# List of songs recorded by Day6

Here is a complete list of songs by the South Korean band Day6.
* 0–9
* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z

## 0-9

| Song | Artist(s) | Writer(s) | Writer(s) | Writer(s) | Album/Single | Language | Year | Ref. |
| Song | Artist(s) | Lyrics | Composition | Arrangement | Album/Single | Language | Year | Ref. |
| "1 to 10" | Day6 | Young K | Jae Sungjin Young K Wonpil Hong Ji-sang | Hong Ji-sang | The Book of Us: The Demon | Korean | 2020 | |
| "121U" | Day6 | Young K | Jae Sungjin Young K Wonpil Lee Woo-min Hong Ji-sang | Lee Woo-min Hong Ji-sang | Remember Us: Youth Part 2 | Korean | 2018 | |
| "20 (Feat. Young K)" (Young해 (Feat. Young K)) | Jamie Young K | Jamie Young K | Jamie 220 Royal Dive | 220 Royal Dive | 19 to 20 | Korean | 2016 | |
| "365247" | Day6 | Young K | Young K FRANTS | FRANTS | The Book of Us: Entropy | Korean | 2019 | |
| "7-ELEVEN with you" (너의 곁에 세븐일레븐) | Young K | Young K | Young K paulkyte | paulkyte | Non-album single | Korean | 2023 | |

## A

| Song | Artist(s) | Writer(s) | Writer(s) | Writer(s) | Album/Single | Language | Year | Ref. |
| Song | Artist(s) | Lyrics | Composition | Arrangement | Album/Single | Language | Year | Ref. |
| "A Journey" (행운을 빌어 줘) | Wonpil | Wonpil | Wonpil Hong Ji-sang | Hong Ji-sang | Pilmography | Korean | 2022 | |
| "A Writer in a Love Story" (소설 속의 작가가 되어) | Wonpil | Wonpil | Ming Ji-syeon Wonpil | Ming Ji-syeon | Pilmography | Korean | 2022 | |
| "About Now" (지금쯤) | Day6 | Jae Kevin Cho | Jae Kevin Cho | Kevin Cho | The Book of Us: Entropy | Korean | 2019 | |
| "Above the Clouds" (구름 위에서) | Day6 | Jae Sungjin Young K | Jae Sungjin Young K Wonpil Hong Ji-sang | Sungjin Hong Ji-sang | The Book of Us: Negentropy | Korean | 2021 | |
| "Afraid" | Day6 | Sungjin Jeon Da-sol Jae Dogi | Sungjin Jeon Da-sol Jae Dogi | Jae Dogi | The Book of Us: The Demon | Korean | 2020 | |
| "After" (시간의 잔상) | Wonpil | Kul Dan-ji | Kul Dan-ji | Kul Dan-ji | Non-album single | Korean | 2024 | |
| "All Alone" (혼자야) | Day6 | Young K | Hong Ji-sang Jae Sungjin Young K Wonpil | Hong Ji-sang | Every Day6 November | Korean | 2017 | |
| "All Alone" (혼자야) | Day6 | Young K | Hong Ji-sang Jae Sungjin Young K Wonpil | Hong Ji-sang | Moonrise | Korean | 2017 | |
| "All the Things You Wanted" (네가 원했던 것들) | Day6 (Even of Day) | Young K | Young K Wonpil Hong Ji-sang | Hong Ji-sang | Right Through Me | Korean | 2021 | |
| "Am I In Love?" (아마도 사랑인가 봐) | Young K | D'tour | Aaron Kim D'tour Lee Yoo-young | Aaron Kim Lee Yoo-young | Non-album single | Korean | 2023 | |
| "as always" (나무는 결국 겨울을 견뎌낼 거야) | Sungjin | Sungjin | Sungjin Sim Hyun Oh Ji-hyun | Sim Hyun Oh Ji-hyun | 30 | Korean | 2024 | |

## B

| Song | Artist(s) | Writer(s) | Writer(s) | Writer(s) | Album/Single | Language | Year | Ref. |
| Song | Artist(s) | Lyrics | Composition | Arrangement | Album/Single | Language | Year | Ref. |
| "babo" | Young K | Young K | Young K paulkyte | paulkyte | Letters with Notes | Korean | 2023 | |
| "Baby, It's Okay" | Day6 | Young K YHANAEL | Hong Ji-sang Lee Woo-min Jae Sungjin Young K Wonpil | Hong Ji-sang Lee Woo-min | Unlock | Japanese | 2018 | |
| "Be Lazy" | Day6 | Young K | 220 Young K | 220 | Every Day6 July | Korean | 2017 | |
| "Be Lazy" | Day6 | Young K | 220 Young K | 220 | Moonrise | Korean | 2017 | |
| "Beautiful Feeling" | Day6 | Young K Isaac Han | Young K Isaac Han atomik | Isaac Han atomik | Non-album single | Korean | 2018 | |
| "Beautiful Feeling" | Day6 | Young K Isaac Han | Young K Isaac Han atomik | Isaac Han atomik | Remember Us: Youth Part 2 | Korean | 2018 | |
| "Best Part" | Day6 | Young K | Jae Sungjin Young K Wonpil Hong Ji-sang | Hong Ji-sang | The Book of Us: Gravity | Korean | 2019 | |
| "best song" (베스트 송) | Young K | Young K | Young K Hong Ji-sang | Hong Ji-sang | Eternal | Korean | 2021 | |
| "Better Better" | Day6 | Young K | Hong Ji-sang Lee Woo-min Jae Sungjin Young K Wonpil | Hong Ji-sang Lee Woo-min | Moonrise | Korean | 2017 | |
| "Better Day" | Young K | Young K | Hollyway Kim Dae-hyun | Hollyway | Non-album single | Korean | 2023 | |
| "Blood" | Day6 | Jae Young K | 220 Andrew Choi Jae Young K | 220 | Daydream | Korean | 2016 | |
| "Breaking Down" | Day6 | Young K | Cha Il-hoon YUE Young K | Cha Il-hoon YUE REX | Unlock | Japanese | 2018 | |
| "Bungee Jumping" | Young K | Young K | Young K Sim Hyun | Sim Hyun | Letters with Notes | Korean | 2023 | |
| "Butterfly" (나비) | Young K | Han Kyung-su Lee Do-hyeong | Han Kyung-su Lee Do-hyeong | Park Jeong-jun Lim Jun-sik | Castaway Diva OST | Korean | 2023 | |

