝을 잡고) | Solid | 20 |
| Pair 4 | Cow's Feet | Carlos Galvan of Uptown | Holding the End of this Night (이 밤의 끝을 잡고) | Solid | 1 |
| 2nd Song | Cow's Feet | Carlos Galvan of Uptown | A-Yo | Jinusean | — |
| Special | Cow Sole | Carlos Galvan of Uptown | Back to Me (다시 만나줘) | Uptown | — |

#### Episode 328

Episode 328 was broadcast on October 24, 2021.
| Order | Stage Name | Real Name | Song | Original artist | Vote |
| Round 2 ||||||
| Pair 1 | Unbeaten | Kim Joo-taek of Miraclass | Back in Time (시간을 거슬러) | Lyn | 11 |
| Pair 1 | Fate Symphony | Cho Gu-ham | Like It (좋니) | Yoon Jong-shin | 10 |
| Pair 2 | Tortilla | Maria | We Meet Again (또 만났네요) | Joo Hyun-mi | 0 |
| Pair 2 | Bear Sole | Lee Ye-joon | Hello | Huh Gak | 21 |
| Special | Tortilla | Maria | Crying in Regret (English version) (울면서 후회하네) | Joo Hyun-mi | — |
| Round 3 ||||||
| Finalists | Unbeaten | Kim Joo-taek of Miraclass | So You (그래서 그대는) | Yarn [ko] | 4 |
| Finalists | Bear Sole | Lee Ye-joon | Forsake (연) | Big Mama | 17 |
| Final ||||||
| Battle | Bear Sole | Lee Ye-joon | Previous three songs used as voting standard | Previous three songs used as voting standard | 18 |
| Battle | Mung-bean Pancake Gentleman | Johnny Lee | Going Years (가는 세월) | Seo Yoo-seok [ko] | 3 |
| Special | Mung-bean Pancake Gentleman | Johnny Lee | Tearful Farewell (뜨거운 안녕) Love Fool (바보 사랑) | Johnny Lee [ko] | — |

### 164th Generation Mask King

* Contestants: Yukika, Lee Hyun [ko] (5tion), Hwang Soo-kyung [ko], Won Mi-yeon [ko], Kim Sang-woo (Shinchon Blues [ko]), Jo Choon [ko], Yang Jeong-won [ko], Kim Jae-hwan

#### Episode 329

Episode 329 was broadcast on October 31, 2021. This marks the beginning of the Hundred-sixty-fourth Generation.
| Order | Stage Name | Real Name | Song | Original artist | Vote |
| Round 1 ||||||
| Pair 1 | Tagger | Yukika | It's You (그대네요) | Sung Si-kyung & IU | 2 |
| Pair 1 | Cubed Radish Kimchi | Lee Hyun of 5tion | It's You (그대네요) | Sung Si-kyung & IU | 19 |
| 2nd Song | Tagger | Yukika | Umbrella (우산) | Younha | — |
| Pair 2 | Amor Fati | Hwang Soo-kyung | You Let Me Go with a Smile (Don't Cry for Me) (미소를 띄우며 나를 보낸 그 모습처럼) | Lee Eun-ha [ko] | 1 |
| Pair 2 | Happy Halloween | Won Mi-yeon | You Let Me Go with a Smile (Don't Cry for Me) (미소를 띄우며 나를 보낸 그 모습처럼) | Lee Eun-ha [ko] | 20 |
| 2nd Song | Amor Fati | Hwang Soo-kyung | Unpredictable Life (알 수 없는 인생) | Lee Moon-sae | — |
| Pair 3 | Unbelievable | Kim Sang-woo of Shinchon Blues | For Love (사랑을 위하여) | Kim Jong-hwan | 17 |
| Pair 3 | Perfection | Jo Choon | For Love (사랑을 위하여) | Kim Jong-hwan | 4 |
| 2nd Song | Perfection | Jo Choon | Chan Chan Chan (찬찬찬) | Pyeon Seung-yeop [ko] | — |
| Pair 4 | Fairy of Shampoo | Yang Jeong-won | Butterfly (나비야) | Ha Dong-kyun | 2 |
| Pair 4 | Ending Fairy | Kim Jae-hwan | Butterfly (나비야) | Ha Dong-kyun | 19 |
| Special | Ha Dong-kyun | Ha Dong-kyun | Butterfly (나비야) | Ha Dong-kyun | — |
| 2nd Song | Fairy of Shampoo | Yang Jeong-won | I'm Your Girl | S.E.S. | — |

