# List of That Time I Got Reincarnated as a Slime episodes

That Time I Got Reincarnated as a Slime is an anime television series based on the light novel series of the same title written by Fuse and illustrated by Mitz Vah. The series follows a man who dies and is reincarnated in another world as a slime named Rimuru. The anime is produced by Eight Bit and directed by Yasuhito Kikuchi, with Atsushi Nakayama as assistant director, Kazuyuki Fudeyasu handling series composition, Ryouma Ebata designing the characters, and Takahiro Kishida providing monster designs. Elements Garden is composing the series' music. The 24-episode series aired from October 2, 2018, to March 19, 2019, on Tokyo MX and other networks. The anime series is simulcast by Crunchyroll, with Funimation streaming an English dub as it airs. An original animation DVD (OAD) was originally scheduled to be released on March 29, 2019, bundled with the 11th manga volume, but it was delayed to December 4, 2019, bundled with the 13th manga volume. A second original animation DVD released on July 9, 2019, bundled with the 12th manga volume. Three more original animation DVDs have been announced, with the third OAD being released on March 27, 2020, bundled with the 14th manga volume. The fourth OAD was bundled with the 15th manga volume, which released on July 9, 2020. The fifth OADs was bundled with 16th manga volume, which released on November 11, 2020.
A second season was announced to be a split-cour anime, and the first half was scheduled to premiere in October 2020, but has been delayed to January 2021 due to COVID-19. The second half was also delayed from April to July 2021. The first half aired from January 12 to March 30, 2021, and the second half aired from July 6 to September 21, 2021. Eight Bit returned to animate the series, with the staff and cast members reprising their roles.
A spin-off anime series based on the Slime Diaries: That Time I Got Reincarnated as a Slime manga was scheduled to premiere in January 2021 but was delayed to April 2021 due to COVID-19. The series aired from April 6 to June 22, 2021. Eight Bit also animated the series, with Yuji Ikuhara directing the series, Kotatsumikan writing the scripts, Risa Takai and Atsushi Irie as character designers, and R.O.N composing the music.
A three-episode original net animation (ONA) series, titled Visions of Coleus, was announced on February 19, 2023, and premiered on November 1, 2023. The staff from the second season reprised their roles along with Toshizo Nemoto handling series composition. The opening theme song, "Hikaru Hanatsu", is performed by Takuma Terashima, while the ending theme song is performed by Miho Okasaki.
A third season was announced in November 2022 and premiered on April 5, 2024, on the Friday Anime Night programming block on Nippon TV and its affiliates, as well as BS11. The staff from the second season and the Visions of Coleus ONA series are returning to reprise their roles.
Following the airing of the third season's final episode, a fourth season was announced, along with a second film.

## Series overview

| Season | Episodes | Episodes | Originally aired | Originally aired |
| Season | Episodes | Episodes | First aired | Last aired |
| 1 | 24 | 24 | October 2, 2018 (2018-10-02) | March 19, 2019 (2019-03-19) |
| 2 | 24 | 12 | January 12, 2021 (2021-01-12) | March 30, 2021 (2021-03-30) |
| 2 | 24 | 12 | July 6, 2021 (2021-07-06) | September 21, 2021 (2021-09-21) |
| 3 | 24 | 24 | April 5, 2024 (2024-04-05) | September 27, 2024 (2024-09-27) |