## C

| Song | Artist(s) | Writer(s) | Writer(s) | Writer(s) | Album/Single | Language | Year | Ref. |
| Song | Artist(s) | Lyrics | Composition | Arrangement | Album/Single | Language | Year | Ref. |
| "Check Pattern" | Sungjin | Sungjin Lee Joo-hyoung Jukjae | Sungjin Lee Joo-hyoung Jukjae | Lee Joo-hyoung Jukjae | 30 | Korean | 2024 | |
| "Chocolate" | Day6 | J.Y. Park Jae Wonpil | Jae Wonpil MAJORCODE Moon Sang-sun | MAJORCODE Moon Sang-sun | Want More 19 OST | Korean | 2018 | |
| "Colors" | Day6 | MR.CHO Jae Sungjin Lim Jun-hyeok Young K Wonpil Dowoon | MR.CHO Jeon Jeong-hoon Cheongdamdong Park Gun-woo Jae Sungjin Lim Jun-hyeok Young K Wonpil Dowoon | MR.CHO Jeon Jeong-hoon Cheongdamdong Park Gun-woo Jae Sungjin Lim Jun-hyeok Young K Wonpil Dowoon | The Day | Korean | 2015 | |
| "Colors (Final Ver.)" | Day6 | MR.CHO Jae Sungjin Lim Jun-hyeok Young K Wonpil Dowoon | MR.CHO Jeon Jeong-hoon Cheongdamdong Park Gun-woo Jae Sungjin Lim Jun-hyeok Young K Wonpil Dowoon | MR.CHO Jeon Jeong-hoon Cheongdamdong Park Gun-woo Jae Sungjin Lim Jun-hyeok Young K Wonpil Dowoon | Moonrise | Korean | 2017 | |
| "come as you are" (그대로 와 줘요) | Young K | Young K | Young K Hong Ji-sang | Hong Ji-sang | Eternal | Korean | 2021 | |
| "Congratulations" | Day6 | Jae Sungjin Lim Jun-hyeok Young K Wonpil Dowoon | Hong Ji-sang Lee Woo-min Jae Sungjin Lim Jun-hyeok Young K Wonpil Dowoon | Hong Ji-sang Lee Woo-min | The Day | Korean | 2015 | |
| "Congratulations (Final Ver.)" | Day6 | Jae Sungjin Lim Jun-hyeok Young K Wonpil Dowoon | Hong Ji-sang Lee Woo-min Jae Sungjin Lim Jun-hyeok Young K Wonpil Dowoon | Hong Ji-sang Lee Woo-min | Sunrise | Korean | 2017 | |
| "Congratulations (Chinese Version)" | Day6 | Jae Sungjin Lim Jun-hyeok Young K Wonpil Dowoon | Hong Ji-sang Lee Woo-min Jae Sungjin Lim Jun-hyeok Young K Wonpil Dowoon | Hong Ji-sang Lee Woo-min | Non-album single | Chinese | 2017 | |
| "Congratulations (English Version)" | Day6 | Jae Sungjin Lim Jun-hyeok Young K Wonpil Dowoon | Hong Ji-sang Lee Woo-min Jae Sungjin Lim Jun-hyeok Young K Wonpil Dowoon | Hong Ji-sang Lee Woo-min | The Best Day | English | 2018 | |
| "Counter" | Day6 | Young K | Sungjin Young K Wonpil Hong Ji-sang | Hong Ji-sang | Band Aid | Korean | 2024 | |
| "Cover" (포장) | Day6 | Sungjin Young K | Sungjin Young K Wonpil Kevin Cho Lee Min-kyung | Kevin Cho | The Book of Us: Gravity | Korean | 2019 | |
| "Covered in Love" (동화 속 아이처럼) | Sungjin | Sungjin | Ming Ji-syeon Sungjin | Ming Ji-syeon | 30 | Korean | 2024 | |

## D

| Song | Artist(s) | Writer(s) | Writer(s) | Writer(s) | Album/Single | Language | Year | Ref. |
| Song | Artist(s) | Lyrics | Composition | Arrangement | Album/Single | Language | Year | Ref. |
| "Dance Dance" | Day6 | Young K | Hong Ji-sang Lee Woo-min Jae Sungjin Young K Wonpil Dowoon | Hong Ji-sang Lee Woo-min | Every Day6 May | Korean | 2017 | |
| "Dance Dance" | Day6 | Young K | Hong Ji-sang Lee Woo-min Jae Sungjin Young K Wonpil Dowoon | Hong Ji-sang Lee Woo-min | Sunrise | Korean | 2017 | |
| "Day and Night" (해와 달처럼) | Day6 | Young K | Jae Sungjin Young K Wonpil Hong Ji-sang | Hong Ji-sang | The Book of Us: The Demon | Korean | 2020 | |
| "days gone by" (행복했던 날들이었다) | Day6 | Young K | Jae Sungjin Young K Wonpil Hong Ji-sang | Hong Ji-sang | Remember Us: Youth Part 2 | Korean | 2018 | |
| "Deep in love" | Day6 | Young K | Jae Sungjin Young K Wonpil Hong Ji-sang | Hong Ji-sang | The Book of Us: Entropy | Korean | 2019 | |
| "Did You Wake Up?" (일어났어?) | Hello Ga-Young Wonpil | Hello Ga-Young | Hello Ga-Young | Jo Sung-tae | Non-album single | Korean | 2020 | |
| "Didn't Know" (그게 너의 사랑인지 몰랐어) | Day6 | Sungjin Young K Wonpil Hong Ji-sang | Sungjin Young K Wonpil Hong Ji-sang | Hong Ji-sang | Fourever | Korean | 2024 | |
| "Dreamer" (꿈꾼) | Young K | Young K | Young K Hong Ji-sang | Hong Ji-sang | Letters with Notes | Korean | 2023 | |

## E

| Song | Artist(s) | Writer(s) | Writer(s) | Writer(s) | Album/Single | Language | Year | Ref. |
| Song | Artist(s) | Lyrics | Composition | Arrangement | Album/Single | Language | Year | Ref. |
| "EASY" | Sungjin | Sungjin | Sungjin Sim Hyun | Sim Hyun | 30 | Korean | 2024 | |
| "Emergency" | Day6 | Jae Sim Eun-jee Lee Hae-sol | Jae Sim Eun-jee Lee Hae-sol | Sim Eun-jee Lee Hae-sol | The Book of Us: Entropy | Korean | 2019 | |
| "Everybody Rock!" | Day6 | Young K Co-sho | FRANTS Young K | FRANTS | Unlock | Japanese | 2018 | |
| "everyday we fight" | Day6 | Young K Wonpil | Jae Hong Ji-sang | Hong Ji-sang | The Book of Us: Negentropy | Korean | 2021 | |