#### Episode 330

Episode 330 was broadcast on November 7, 2021.
| Order | Stage Name | Real Name | Song | Original artist | Vote |
| Round 2 ||||||
| Pair 1 | Cubed Radish Kimchi | Lee Hyun of 5tion | Sea of Love | Fly to the Sky | 4 |
| Pair 1 | Happy Halloween | Won Mi-yeon | Remaining (미련) | Kim Gun-mo | 17 |
| Special | Cubed Radish Kimchi | Lee Hyun of 5tion | More Than Words | 5tion | — |
| Pair 2 | Unbelievable | Kim Sang-woo of Shinchon Blues | Pick Me (나야 나) | Produce 101 | 7 |
| Pair 2 | Ending Fairy | Kim Jae-hwan | Next Level | Aespa | 14 |
| Round 3 ||||||
| Finalists | Happy Halloween | Won Mi-yeon | 365 Days (365일) | Ali | 17 |
| Finalists | Ending Fairy | Kim Jae-hwan | Walking Along (걷고 싶다) | Cho Yong-pil | 4 |
| Final ||||||
| Battle | Happy Halloween | Won Mi-yeon | Previous three songs used as voting standard | Previous three songs used as voting standard | 6 |
| Battle | Bear Sole | Lee Ye-joon | Train to the World (세계로 가는 기차) | Deulgukhwa [ko] | 15 |
| Special | Happy Halloween | Won Mi-yeon | Farewell Trip (이별여행) | Won Mi-yeon [ko] | — |

### 165th Generation Mask King

* Contestants: Linzy [ko] (Fiestar), Kim Kyung-ah [ko], Kim Tae-sul, John Noh [ko] (RabidAnce), Yoo Mi-ri [ko], Park Kang-sung [ko], Kim Heung-soo, Chunja

#### Episode 331

Episode 331 was broadcast on November 14, 2021. This marks the beginning of the Hundred-sixty-fifth Generation.
| Order | Stage Name | Real Name | Song | Original artist | Vote |
| Round 1 ||||||
| Pair 1 | One-off Payment | Linzy of Fiestar | Love | S.E.S. | 17 |
| Pair 1 | Spoonworm | Kim Kyung-ah | Love | S.E.S. | 4 |
| 2nd Song | Spoonworm | Kim Kyung-ah | Two of Us (둘이서) | Lee Chae-yeon | — |
| Pair 2 | Buckwheat Flowers | Kim Tae-sul | Don't Go, Don't Go (가지마 가지마) | Brown Eyes | 6 |
| Pair 2 | Camellia Flower | John Noh of RabidAnce | Don't Go, Don't Go (가지마 가지마) | Brown Eyes | 15 |
| 2nd Song | Buckwheat Flowers | Kim Tae-sul | Do You Want to Walk with Me? (나랑 같이 걸을래 (바른연애 길잡이 X 적재)) | Jukjae [ko] | — |
| Pair 3 | A Woman who Looks Good in Jeans | Yoo Mi-ri | Wishes (희망사항) | Byun Jin-sub | 5 |
| Pair 3 | A Man who Cooks Well Kimchi Fried Rice | Park Kang-sung | Wishes (희망사항) | Byun Jin-sub | 16 |
| 2nd Song | A Woman who Looks Good in Jeans | Yoo Mi-ri | Shaky Friendship (흔들린 우정) | Hong Kyung-min | — |
| Special | A Woman who Looks Good in Jeans | Yoo Mi-ri | Note of Youthfulness (젊음의 노트) | Yoo Mi-ri [ko] | — |
| Pair 4 | Cheer Up, Test-takers! | Kim Heung-soo | Traffic Light (신호등) | Lee Mu-jin | 6 |
| Pair 4 | Boss, Nice Shot! | Chunja | Traffic Light (신호등) | Lee Mu-jin | 15 |
| 2nd Song | Cheer Up, Test-takers! | Kim Heung-soo | Beautiful Fact (아름다운 사실) | Boohwal | — |