## Episodes
### Season 1 (2018–19)

| No. overall | No. in season | Title | Directed by | Storyboarded by | Chief animation directed by | Original air date |
| 1 | 1 | "The Storm Dragon, Veldora" Transliteration: "Boufuu Ryuu Verudora" (Japanese: 暴風竜ヴェルドラ) | Atsushi Nakayama | Yasuhito Kikuchi | Ryōma Ebata | October 2, 2018 (2018-10-02) |
| 2 | 2 | "Meeting the Goblins" Transliteration: "Goburin-tachi to no Deai" (Japanese: ゴブリンたちとの出会い) | Shintaro Inokawa | Masashi Kojima | Ryōma Ebata | October 9, 2018 (2018-10-09) |
| 3 | 3 | "Battle at the Goblin Village" Transliteration: "Goburin Mura de no Tatakai" (Japanese: ゴブリン村での戦い) | Shin Tosaka | Takaomi Kanasaki | Junichi Takaoka | October 16, 2018 (2018-10-16) |
| 4 | 4 | "In the Kingdom of the Dwarves" Transliteration: "Dowāfu no Ōkoku Nite" (Japanese: ドワーフの王国にて) | Tokugane Tanizawa | Taizo Yoshida | Kenichirō Katsura | October 23, 2018 (2018-10-23) |
| 5 | 5 | "Hero King, Gazel Dwargo" Transliteration: "Eiyū-ō Gazeru・Dowarugo" (Japanese: 英雄王ガゼル・ドワルゴ) | Yoshihiro Mori | Junichi Takaoka | Junichi Takaoka | October 30, 2018 (2018-10-30) |
| 6 | 6 | "Shizu" (Japanese: シズ) | Yasuhiro Ito | Masashi Kojima | Kenichirō Katsura | November 6, 2018 (2018-11-06) |
| 7 | 7 | "Conqueror of Flames" Transliteration: "Bakuen no Shihai-sha" (Japanese: 爆炎の支配者) | Atsushi Nakayama | Masashi Kojima | Kenichirō Katsura | November 13, 2018 (2018-11-13) |
| 8 | 8 | "Inherited Will" Transliteration: "Uketsugareru Omoi" (Japanese: 受け継がれる想い) | Takumi Dōyama | Katsumi Terahigashi | Takashi Mamezuka | November 20, 2018 (2018-11-20) |
| 9 | 9 | "Attack of the Ogres" Transliteration: "Dai Kizoku no Shūgeki" (Japanese: 大鬼族の襲撃) | Shin Tosaka | Katsumi Terahigashi | Junichi Takaoka | November 27, 2018 (2018-11-27) |
| 10 | 10 | "The Orc Lord" Transliteration: "Ōku Rōdo" (Japanese: オークロード) | Tokugane Tanizawa | Hidetoshi Namura | Kenichirō Katsura | December 4, 2018 (2018-12-04) |
| 11 | 11 | "Gabiru Is Here!" Transliteration: "Gabiru Sanjō!" (Japanese: ガビル参上！) | Yoshifumi Sasahara | Taizo Yoshida | Takashi Mamezuka | December 11, 2018 (2018-12-11) |
| 12 | 12 | "The Gears Spin Out of Control" Transliteration: "Kuruiyuku Haguruma" (Japanese: 狂いゆく歯車) | Yoshihiro Mori | Munenori Nawa | Takashi Mamezuka & Kenichirō Katsura | December 18, 2018 (2018-12-18) |
| 13 | 13 | "The Great Clash" Transliteration: "Dai Gekitotsu" (Japanese: 大激突) | Atsushi Nakayama | Shinji Itadaki | Kenichirō Katsura | December 25, 2018 (2018-12-25) |
| 14 | 14 | "The One Who Devours All" Transliteration: "Subete o Kurau Mono" (Japanese: 全てを喰らう者) | Yasuhiro Ito | Masashi Kojima | Takashi Mamezuka | January 8, 2019 (2019-01-08) |
| 15 | 15 | "The Jura Forest Alliance" Transliteration: "Jura no Mori Dai Dōmei" (Japanese: ジュラの森大同盟) | Akira Yamada | Katsumi Terahigashi | Junichi Takaoka | January 15, 2019 (2019-01-15) |
| 16 | 16 | "Demon Lord Milim Attacks" Transliteration: "Maō Mirimu Raishū" (Japanese: 魔王ミリム来襲) | Munenori Nawa | Yasuhito Kikuchi & Masashi Kojima | Kenichirō Katsura | January 22, 2019 (2019-01-22) |
| 17 | 17 | "The Gathering" Transliteration: "Tsudōsha-tachi" (Japanese: 集う者達) | Shin Tosaka | Masashi Kojima | Junichi Takaoka | January 29, 2019 (2019-01-29) |
| 18 | 18 | "Evil Creeps Closer" Transliteration: "Shinobiyoru Akui" (Japanese: 忍び寄る悪意) | Yoshihiro Mori | Masashi Kojima & Yasuhito Kikuchi | Kenichirō Katsura | February 5, 2019 (2019-02-05) |
| 19 | 19 | "Charybdis" Transliteration: "Karyubudisu" (Japanese: 暴風大妖渦（カリュブディス）) | Atsushi Nakayama | Yasuhito Kikuchi & Risako Yoshida | Takashi Mamezuka | February 12, 2019 (2019-02-12) |
| 20 | 20 | "Yuuki Kagurazaka" (Japanese: ユウキ・カグラザカ) | Tokugane Tanizawa | Masashi Kojima | Junichi Takaoka | February 19, 2019 (2019-02-19) |
| 21 | 21 | "Shizu-san's Students" Transliteration: "Shizu-san no Oshiego-tachi" (Japanese: シズさんの教え子達) | Ōri Yasukawa | Katsumi Terahigashi | Takashi Mamezuka | February 26, 2019 (2019-02-26) |
| 22 | 22 | "Conquering the Labyrinth" Transliteration: "Meikyū kōryaku" (Japanese: 迷宮攻略) | Shige Fukase | Shinji Itadaki | Hideki Sakai | March 5, 2019 (2019-03-05) |
| 23 | 23 | "Saved Souls" Transliteration: "Sukuwareru tamashii" (Japanese: 救われる魂) | Shin Tosaka | Masashi Kojima | Junichi Takaoka | March 12, 2019 (2019-03-12) |
| 24 | 24 | "Black and a Mask" Transliteration: "Gaiden: Kuro to Kamen" (Japanese: 外伝：黒と仮面) | Munenori Nawa | Shinji Itadaki | Ryōma Ebata | March 19, 2019 (2019-03-19) |