## F

| Song | Artist(s) | Writer(s) | Writer(s) | Writer(s) | Album/Single | Language | Year | Ref. |
| Song | Artist(s) | Lyrics | Composition | Arrangement | Album/Single | Language | Year | Ref. |
| "Falling" | Day6 | Jae Sungjin Young K | Shinichi Ubukata Jae Sungjin Young K Wonpil Dowoon | Shinichi Ubukata | Unlock | Japanese | 2018 | |
| "Feeling Good" | Day6 | Young K | Hong Ji-sang Jae Sungjin Young K Wonpil | Hong Ji-sang | Shoot Me: Youth Part 1 | Korean | 2018 | |
| "Finale" | Day6 | Young K KOMU | Sungjin Young K Kevin G. Cho Jeon Da-sol Bae Jae-seok | Jeon Da-sol | The Best Day2 | Japanese | 2019 | |
| "First Time" | Day6 | Jae Sungjin Young K Wonpil Dowoon | Hong Ji-sang Lee Woo-min Jae Sungjin Young K Wonpil Dowoon | Hong Ji-sang Lee Woo-min | Daydream | Korean | 2016 | |
| "For me" | Day6 | Young K | Jae Sungjin Young K Wonpil Hong Ji-sang | Hong Ji-sang | The Book of Us: Gravity | Korean | 2019 | |
| "Forest -Interlude 2- (with DENIMALZ 3)" | Day6 (Even of Day) | Young K | Hong Ji-sang | Hong Ji-sang | The Book of Us: Gluon | Korean | 2020 | |
| "Freely" (Free하게) | Day6 | naru Jae Sungjin Lim Jun-hyeok Young K Wonpil Dowoon | naru Jae Sungjin Lim Jun-hyeok Young K Wonpil Dowoon | naru | The Day | Korean | 2015 | |
| "Freely (Final Ver.)" (Free하게 (Final Ver.)) | Day6 | naru Jae Sungjin Lim Jun-hyeok Young K Wonpil Dowoon | naru Jae Sungjin Lim Jun-hyeok Young K Wonpil Dowoon | naru | Moonrise | Korean | 2017 | |
| "From the Ending of a Tragedy" (비극의 결말에서) | Day6 (Even of Day) | Young K | Young K Wonpil Hong Ji-sang | Hong Ji-sang | Right Through Me | Korean | 2021 | |

## G

| Song | Artist(s) | Writer(s) | Writer(s) | Writer(s) | Album/Single | Language | Year | Ref. |
| Song | Artist(s) | Lyrics | Composition | Arrangement | Album/Single | Language | Year | Ref. |
| "Get The Hell Out" (널 제외한 나의 뇌) | Day6 | Young K | Sungjin Wonpil Hong Ji-sang | Hong Ji-sang | Fourever | Korean | 2024 | |
| "Good-Bye Days" | Wonpil Kei | Yui Kim Han-sol | Yui 1Division | Kim Nam-hun | Midnight Sun Part.2 | Korean | 2021 | |
| "Goodbye Winter" (겨울이 간다) | Day6 | Jae Sungjin Young K YUE Cha Il-hoon | Jae Sungjin Young K YUE Cha Il-hoon | YUE Cha Il-hoon Yun Eun-suk | Every Day6 January | Korean | 2017 | |
| "Goodbye Winter" (겨울이 간다) | Day6 | Jae Sungjin Young K YUE Cha Il-hoon | Jae Sungjin Young K YUE Cha Il-hoon | YUE Cha Il-hoon Yun Eun-suk | Sunrise | Korean | 2017 | |
| "goodnight, dear" (잘 자라 내 사람아) | Young K | Young K | Young K | Jeog Jai | Eternal | Korean | 2021 | |
| "Guard You" (끝까지 안아 줄게) | Young K | Young K | Young K Hong Ji-sang | Hong Ji-sang | Eternal | Korean | 2021 | |

## H

| Song | Artist(s) | Writer(s) | Writer(s) | Writer(s) | Album/Single | Language | Year | Ref. |
| Song | Artist(s) | Lyrics | Composition | Arrangement | Album/Single | Language | Year | Ref. |
| "Habits" (버릇이 됐어) | Day6 | MR.CHO Jae Sungjin Lim Jun-hyeok Young K Wonpil Dowoon | MR.CHO Cheongdamdong Park Gun-woo Jae Sungjin Lim Jun-hyeok Young K Wonpil Dowoon | MR.CHO Cheongdamdong Park Gun-woo Jae Sungjin Lim Jun-hyeok Young K Wonpil Dowoon | The Day | Korean | 2015 | |
| "Habits (Final Ver.)" (버릇이 됐어 (Final Ver.)) | Day6 | MR.CHO Jae Sungjin Lim Jun-hyeok Young K Wonpil Dowoon | MR.CHO Cheongdamdong Park Gun-woo Jae Sungjin Lim Jun-hyeok Young K Wonpil Dowoon | MR.CHO Cheongdamdong Park Gun-woo Jae Sungjin Lim Jun-hyeok Young K Wonpil Dowoon | Moonrise | Korean | 2017 | |
| "Happy" | Day6 | Young K | Sungjin Wonpil Hong Ji-sang | Hong Ji-sang | Fourever | Korean | 2024 | |
| "Headache" (두통) | Day6 | Jae Young K | Jae Sungjin Young K Wonpil Hong Ji-sang | Hong Ji-sang | Remember Us: Youth Part 2 | Korean | 2018 | |
| "Healer" | Day6 | Young K | Jae Young K Wonpil Hong Ji-sang | Hong Ji-sang | The Book of Us: Negentropy | Korean | 2021 | |
| "Help Me Rock&Roll" (도와줘요 Rock&Roll) | Day6 | Sungjin Wonpil Hong Ji-sang | Sungjin Wonpil Hong Ji-sang | Hong Ji-sang | Band Aid | Korean | 2024 | |
| "Hey" (있잖아) | Day6 (Even of Day) | Seo Ji-um | 1601 | Cha Il-hoon Dowoon | Non-album single | Korean | 2020 | |
| "Hi Hello" | Day6 | Young K | Hong Ji-sang Lee Woo-min Jae Sungjin Young K Wonpil | Hong Ji-sang Lee Woo-min | Every Day6 July | Korean | 2017 | |
| "Hi Hello" | Day6 | Young K | Hong Ji-sang Lee Woo-min Jae Sungjin Young K Wonpil | Hong Ji-sang Lee Woo-min | Moonrise | Korean | 2017 | |
| "Home Alone" (나 홀로 집에) | Day6 (Even of Day) | Wonpil | Young K Wonpil Hong Ji-sang | Hong Ji-sang | Right Through Me | Korean | 2021 | |
| "How Can I Say" (어떻게 말해) | Day6 | Young K Wonpil | Hong Ji-sang Lee Woo-min Jae Sungjin Young K Wonpil | Hong Ji-sang Lee Woo-min | Every Day6 March | Korean | 2017 | |
| "How Can I Say" (어떻게 말해) | Day6 | Young K Wonpil | Hong Ji-sang Lee Woo-min Jae Sungjin Young K Wonpil | Hong Ji-sang Lee Woo-min | Sunrise | Korean | 2017 | |
| "How to love" | Day6 | Young K | Jae Sungjin Young K Wonpil Hong Ji-sang | Hong Ji-sang | The Book of Us: Gravity | Korean | 2019 | |
| "Hunt" | Day6 | FRANTS Young K Wonpil | FRANTS Young K Wonpil | FRANTS | Daydream | Korean | 2016 | |
| "Hurt Road" (아픈 길) | Day6 | Young K | Jae Sungjin Young K Wonpil Hong Ji-sang | Hong Ji-sang | Remember Us: Youth Part 2 | Korean | 2018 | |
| "Hurt Road" (아픈 길) | Young K Kim Min-seok Jung Nam-do Yeom Woo-jin Lim Jung-hyun Kim Young-seok | Young K | Jae Sungjin Young K Wonpil Hong Ji-sang | Koh Hyung-seok | King of Karaoke: VS EPISODE 1 | Korean | 2023 | |