#### Episode 332

Episode 332 was broadcast on November 21, 2021.
| Order | Stage Name | Real Name | Song | Original artist | Vote |
| Round 2 ||||||
| Pair 1 | One-off Payment | Linzy of Fiestar | Sending Love (송애) | Esther | 13 |
| Pair 1 | Camellia Flower | John Noh of RabidAnce | The Unwritten Legend (전설속의 누군가처럼) | Shin Seung-hun | 8 |
| Pair 2 | A Man who Cooks Well Kimchi Fried Rice | Park Kang-sung | About Romance (낭만에 대하여) | Choi Baek-ho [ko] | 5 |
| Pair 2 | Boss, Nice Shot! | Chunja | My Love by My Side (내 사랑 내 곁에) | Kim Hyun-sik | 16 |
| Special | A Man who Cooks Well Kimchi Fried Rice | Park Kang-sung | Toy Soldiers (장난감 병정) | Park Kang-sung [ko] | — |
| Round 3 ||||||
| Finalists | One-off Payment | Linzy of Fiestar | One Woman (한 여자) | Ben | 11 |
| Finalists | Boss, Nice Shot! | Chunja | Knees (무릎) | IU | 10 |
| Final ||||||
| Battle | One-off Payment | Linzy of Fiestar | Previous three songs used as voting standard | Previous three songs used as voting standard | 1 |
| Battle | Bear Sole | Lee Ye-joon | Alone (홀로) | Jung Key & Kim Na-young | 20 |

### 166th Generation Mask King

* Contestants: An Yu-jin (Ive), Z-E (rapper) [ko] (Turtles), Jeon Cheol-woo [ko], Im Hyung-soon [ko] (Five Fingers [ko]), Shin Ye-chan (singer) [ko] (Lucy), Im Hyuk-pil [ko], Kwon Soon-woo, Rumble Fish

#### Episode 333

Episode 333 was broadcast on November 28, 2021. This marks the beginning of the Hundred-sixty-sixth Generation.
| Order | Stage Name | Real Name | Song | Original artist | Vote |
| Round 1 ||||||
| Pair 1 | Olivia Hussey | An Yu-jin of Ive | Goodbye (안녕) | Park Hye-kyung [ko] | 13 |
| Pair 1 | Beyoncé | Z-E of Turtles | Goodbye (안녕) | Park Hye-kyung [ko] | 8 |
| 2nd Song | Beyoncé | Z-E of Turtles | I Will Love You (사랑할거야) | Baby Angel | — |
| Pair 2 | Pork Back-bone Stew | Jeon Cheol-woo | I Like Saturday Night (토요일은 밤이 좋아) | Kim Jong-chan [ko] | 5 |
| Pair 2 | Fish Cake Soup | Im Hyung-soon of Five Fingers | I Like Saturday Night (토요일은 밤이 좋아) | Kim Jong-chan [ko] | 16 |
| 2nd Song | Pork Back-bone Stew | Jeon Cheol-woo | Said (라구요) | Kang San-ae | — |
| Pair 3 | I Fall in Love Easily | Shin Ye-chan of Lucy | In Front of the Post Office in Autumn (가을 우체국 앞에서) | Kim Hyun-sung [ko] | 18 |
| Pair 3 | Green Light | Im Hyuk-pil | In Front of the Post Office in Autumn (가을 우체국 앞에서) | Kim Hyun-sung [ko] | 3 |
| 2nd Song | Green Light | Im Hyuk-pil | Spring Days of My Life (내 생애 봄날은) | Can | — |
| Pair 4 | Driving By a Beginner | Kwon Soon-woo | Whistle (휘파람) | Lee Moon-sae | 0 |
| Pair 4 | Driver's License | Rumble Fish | Whistle (휘파람) | Lee Moon-sae | 21 |
| 2nd Song | Driving By a Beginner | Kwon Soon-woo | The Road to Me (내게 오는 길) | Sung Si-kyung | — |