### Season 2 (2021)

| No. overall | No. in season | Title | Directed by | Storyboarded by | Chief animation directed by | Original air date |
| Part 1 |||||||
| 25 | 1 | "Rimuru's Busy Life" Transliteration: "Rimuru no Isogashii Hibi" (Japanese: リムルの忙しい日々) | Munenori Nawa | Atsushi Nakayama & Ryōma Ebata | Tomoko Ito | January 12, 2021 (2021-01-12) |
| 26 | 2 | "Trade with the Animal Kingdom" Transliteration: "Jū Ōkoku to no Kōeki" (Japanese: 獣王国との交易) | Daisuke Eguchi | Taizo Yoshida | Keiya Nakano | January 19, 2021 (2021-01-19) |
| 27 | 3 | "Paradise, Once More" Transliteration: "Rakuen, Futatabi" (Japanese: 楽園、再び) | Shō Kitamura | Satoshi Shimizu | Hideki Sakai | January 26, 2021 (2021-01-26) |
| 28 | 4 | "The Scheming Kingdom of Falmuth" Transliteration: "Bōryaku no Farumusu Ōkoku" (Japanese: 謀略のファルムス王国) | Akira Katō | Masashi Kojima | Yūichi Tanaka | February 2, 2021 (2021-02-02) |
| 29 | 5 | "Prelude to the Disaster" Transliteration: "Saiyaku no Zensōkyoku" (Japanese: 厄災の前奏曲) | Shunji Yoshida | Taizo Yoshida | Tomoko Ito | February 9, 2021 (2021-02-09) |
| 30 | 6 | "The Beauty Makes Her Move" Transliteration: "Ugokidasu Reijin" (Japanese: 動き出す麗人) | Shunsuke Ishikawa | Satoshi Shimizu & Masashi Kojima | Keiya Nakano & Hideki Yamazaki | February 16, 2021 (2021-02-16) |
| 31 | 7 | "Despair" Transliteration: "Zetsubō" (Japanese: 絶望) | Munenori Nawa, Daishi Katō & Takahiro Tanaka | Satoshi Shimizu | Yūichi Tanaka, Tomoko Ito & Keiya Nakano | February 23, 2021 (2021-02-23) |
| 32 | 8 | "Hope" Transliteration: "Kibō" (Japanese: 希望) | Kazuto Fujiwara | Shinji Itadaki | Yūichi Tanaka, Tomoko Ito & Hideki Sakai | March 2, 2021 (2021-03-02) |
| 33 | 9 | "Putting Everything on the Line" Transliteration: "Subete o Kakete" (Japanese: 全てを賭けて) | Shigeru Fukase | Shinji Itadaki | Hideki Sakai | March 9, 2021 (2021-03-09) |
| 34 | 10 | "Megiddo" Transliteration: "Megido" (Japanese: 神之怒（メギド）) | Daisuke Eguchi | Satoshi Shimizu | Keiya Nakano & Hideki Sakai | March 16, 2021 (2021-03-16) |
| 35 | 11 | "Birth of a Demon Lord" Transliteration: "Maō Tanjō" (Japanese: 魔王誕生) | Shō Kitamura | Satoshi Shimizu | Yūichi Tanaka, Tomoko Ito & Hideki Sakai | March 23, 2021 (2021-03-23) |
| 36 | 12 | "The One Unleashed" Transliteration: "Tokihanatareshi Mono" (Japanese: 解き放たれし者) | Shunsuke Ishikawa | Satoshi Shimizu | Hideki Sakai, Keiya Nakano, Yūichi Tanaka & Tomoko Ito | March 30, 2021 (2021-03-30) |
| Part 2 |||||||
| 37 | 13 | "The Visitors" Transliteration: "Otozureru Mono-tachi" (Japanese: 訪れる者たち) | Atsushi Nakayama | Satoshi Shimizu | N/A | July 6, 2021 (2021-07-06) |