## I

| Song | Artist(s) | Writer(s) | Writer(s) | Writer(s) | Album/Single | Language | Year | Ref. |
| Song | Artist(s) | Lyrics | Composition | Arrangement | Album/Single | Language | Year | Ref. |
| "I don't wanna do anything" (아무것도 안 하고 싶다) | Sungjin | Sungjin | Sungjin MooF | MooF | 30 | Korean | 2024 | |
| "I don't wanna lose" | Sungjin | Sungjin Jeon Da-sol | Sungjin Jeon Da-sol | Jeon Da-sol | 30 | Korean | 2024 | |
| "I Just" | Day6 | Young K KOMU | Cha Il-hoon Young K Wonpil | Cha Il-hoon Wonpil | Unlock | Japanese | 2018 | |
| "I Like You" (좋아합니다) | Day6 | Young K | Hong Ji-sang Lee Woo-min Jae Sungjin Young K Wonpil | Hong Ji-sang Lee Woo-min | Moonrise | Korean | 2017 | |
| "I Loved You" | Day6 | Young K | Hong Ji-sang Lee Woo-min Jae Sungjin Young K Wonpil | Hong Ji-sang Lee Woo-min | Every Day6 September | Korean | 2017 | |
| "I Loved You" | Day6 | Young K | Hong Ji-sang Lee Woo-min Jae Sungjin Young K Wonpil | Hong Ji-sang Lee Woo-min | Moonrise | Korean | 2017 | |
| "I Need Somebody" (누군가 필요해) | Day6 | Young K Kevin Cho | Kevin Cho Young K Jae Dogi | Kevin Cho Jae Dogi | Every Day6 October | Korean | 2017 | |
| "I Need Somebody" (누군가 필요해) | Day6 | Young K Kevin Cho | Kevin Cho Young K Jae Dogi | Kevin Cho Jae Dogi | Moonrise | Korean | 2017 | |
| "I Smile" (반드시 웃는다) | Day6 | Young K Wonpil | Hong Ji-sang Lee Woo-min Sungjin Young K Wonpil | Hong Ji-sang Lee Woo-min | Sunrise | Korean | 2017 | |
| "I Wait" (아 왜) | Day6 | Young K | Hong Ji-sang Lee Woo-min Jae Young K Wonpil | Hong Ji-sang Lee Woo-min | Every Day6 January | Korean | 2017 | |
| "I Wait" (아 왜) | Day6 | Young K | Hong Ji-sang Lee Woo-min Jae Young K Wonpil | Hong Ji-sang Lee Woo-min | Sunrise | Korean | 2017 | |
| "I Wait (Japanese Version)" | Day6 | Young K | Hong Ji-sang Lee Woo-min Jae Young K Wonpil | Hong Ji-sang Lee Woo-min | The Best Day | Japanese | 2018 | |
| "I Would" (그럴 텐데) | Day6 | Young K | Hong Ji-sang Lee Woo-min Jae Young K Wonpil | Hong Ji-sang Lee Woo-min | Every Day6 March | Korean | 2017 | |
| "I Would" (그럴 텐데) | Day6 | Young K | Hong Ji-sang Lee Woo-min Jae Young K Wonpil | Hong Ji-sang Lee Woo-min | Sunrise | Korean | 2017 | |
| "If ~Mata Aetara~" (If ~また逢えたら~) | Day6 | Young K KOMU | Cha Il-hoon YUE Sungjin Young K Wonpil | Cha Il-hoon YUE | Unlock | Japanese | 2018 | |
| "I'll Remember" (남겨둘게) | Day6 | Young K | Hong Ji-sang Lee Woo-min Jae Sungjin Young K Wonpil | Hong Ji-sang Lee Woo-min | Every Day6 September | Korean | 2017 | |
| "I'll Remember" (남겨둘게) | Day6 | Young K | Hong Ji-sang Lee Woo-min Jae Sungjin Young K Wonpil | Hong Ji-sang Lee Woo-min | Moonrise | Korean | 2017 | |
| "I'll Try" (노력해볼게요) | Day6 | Kevin Cho Wonpil | Kevin Cho Wonpil Lee Min-kyung | Kevin Cho Lee Min-kyung | Moonrise | Korean | 2017 | |
| "I'm Fine" | Day6 | Sungjin Young K Wonpil Hong Ji-sang | Sungjin Young K Wonpil Hong Ji-sang | Hong Ji-sang | Band Aid | Korean | 2024 | |
| "I'm Serious" (장난 아닌데) | Day6 | Sungjin Young K Wonpil | Hong Ji-sang Lee Woo-min Sungjin Wonpil | Hong Ji-sang Lee Woo-min | Every Day6 April | Korean | 2017 | |
| "I'm Serious" (장난 아닌데) | Day6 | Sungjin Young K Wonpil | Hong Ji-sang Lee Woo-min Sungjin Wonpil | Hong Ji-sang Lee Woo-min | Sunrise | Korean | 2017 | |
| "Insomnia" (불면증) | Young K | Young K | Park Ddol-i Peter Pan | Hwang Hyun-sung | Let Me Off the Earth OST | Korean | 2020 | |
| "Insomnia Future Bass Remix" (불면증 Future Bass Remix) | Young K | Young K | Park Ddol-i Peter Pan | Waveshower | Let Me Off the Earth OST | Korean | 2020 | |

## K

| Song | Artist(s) | Writer(s) | Writer(s) | Writer(s) | Album/Single | Language | Year | Ref. |
| Song | Artist(s) | Lyrics | Composition | Arrangement | Album/Single | Language | Year | Ref. |
| "Kiminara" (君なら) | Day6 | Young K | Cha Il-hoon YUE Jeon Woo-seok Young K Wonpil | Cha Il-hoon YUE | The Best Day2 | Japanese | 2019 | |