#### Episode 334

Episode 334 was broadcast on December 5, 2021.
| Order | Stage Name | Real Name | Song | Original artist | Vote |
| Round 2 ||||||
| Pair 1 | Olivia Hussey | An Yu-jin of Ive | Nappa (나빠) | Crush | 4 |
| Pair 1 | Fish Cake Soup | Im Hyung-soon of Five Fingers | Moment Seeing First Time (처음 본 순간) | Songolmae [ko] | 17 |
| Pair 2 | I Fall in Love Easily | Shin Ye-chan of Lucy | Because I Love You (사랑하기 때문에) | Yoo Jae-ha | 5 |
| Pair 2 | Driver's License | Rumble Fish | Nocturne (야상곡) | Kim Yoon-ah | 16 |
| Round 3 ||||||
| Finalists | Fish Cake Soup | Im Hyung-soon of Five Fingers | Sad Beatrice (슬픈 베아트리체) | Cho Yong-pil | 8 |
| Finalists | Driver's License | Rumble Fish | Turn on the Radio Loudly (크게 라디오를 켜고) | Sinawe | 13 |
| Special | Fish Cake Soup | Im Hyung-soon of Five Fingers | Balloon (풍선) | Five Fingers [ko] | — |
| Final ||||||
| Battle | Driver's License | Rumble Fish | Previous three songs used as voting standard | Previous three songs used as voting standard | 5 |
| Battle | Bear Sole | Lee Ye-joon | Are You Listening? (듣고 있나요) | Lee Seung-chul | 16 |

### 167th Generation Mask King

* Contestants: Kim Myung-seon [ko], Jo Seung-goo [ko], Bang Eun-hee, Joo Byung-seon [ko], Mirani, Ryuji (singer) [ko] (Broccoli, You Too?), Lee Mu-jin, Choi Joon-suk

#### Episode 335

Episode 335 was broadcast on December 12, 2021. This marks the beginning of the Hundred-sixty-seventh Generation.
| Order | Stage Name | Real Name | Song | Original artist | Vote |
| Round 1 ||||||
| Pair 1 | Let It Go | Kim Myung-seon | Only Just (뿐이고) | Park Goo-yoon [ko] | 4 |
| Pair 1 | Let It Be | Jo Seung-goo | Only Just (뿐이고) | Park Goo-yoon [ko] | 17 |
| 2nd Song | Let It Go | Kim Myung-seon | Ring Ring (따르릉) | Hong Jin-young | — |
| Pair 2 | Shopping Basket | Bang Eun-hee | Happy Our Love (기쁜 우리 사랑은) | Choi Sung-soo [ko] | 3 |
| Pair 2 | Bookmark | Joo Byung-seon | Happy Our Love (기쁜 우리 사랑은) | Choi Sung-soo [ko] | 18 |
| 2nd Song | Shopping Basket | Bang Eun-hee | Seoul Tango (서울 탱고) | Bang Sil-yi [ko] | — |
| Pair 3 | The Game of Go | Mirani | What Do I Do? (어떡하죠) | 2AM | 0 |
| Pair 3 | Puppy | Ryuji of Broccoli You Too | What Do I Do? (어떡하죠) | 2AM | 21 |
| 2nd Song | The Game of Go | Mirani | Rooftop (옥탑방) | N.Flying | — |
| Pair 4 | Winter Kid | Lee Mu-jin | Fate (인연) | Lee Seung-chul | 18 |
| Pair 4 | Winter Sea | Choi Joon-suk | Fate (인연) | Lee Seung-chul | 3 |
| 2nd Song | Winter Sea | Choi Joon-suk | My Woman (내 여자) | The One | — |