| 38 | 14 | "A Meeting of Humans and Monsters" Transliteration: "Jinma Kaidan" (Japanese: 人魔会談) | Ken Sanuma | Shinji Itadaki | Tomoko Ito | July 13, 2021 (2021-07-13) |
| 39 | 15 | "Ramiris's Warning" Transliteration: "Ramirisu no Shirase" (Japanese: ラミリスの報せ) | Ryōsuke Azuma | Masashi Kojima | Hideki Sakai, Keiya Nakano & Tomoko Ito | July 20, 2021 (2021-07-20) |
| 40 | 16 | "The Congress Dances" Transliteration: "Kaigi wa Odoru" (Japanese: 会議は踊る) | Ryō Nakamura | Masashi Kojima | Keiya Nakano, Yūichi Tanaka, Hideki Yamazaki, Hideki Sakai & Masahiko Komino | July 27, 2021 (2021-07-27) |
| 41 | 17 | "The Eve of Battle" Transliteration: "Kaisen Zen'ya" (Japanese: 会戦前夜) | Kazuto Fujiwara | Satoshi Shimizu | Keiya Nakano, Yūichi Tanaka, Hideki Yamazaki, Hideki Sakai & Masahiko Komino | August 3, 2021 (2021-08-03) |
| 42 | 18 | "The Demon Lords" Transliteration: "Maō-tachi" (Japanese: 魔王たち) | Ken Sanuma | Satoshi Shimizu | Tomoko Ito | August 10, 2021 (2021-08-10) |
| 43 | 19 | "The Signal to Begin the Banquet" Transliteration: "Kaien no Aizu" (Japanese: 開宴の合図) | Munenori Nawa | Taizo Yoshida | Keiya Nakano, Hideki Sakai, Yūichi Tanaka, Hideki Yamazaki & Masahiko Komino | August 17, 2021 (2021-08-17) |
| 44 | 20 | "On This Land Where It All Happened" Transliteration: "Innen no Chi de" (Japanese: 因縁の地で) | Shō Kitamura | Masashi Kojima | Keiya Nakano, Hideki Sakai, Yūichi Tanaka, Hideki Yamazaki & Masahiko Komino | August 24, 2021 (2021-08-24) |
| 45 | 21 | "Adalmann, the Index Finger" Transliteration: "Jishi no Adaruman" (Japanese: 示指のアダルマン) | Shigeru Fukase | Satoshi Shimizu | Hideki Sakai, Keiya Nakano, Hideki Yamazaki, Yūichi Tanaka, Masahiko Komino & Yasuhito Kikuchi | August 31, 2021 (2021-08-31) |
| 46 | 22 | "Demon Lords' Banquet: Walpurgis" Transliteration: "Maō-tachi no Utage ～Warupurugisu～" (Japanese: 魔王達の宴 〜ワルプルギス〜) | Takahiro Enokida | Satoshi Shimizu | Tomoko Ito & Hideki Yamazaki | September 7, 2021 (2021-09-07) |
| 47 | 23 | "Returning from the Brink" Transliteration: "Kishikaisei" (Japanese: 起死回生) | Munenori Nawa | Satoshi Shimizu | Hideki Sakai, Tomoko Ito, Keiya Nakano, Hideki Yamazaki, Yūichi Tanaka, Yasuhito Kikuchi & Masahiko Komino | September 14, 2021 (2021-09-14) |
| 48 | 24 | "Octagram" Transliteration: "Okutaguramu" (Japanese: 八星魔王（オクタグラム）) | Daisuke Eguchi | Satoshi Shimizu | Hideki Sakai, Tomoko Ito, Hideki Yamazaki, Keiya Nakano, Yūichi Tanaka & Masahiko Komino | September 21, 2021 (2021-09-21) |