## L

| Song | Artist(s) | Writer(s) | Writer(s) | Writer(s) | Album/Single | Language | Year | Ref. |
| Song | Artist(s) | Lyrics | Composition | Arrangement | Album/Single | Language | Year | Ref. |
| "Landed" (그렇게 너에게 도착하였다) | Day6 (Even of Day) | Young K | Young K Wonpil Hong Ji-sang | Hong Ji-sang | The Book of Us: Gluon | Korean | 2020 | |
| "Landing -Intro- (with DENIMALZ 3)" | Day6 (Even of Day) | Young K | Hong Ji-sang | Hong Ji-sang | | The Book of Us: Gluon | Korean | 2020 |
| "Last Goodbye" (늦은 끝) | Wonpil | Wonpil | Ming Ji-syeon Wonpil | Ming Ji-syeon | Pilmography | Korean | 2022 | |
| "Lean On Me" (오늘은 내게) | Day6 | Sungjin Young K Wonpil | Hong Ji-sang Lee Woo-min Swanthewhitepig Jae Sungjin Young K Wonpil | Hong Ji-sang Lee Woo-min Swanthewhitepig | Sunrise | Korean | 2017 | |
| "Leaves (Feat. Young K)" | Ben&Ben Young K | Paolo Benjamin G.Guico | — | — | Non-album single | English | 2021 | |
| "let it be summer" | Young K | Young K | Young K Hong Ji-sang | Hong Ji-sang | Letters with Notes | Korean | 2023 | |
| "Let Me Love You" (사랑하게 해주라) | Day6 | Young K | Sungjin Wonpil Hong Ji-sang | Hong Ji-sang | Fourever | Korean | 2024 | |
| "Letting Go" (놓아 놓아 놓아) | Day6 | Young K Wonpil | Hong Ji-sang Lee Woo-min Young K Wonpil | Hong Ji-sang Lee Woo-min | Daydream | Korean | 2016 | |
| "Letting Go (Rebooted Ver.)" (놓아 놓아 놓아 (Rebooted Ver.)) | Day6 | Young K Wonpil | Hong Ji-sang Lee Woo-min Young K Wonpil | Hong Ji-sang Lee Woo-min | Sunrise | Korean | 2017 | |
| "Like A Fire" | Wonpil | Kim Ho-kyung Park Tae-hyun | 1601 | 1601 | Best Mistake OST | Korean | 2022 | |
| "Like That Sun" (태양처럼) | Day6 | FRANTS Jae Sungjin Lim Jun-hyeok Young K Wonpil Dowoon | FRANTS Jae Sungjin Lim Jun-hyeok Young K Wonpil Dowoon | FRANTS | The Day | Korean | 2015 | |
| "Like That Sun (Final Ver.)" (태양처럼 (Final Ver.)) | Day6 | FRANTS Jae Sungjin Lim Jun-hyeok Young K Wonpil Dowoon | FRANTS Jae Sungjin Lim Jun-hyeok Young K Wonpil Dowoon | FRANTS | Moonrise | Korean | 2017 | |
| "Like a Flowing Wind" (마치 흘러가는 바람처럼) | Day6 | Young K Wonpil | Wonpil Kim Yeon-seo Ming Ji-syeon | Ming Ji-syeon | The Book of Us: Entropy | Korean | 2019 | |
| "Live Your Life" | Day6 | Young K | Cha Il-hoon Young K | Cha Il-hoon REX Young K | Unlock | Japanese | 2018 | |
| "Love (with Young K of Day6)" | X Lovers Young K | London Jackson Jacob Ames | London Jackson Jacob Ames | — | Non-album single | Korean | 2020 | |
| "Love me or Leave me" | Day6 | Young K | Jae Sungjin Young K Wonpil Hong Ji-sang | Hong Ji-sang | The Book of Us: The Demon | Korean | 2020 | |
| "Love Parade" | Day6 (Even of Day) | Young K Wonpil | Young K Wonpil Hong Ji-sang | Hong Ji-sang | Right Through Me | Korean | 2021 | |
| "Love Song" (사랑노래) | The Blank Shop Wonpil | Yun Seok-cheol | Yun Seok-cheol | Yun Seok-cheol | Tailor | Korean | 2020 | |
| "Loveholic" | Day6 | Lee Jae-hak | Lee Jae-hak | Cha Il-hoon Dowoon | Psycho, Loveholic [THE SEASONS: Red Carpet with Lee Hyo Ri] | Korean | 2024 | |
| "Lovely Girl" | 5Live | Jung Eugene Shim Jae-hee | Kim Hyung-suk | Yun Woo-suk Lee Dae-hee | Bel Ami OST | Korean | 2013 | |

## M

| Song | Artist(s) | Writer(s) | Writer(s) | Writer(s) | Album/Single | Language | Year | Ref. |
| Song | Artist(s) | Lyrics | Composition | Arrangement | Album/Single | Language | Year | Ref. |
| "Man in a movie" | Day6 | Young K | Hong Ji-sang Sungjin Young K Wonpil | Hong Ji-sang | Every Day6 May | Korean | 2017 | |
| "Man in a movie" | Day6 | Young K | Hong Ji-sang Sungjin Young K Wonpil | Hong Ji-sang | Sunrise | Korean | 2017 | |
| "Marathon" (마라톤) | Day6 | Young K Kevin Cho | Young K Wonpil Kevin Cho | Kevin Cho | Remember Us: Youth Part 2 | Korean | 2018 | |
| "Maybe Next Time (feat. Young K)" | Jamie Miller Young K | Jamie Miller Adam Yaron Caleb Shapiro | Jamie Miller Adam Yaron Caleb Shapiro Moira Dela Torre | — | Non-album single | English | 2023 | |
| "Meet Me When The Sun Goes Down" (태양이 지면 널 만나러 갈게) | Wonpil | Kim Han-sol | Han Bo-ram | 1Division Kim Nam-hun | Midnight Sun Part.2 | Korean | 2021 | |
| "Melt Down" (녹아내려요) | Day6 | Young K | Sungjin Young K Wonpil Hong Ji-sang | Hong Ji-sang | Band Aid | Korean | 2024 | |
| "Memories" | Sungjin | Sungjin | Sungjin Sim Hyun Oh Ji-hyun | Sim Hyun Oh Ji-hyun | 30 | Korean | 2024 | |
| "Microphone (Feat. Dvwn)" | Young K Dvwn | Young K Dvwn | Young K HotSauce | HotSauce | Eternal | Korean | 2021 | |
| "Monster" (괴물) | Day6 | Young K | Sungjin Young K Wonpil Dowoon Hong Ji-sang | Hong Ji-sang | Band Aid | Korean | 2024 | |
| "My Day" | Day6 | Young K | Cho Gae-hyuk Ju Hyo Young K Wonpil | Cho Gae-hyuk Ju Hyo Young K Wonpil Dowoon | Every Day6 February | Korean | 2017 | |
| "My Day" | Day6 | Young K | Cho Gae-hyuk Ju Hyo Young K Wonpil | Cho Gae-hyuk Ju Hyo Young K Wonpil Dowoon | Sunrise | Korean | 2017 | |

## N

| Song | Artist(s) | Writer(s) | Writer(s) | Writer(s) | Album/Single | Language | Year | Ref. |
| Song | Artist(s) | Lyrics | Composition | Arrangement | Album/Single | Language | Year | Ref. |
| "naps!" | 1415 Wonpil | Oh Ji-hyun | Joo Seoung-geun Oh Ji-hyun Sim Hyun | Joo Seoung-geun Oh Ji-hyun | naps! | Korean | 2021 | |
| "natural" | Young K | Young K | Young K U-lu Nomasgood 8Hoop | U-lu Nomasgood 8Hoop | Letters with Notes | Korean | 2023 | |
| "Nobody Knows" | Day6 | Sungjin Young K Wonpil FRANTS KOMU | FRANTS Sungjin Young K Wonpil | FRANTS | Unlock | Japanese | 2018 | |
| "Not Fine" (나빠) | Day6 | Young K | Jae Sungjin Young K Wonpil Hong Ji-sang | Hong Ji-sang | The Book of Us: Entropy | Korean | 2019 | |
| "not gonna love" (사랑은 얼어 죽을) | Young K | Young K | Young K Hong Ji-sang | Hong Ji-sang | Eternal | Korean | 2021 | |
| "Not Mine" | Day6 | Wonpil Jeon Da-sol Jae Dogi | Wonpil Jeon Da-sol Jae Dogi | Jeon Da-sol | The Book of Us: Entropy | Korean | 2019 | |
| "nothing but" (이것밖에는 없다) | Young K | Young K Hong Ji-sang | Young K Hong Ji-sang | Hong Ji-sang | Letters with Notes | Korean | 2023 | |
| "Nowhere You Are" (어디에도 없는 널) | Sungjin | Sungjin D'tour | Sungjin Aaron Kim HAHM BYDOR ARCHIVE wez Isaac Han | HAHM BYDOR ARCHIVE Aaron Kim | 30 | Korean | 2024 | |