#### Episode 336

Episode 336 was broadcast on December 19, 2021.
| Order | Stage Name | Real Name | Song | Original artist | Vote |
| Round 2 ||||||
| Pair 1 | Let It Be | Jo Seung-goo | At Any Time (무시로) | Na Hoon-a | 9 |
| Pair 1 | Bookmark | Joo Byung-seon | Seoul Seoul Seoul (서울 서울 서울) | Cho Yong-pil | 12 |
| Special | Let It Be | Jo Seung-goo | Wind Flower Girl (꽃바람 여인) | Jo Seung-goo [ko] | — |
| Pair 2 | Puppy | Ryuji of Broccoli You Too | Let's Forget About It (이젠 잊기로 해요) | Kim Wan-sun | 0 |
| Pair 2 | Winter Kid | Lee Mu-jin | With You (그대랑) | Lee Juck | 21 |
| Round 3 ||||||
| Finalists | Bookmark | Joo Byung-seon | The Yoke (멍에) | Kim Soo-hee | 3 |
| Finalists | Winter Kid | Lee Mu-jin | To You Again (너에게로 또 다시) | Byun Jin-sub | 18 |
| Special | Bookmark | Joo Byung-seon | Mt. Chilgab (칠갑산) | Joo Byung-seon [ko] | — |
| Final ||||||
| Battle | Winter Kid | Lee Mu-jin | Previous three songs used as voting standard | Previous three songs used as voting standard | 13 |
| Battle | Bear Sole | Lee Ye-joon | Left & Right | Seventeen | 8 |

### 168th Generation Mask King

* Contestants: Thunder, Danny Koo [ko], Kim Sung-kyung, Kim Jang-soo [ko] (The Treble Clef [ko]), Bae Yoon-jeong [ko], Rhee Dae-eun, Lee Kyung-ae [ko], Kim Hye-yeon (South Korean singer) [ko]
Episode 337 was broadcast on December 26, 2021. This marks the beginning of the Hundred-sixty-eighth Generation.
| Order | Stage Name | Real Name | Song | Original artist | Vote |
| Opening | Chow Yun-fat | Seungyoon of Winner | Bounce | Cho Yong-pil | — |
| Round 1 ||||||
| Pair 1 | Rudolph the Red Nosed Reindeer | Thunder | Instinctively (본능적으로) | Yoon Jong-shin | 16 |
| Pair 1 | Arrow Nose | Danny Koo | Instinctively (본능적으로) | Yoon Jong-shin | 5 |
| 2nd Song | Arrow Nose | Danny Koo | Don't Say It's Not Love (사랑이 아니라 말하지 말아요) | Lee So-ra | — |
| Pair 2 | Tiger | Kim Sung-kyung | Somebody's Dream (어떤이의 꿈) | Bom Yeoreum Gaeul Kyeoul | 1 |
| Pair 2 | Dad | Kim Jang-soo of The Treble Clef | Somebody's Dream (어떤이의 꿈) | Bom Yeoreum Gaeul Kyeoul | 20 |
| 2nd Song | Tiger | Kim Sung-kyung | You're in My Embrace (그대 내 품에) | Yoo Jae-ha | — |
| Pair 3 | Graduation Photo | Bae Yoon-jeong | White Winter (하얀 겨울) | Mr. 2 [ko] | 12 |
| Pair 3 | Family Photo | Rhee Dae-eun | White Winter (하얀 겨울) | Mr. 2 [ko] | 9 |
| 2nd Song | Family Photo | Rhee Dae-eun | Confession Is Not Flashy (화려하지 않은 고백) | Lee Seung-hwan | — |
| Pair 4 | Be Careful Not to Catch a Cold! | Lee Kyung-ae | The First Snow's Falling (첫눈이 온다구요) | Lee Jeong-seok [ko] | 4 |
| Pair 4 | Everyone, Be Rich! | Kim Hye-yeon | The First Snow's Falling (첫눈이 온다구요) | Lee Jeong-seok [ko] | 17 |
| 2nd Song | Be Careful Not to Catch a Cold! | Lee Kyung-ae | Spring Rain (봄비) | Lee Eun-ha [ko] | — |