## O

| Song | Artist(s) | Writer(s) | Writer(s) | Writer(s) | Album/Single | Language | Year | Ref. |
| Song | Artist(s) | Lyrics | Composition | Arrangement | Album/Single | Language | Year | Ref. |
| "Ocean -Interlude 1- (with DENIMALZ 3)" | Day6 (Even of Day) | Young K | Young K Hong Ji-sang | Hong Ji-sang | The Book of Us: Gluon | Korean | 2020 | |
| "On Rainy Days" (비가 오는 날엔) | Wonpil Yang Yo-seob Son Dong-woon | Choi Kyu-sung Yong Jun-hyung | Choi Kyu-sung | — | Non-album single | Korean | 2022 | |
| "One" (무적) | Day6 | Young K Wonpil | Jae Young K Wonpil Hong Ji-sang | Hong Ji-sang | The Book of Us: Negentropy | Korean | 2021 | |
| "Only" (둘도 아닌 하나) | Day6 | Young K | Jae Sungjin Young K Wonpil Hong Ji-sang | Hong Ji-sang | The Book of Us: Negentropy | Korean | 2021 | |
| "Ouch" (아야야) | Day6 | Young K | Young K KIME Munan Sean M. Sinclair Cho Chang-hyun | KIME Munan Sean M. Sinclair Cho Chang-hyun | The Book of Us: Entropy | Korean | 2019 | |
| "Out of My Mind" (이상하게 계속 이래) | Day6 | Jae Sungjin Lim Jun-hyeok Young K Wonpil Dowoon | Andrew Choi 220 Jae Sungjin Lim Jun-hyeok Young K Wonpil Dowoon | 220 | The Day | Korean | 2015 | |
| "Out of My Mind (Final Ver.)" (이상하게 계속 이래(Final Ver.)) | Day6 | Jae Sungjin Lim Jun-hyeok Young K Wonpil Dowoon | Andrew Choi 220 Jae Sungjin Lim Jun-hyeok Young K Wonpil Dowoon | 220 | Moonrise | Korean | 2017 | |
| "Out of The Blue (Duet with Song Heejin)" (문득 (Duet with 송희진)) | Dowoon | Dowoon Song Hee-jin | Dowoon Song Hee-jin Kevin Cho Cha Il-hoon YUE | Kevin Cho | Out of The Blue | Korean | 2021 | |

## P

| Song | Artist(s) | Writer(s) | Writer(s) | Writer(s) | Album/Single | Language | Year | Ref. |
| Song | Artist(s) | Lyrics | Composition | Arrangement | Album/Single | Language | Year | Ref. |
| "Pieces" (휴지조각) | Wonpil | Wonpil Kevin Cho | Wonpil Kevin Cho | Kevin Cho | Pilmography | Korean | 2022 | |
| "playground" | Young K | Young K | Young K Humbert paulkyte | Humbert | Letters with Notes | Korean | 2023 | |
| "Pouring" (쏟아진다) | Day6 | Young K | Hong Ji-sang Lee Woo-min Jae Sungjin Young K Wonpil | Hong Ji-sang Lee Woo-min | Every Day6 Movember | Korean | 2017 | |
| "Pouring" (쏟아진다) | Day6 | Young K | Hong Ji-sang Lee Woo-min Jae Sungjin Young K Wonpil | Hong Ji-sang Lee Woo-min | Moonrise | Korean | 2017 | |

## R

| Song | Artist(s) | Writer(s) | Writer(s) | Writer(s) | Album/Single | Language | Year | Ref. |
| Song | Artist(s) | Lyrics | Composition | Arrangement | Album/Single | Language | Year | Ref. |
| "Rescue Me" | Day6 | Young K Wonpil | Jae Wonpil FRANTS | FRANTS | The Book of Us: Entropy | Korean | 2019 | |
| "Right Through Me" (뚫고 지나가요) | Day6 (Even of Day) | Young K | Young K Wonpil Hong Ji-sang | Hong Ji-sang | Right Through Me | Korean | 2021 | |
| "Round of Applause" (환호) | Kim Young-seok Young K | Young K | Na Sang-hyun Young K | Na Sang-hyun Young K | King of Karaoke: VS SEMI FINAL | Korean | 2023 | |

## S

| Song | Artist(s) | Writer(s) | Writer(s) | Writer(s) | Album/Single | Language | Year | Ref. |
| Song | Artist(s) | Lyrics | Composition | Arrangement | Album/Single | Language | Year | Ref. |
| "Sad Ending" (나만 슬픈 엔딩) | Day6 | Sungjin Young K Wonpil Hong Ji-sang | Sungjin Wonpil Hong Ji-sang | Hong Ji-sang | Fourever | Korean | 2024 | |
| "Say Hello" | Day6 | Young K Watanabe Hajime | 220 Jae Sungjin Young K Wonpil | 220 | Unlock | Japanese | 2018 | |
| "Say Wow" | Day6 | Young K | Hong Ji-sang Young K Wonpil | Hong Ji-sang | Every Day6 April | Korean | 2017 | |
| "Say Wow" | Day6 | Young K | Hong Ji-sang Young K Wonpil | Hong Ji-sang | Sunrise | Korean | 2017 | |
| "She Smiled" (그녀가 웃었다) | Day6 | Sungjin Wonpil Hong Ji-sang | Sungjin Young K Wonpil Hong Ji-sang | Hong Ji-sang | Band Aid | Korean | 2024 | |
| "Shoot Me" | Day6 | Young K | Hong Ji-sang Lee Woo-min Jae Sungjin Young K Wonpil | Hong Ji-sang Lee Woo-min | Shoot Me: Youth Part 1 | Korean | 2018 | |
| "Shouldn't Have (Feat. Young K)" (이럴거면 그러지말지 (Feat. Young K)) | Baek A-yeon Young K | Sim Eun-jee Baek A-yeon Young K | Sim Eun-jee Baek A-yeon | Sim Eun-jee | Non-album single | Korean | 2015 | |
| "Shxtty Game" (망겜) | Day6 | Young K | Sungjin Young K Wonpil Hong Ji-sang | Hong Ji-sang | Band Aid | Korean | 2024 | |
| "Sincerity" (지우게) | Wonpil | Young K Wonpil | Wonpil Hong Ji-sang | Hong Ji-sang | Pilmography | Korean | 2022 | |
| "Sing Me" | Day6 | Young K Wonpil | Nuplay Neil Nallas Walter Pok Jae Sungjin Young K Wonpil Dowoon | Nuplay | Daydream | Korean | 2016 | |
| "Sky High (Feat. Young K)" | Park Sae-byul Like,Likes Young K | Park Sae-byul Young K | Park Sae-byul Choi Seok Toyo Lee | Choi Seok Toyo Lee | Non-album single | Korean | 2015 | |
| "Slightly Tipsy" (취기를 빌려) | Wonpil | Sae Bom | Sae Bom | — | Non-album single | Korean | 2022 | |
| "Slow (Feat. Young K)" | Big Ocean Young K | Seo Ju-won | Seo Ju-won | Seo Ju-won Bae Joon-sung | Non-album single | Korean | 2024 | |
| "So Cool" (완전 멋지잖아) | Day6 | Young K | Jae Sungjin Young K Wonpil Hong Ji-sang | Hong Ji-sang | Remember Us: Youth Part 2 | Korean | 2018 | |
| "So Let's Love" (우리 앞으로 더 사랑하자) | Day6 | Jae Young K ARTISEAN | Jae Young K atomik KIME | atomik KIME | The Book of Us: Negentropy | Korean | 2021 | |
| "So Nice (GMF2023 Ver.)" | Young K 9.10000 Lim Kim Na Sang-hyun Ryu Ji-ho Shin On-yu | Lee Won-suk | Kim Jang-won Kim Sun-il | Kwon Hyuk-ho Jeong Dong-hwan | Non-album single | Korean | 2023 | |
| "so this is love" (사랑, 이게 맞나 봐) | Day6 (Even of Day) | Young K | Young K Wonpil Hong Ji-sang | Hong Ji-sang | Non-album single | Korean | 2021 | |
| "Someday, Spring Will Come" (언젠가 봄은 찾아올 거야) | Wonpil | Wonpil | Yun Seok-cheol | Yun Seok-cheol | Pilmography | Korean | 2022 | |
| "Somehow" (어쩌다 보니) | Day6 | Young K | Hong Ji-sang Lee Woo-min Jae Sungjin Young K Wonpil | Hong Ji-sang Lee Woo-min | Shoot Me: Youth Part 1 | Korean | 2018 | |
| "song for you" (노래로) | Lim Jung-hyun Young K | Young K | Park Mun-chi Young K | Park Mun-chi | King of Karaoke: VS FINAL | Korean | 2023 | |
| "Soul (Feat. CHOILB)" | Young K CHOILB | Young K CHOILB | Young K Sim Hyun | Sim Hyun | Letters with Notes | Korean | 2023 | |
| "Still" (원하니까) | Day6 | Young K | Hong Ji-sang Lee Woo-min Jae Sungjin Young K Wonpil Dowoon | Hong Ji-sang Lee Woo-min | Shoot Me: Youth Part 1 | Korean | 2018 | |
| "Still There" (아직 거기 살아) | Day6 | Young K | Sungjin Young K Wonpil Hong Ji-sang | Hong Ji-sang | Band Aid | Korean | 2024 | |
| "Stop" (때려쳐) | Day6 | Young K | Jae Sungjin Young K Wonpil Hong Ji-sang | Hong Ji-sang | The Book of Us: The Demon | Korean | 2020 | |
| "Stop Talking" (막말) | Day6 | Young K | Jae Young K 203 Swavey Child | 203 | The Book of Us: Entropy | Korean | 2019 | |
| "Stop The Rain" | Day6 | Jae Sungjin Young K | Shinichi Ubukata Jae Sungjin Young K Wonpil Dowoon | Shinichi Ubukata | Unlock | Japanese | 2018 | |
| "Stranded" (외딴섬의 외톨이) | Wonpil | Young K Wonpil | Wonpil Hong Ji-sang | Hong Ji-sang | Pilmography | Korean | 2022 | |
| "Strange" | Young K | Young K | Park Mun-chi Young K | Park Mun-chi | Letters with Notes | Korean | 2023 | |
| "Sugar High [feat. Young K]" (ใจอ้วน [feat. Young K]) | Stamp Young K | Stamp Young K | Stamp | Pokpong Jitdee | Non-album single | Thai Korean | 2021 | |
| "Sweet Chaos" | Day6 | Young K | Jae Sungjin Young K Wonpil Hong Ji-sang | Hong Ji-sang | The Book of Us: Entropy | Korean | 2019 | |
| "Sweet Chaos (Japanese Version)" | Day6 | Young K KOMU | Jae Sungjin Young K Wonpil Hong Ji-sang | Hong Ji-sang | The Best Day2 | Japanese | 2019 | |

## T

| Song | Artist(s) | Writer(s) | Writer(s) | Writer(s) | Album/Single | Language | Year | Ref. |
| Song | Artist(s) | Lyrics | Composition | Arrangement | Album/Single | Language | Year | Ref. |
| "Talking To" (혼잣말) | Day6 | Jae Young K | Hong Ji-sang Jae Young K Wonpil | Hong Ji-sang | Shoot Me: Youth Part 1 | Korean | 2018 | |
| "Thank You Song" (땡큐송) | Day6 SSaW and Friends | Kim Jong-jin | Kim Jong-jin | Kim Jong-jin Kim Jung-woo | The Way You Keep Friendship, Vol. 1 | Korean | 2018 | |
| "Thanks To" (땡스 투) | Day6 (Even of Day) | Young K Wonpil | Young K Wonpil Hong Ji-sang | Hong Ji-sang | The Book of Us: Gluon | Korean | 2020 | |
| "The Power of Love" | Day6 | Young K | Sungjin Young K Wonpil Hong Ji-sang | Hong Ji-sang | Fourever | Korean | 2024 | |
| "Tick Tock" | Day6 | Jae Young K | Jae Sungjin Young K Wonpil Hong Ji-sang | Hong Ji-sang | The Book of Us: The Demon | Korean | 2020 | |
| "Time of Our Life" (한 페이지가 될 수 있게) | Day6 | Young K | Jae Sungjin Young K Wonpil Hong Ji-sang | Hong Ji-sang | The Book of Us: Gravity | Korean | 2019 | |
| "Time of Our Life (Japanese Version)" | Day6 | Young K Co-sho | Jae Sungjin Young K Wonpil Hong Ji-sang | Hong Ji-sang | The Best Day2 | Japanese | 2019 | |
| "To be continued -Outro- (Sung by DENIMALZ 3)" | Day6 (Even of Day) | Young K | Young K Wonpil Hong Ji-sang | Hong Ji-sang | The Book of Us: Gluon | Korean | 2020 | |

## U

| Song | Artist(s) | Writer(s) | Writer(s) | Writer(s) | Album/Single | Language | Year | Ref. |
| Song | Artist(s) | Lyrics | Composition | Arrangement | Album/Single | Language | Year | Ref. |
| "Unpainted Canvas" (그리다 보면) | Wonpil | Young K Wonpil | Wonpil Sim Hyun Oh Ji-hyun | Sim Hyun Oh Ji-hyun | Pilmography | Korean | 2022 | |

## V

| Song | Artist(s) | Writer(s) | Writer(s) | Writer(s) | Album/Single | Language | Year | Ref. |
| Song | Artist(s) | Lyrics | Composition | Arrangement | Album/Single | Language | Year | Ref. |
| "Voiceless" (안녕, 잘 가) | Wonpil | Young K Wonpil | Wonpil Hong Ji-sang | Hong Ji-sang | Pilmography | Korean | 2022 | |

## W

| Song | Artist(s) | Writer(s) | Writer(s) | Writer(s) | Album/Single | Language | Year | Ref. |
| Song | Artist(s) | Lyrics | Composition | Arrangement | Album/Single | Language | Year | Ref. |
| "waited" (오늘만을 너만을 이날을) | Young K | Young K | Young K Hong Ji-sang | Hong Ji-sang | Letters with Notes | Korean | 2023 | |
| "Walk" (역대급) | Day6 (Even of Day) | Young K | Young K Wonpil Hong Ji-sang | Hong Ji-sang | Right Through Me | Korean | 2021 | |
| "Walk With Me" (우리 더 걸을까) | Wonpil | Wonpil | Sim Hyun | Sim Hyun | Pilmography | Korean | 2022 | |
| "Wanna Go Back" (돌아갈래요) | Day6 | Young K | Jae Young K 220 | 220 | The Book of Us: Gravity | Korean | 2019 | |
| "want to love you" | Young K | Young K | Young K Jeon Da-sol | Jeon Da-sol | Eternal | Korean | 2021 | |
| "Warning!" | Day6 | Young K | Hong Ji-sang Jae Sungjin Young K Wonpil | Hong Ji-sang | Shoot Me: Youth Part 1 | Korean | 2018 | |
| "We" (우린) | Day6 (Even of Day) | Young K | Young K Wonpil Hong Ji-sang | Hong Ji-sang | Right Through Me | Korean | 2021 | |
| "Wedding Song" (축가) | J_ust Wonpil | J_ust | J_ust Jeong Su-min | J_ust Jeong Su-min | Non-album single | Korean | 2020 | |
| "Wednesday Night" | Sungjin | Sungjin D'tour | Sungjin Aaron Kim D'tour Isaac Han | Aaron Kim | 30 | Korean | 2024 | |
| "Welcome to the Show" | Day6 | Young K | Sungjin Young K Wonpil Hong Ji-sang | Hong Ji-sang | Fourever | Korean | 2024 | |
| "What a Wonderful Word" | Park Mun-chi Young K | Dvwn Park Mun-chi Young K | Dvwn Park Mun-chi Young K | Park Mun-chi | Non-album single | Korean | 2021 | |
| "What Are You Doing Now?" (너는 지금쯤) | Day6 Cha Il-hoon | Kim Jong-jin | Kim Jong-jin | Cha Il-hoon | The Way You Keep Friendship: SSaW Tribute, Vol. 4 | Korean | 2018 | |
| "What Can I Do" (좋은걸 뭐 어떡해) | Day6 | Young K | Hong Ji-sang Lee Woo-min Jae Sungjin Young K Wonpil | Hong Ji-sang Lee Woo-min | Every Day6 August | Korean | 2017 | |
| "What Can I Do" (좋은걸 뭐 어떡해) | Day6 | Young K | Hong Ji-sang Lee Woo-min Jae Sungjin Young K Wonpil | Hong Ji-sang Lee Woo-min | Moonrise | Korean | 2017 | |
| "what is.." | Young K | Young K | Young K Jeon Da-sol MOGT | Jeon Da-sol MOGT | Letters with Notes | Korean | 2023 | |
| "Whatever!" (놀래!) | Day6 | Young K | Hong Ji-sang Lee Woo-min Jae Sungjin Young K Wonpil | Hong Ji-sang Lee Woo-min | Every Day6 August | Korean | 2017 | |
| "Whatever!" (놀래!) | Day6 | Young K | Hong Ji-sang Lee Woo-min Jae Sungjin Young K Wonpil | Hong Ji-sang Lee Woo-min | Moonrise | Korean | 2017 | |
| "When You Love Someone" (그렇더라고요) | Day6 | Young K | Hong Ji-sang Lee Woo-min Jae Sungjin Young K Wonpil | Hong Ji-sang Lee Woo-min | Every Day6 October | Korean | 2017 | |
| "When You Love Someone" (그렇더라고요) | Day6 | Young K | Hong Ji-sang Lee Woo-min Jae Sungjin Young K Wonpil | Hong Ji-sang Lee Woo-min | Moonrise | Korean | 2017 | |
| "Where The Sea Sleeps" (파도가 끝나는 곳까지) | Day6 (Even of Day) | Young K | Young K Hong Ji-sang | Hong Ji-sang | The Book of Us: Gluon | Korean | 2020 | |
| "Wish" (바래) | Day6 | FRANTS Sungjin Young K Wonpil | FRANTS Sungjin Young K Wonpil | FRANTS | Daydream | Korean | 2016 | |
| "With You" | Young K | Park Seul-gi Leafie | Park Seul-gi Sun Jin-hyeok +1 | Park Seul-gi Sun Jin-hyeok | Non-album single | Korean | 2023 | |

## Y

| Song | Artist(s) | Writer(s) | Writer(s) | Writer(s) | Album/Single | Language | Year | Ref. |
| Song | Artist(s) | Lyrics | Composition | Arrangement | Album/Single | Language | Year | Ref. |
| "You make Me" | Day6 | Young K | Young K Wonpil Hong Ji-sang | Hong Ji-sang | The Book of Us: Negentropy | Korean | 2021 | |
| "You Wake Me Up" | Sungjin | Sungjin | Ming Ji-syeon Sungjin | Ming Ji-syeon | 30 | Korean | 2024 | |
| "You Were Beautiful" (예뻤어) | Day6 | Young K | Hong Ji-sang Lee Woo-min Young K Wonpil | Hong Ji-sang Lee Woo-min | Every Day6 February | Korean | 2017 | |
| "You Were Beautiful" (예뻤어) | Day6 | Young K | Hong Ji-sang Lee Woo-min Young K Wonpil | Hong Ji-sang Lee Woo-min | Sunrise | Korean | 2017 | |
| "You Were Beautiful (English Version)" | Day6 | Young K | Hong Ji-sang Lee Woo-min Young K Wonpil | Hong Ji-sang Lee Woo-min | The Best Day | English | 2018 | |
| "You Were Beautiful" (예뻤어) | Wonpil | Young K | Hong Ji-sang Lee Woo-min Young K Wonpil | — | Non-album single | Korean | 2022 | |

## Z

| Song | Artist(s) | Writer(s) | Writer(s) | Writer(s) | Album/Single | Language | Year | Ref. |
| Song | Artist(s) | Lyrics | Composition | Arrangement | Album/Single | Language | Year | Ref. |
| Zombie | Day6 | Young K Wonpil | Jae Hong Ji-sang | Hong Ji-sang | The Book of Us: The Demon | Korean | 2020 | |
| Zombie (English Ver.) | Day6 | Young K Wonpil | Jae Hong Ji-sang | Hong Ji-sang | The Book of Us: The Demon | English | 2020 | |