### Season 3 (2024)

| No. overall | No. in season | Title | Directed by | Written by | Storyboarded by | Original air date |
| 49 | 1 | "Demons and Strategies" Transliteration: "Akuma to Sakubō" (Japanese: 悪魔と策謀) | Satoshi Ōsedo | Toshizo Nemoto | Masashi Kojima | April 5, 2024 (2024-04-05) |
| 50 | 2 | "The Saint's Intentions" Transliteration: "Seijin no Omowaku" (Japanese: 聖人の思惑) | Chen Xiaocan | Toshizo Nemoto | Masashi Kojima | April 12, 2024 (2024-04-12) |
| 51 | 3 | "Peaceful Days" Transliteration: "Heiwana Hibi" (Japanese: 平和な日々) | Tomio Yamauchi | Toshizo Nemoto | Shinji Itadaki | April 19, 2024 (2024-04-19) |
| 52 | 4 | "Everyone Has a Part to Play" Transliteration: "Sorezore no Yakuwari" (Japanese: それぞれの役割) | Tomio Yamauchi | Shingo Irie | Taizo Yoshida | April 26, 2024 (2024-04-26) |
| 53 | 5 | "Meeting of Both Sides" Transliteration: "Ryōyoku Kaigi" (Japanese: 両翼会議) | Masaharu Tomoda | Okumura Junichirō | Masashi Kojima | May 3, 2024 (2024-05-03) |
| 54 | 6 | "Those Approaching" Transliteration: "Semari Kuru Mono-tachi" (Japanese: 迫り来る者達) | Chen Xiaocan | Toshizo Nemoto | Shinji Itadaki | May 10, 2024 (2024-05-10) |
| 55 | 7 | "Saint and Demon Clash" Transliteration: "Seima Gekitotsu" (Japanese: 聖魔激突) | Satoshi Ōsedo | Shingo Irie | Satoshi Ōsedo & Hideki Yamazaki | May 17, 2024 (2024-05-17) |
| 56 | 8 | "Misunderstanding" Transliteration: "Botan no Kake Chigai" (Japanese: ボタンのかけ違い) | Yasushi Muroya | Okumura Junichirō | Satoshi Shimizu | May 24, 2024 (2024-05-24) |
| 57 | 9 | "The Scheming of the Seven Days" Transliteration: "Shichiyō Anyaku" (Japanese: 七曜暗躍) | Masahiko Suzuki | Tatsuto Higuchi | Ken Ōtsuka | May 31, 2024 (2024-05-31) |
| 58 | 10 | "God and Demon Lord" Transliteration: "Kami to Maō" (Japanese: 神と魔王) | Daisuke Tsukushi | Toshizo Nemoto | Kenta Mimuro | June 7, 2024 (2024-06-07) |
| 59 | 11 | "Reconciliation and Agreement" Transliteration: "Wakai to Kyōtei" (Japanese: 和解と協定) | Naokatsu Tsuda & Neito Hirohara | Toshizo Nemoto | Masashi Kojima | June 14, 2024 (2024-06-14) |
| 60 | 12 | "Festival Preparations" Transliteration: "Kaisai Junbi" (Japanese: 開催準備) | Takaaki Wada | Shingo Irie | Takaaki Wada | June 21, 2024 (2024-06-21) |
| 61 | 13 | "Invitations for All Nations" Transliteration: "Kakkoku to Shōtaijō" (Japanese: 各国と招待状) | Yasushi Muroya | Okumura Junichirō | Yasushi Muroya | June 28, 2024 (2024-06-28) |
| 62 | 14 | "Labyrinth and Storm Dragon" Transliteration: "Meikyū to Bōfū Ryū" (Japanese: 迷宮と暴風竜) | Chen Xiaocan | Tatsuto Higuchi | Gō Kurosaki | July 5, 2024 (2024-07-05) |
| 63 | 15 | "Audience" Transliteration: "Ekkenshiki" (Japanese: 謁見式) | Satoshi Ōsedo | Toshizo Nemoto | Satoshi Shimizu | July 19, 2024 (2024-07-19) |
| 64 | 16 | "Benimaru's Ordeal" Transliteration: "Benimaru no Junan" (Japanese: ベニマルの受難) | Daisuke Tsukushi | Shingo Irie | Daisuke Tsukushi | July 26, 2024 (2024-07-26) |
| 65 | 17 | "The Lightspeed Hero" Transliteration: "Senkō no Yūsha" (Japanese: 閃光の勇者) | Hitomi Ezoe | Tatsuto Higuchi | Futoshi Higashide | August 2, 2024 (2024-08-02) |
| 66 | 18 | "A Throng of Visitors" Transliteration: "Senkyaku Banrai" (Japanese: 千客万来) | Migmi | Okumura Junichirō | Chihiro Nitta | August 16, 2024 (2024-08-16) |
| 67 | 19 | "Festival Eve" Transliteration: "Zen'yasai" (Japanese: 前夜祭) | Atsushi Nakayama | Toshizo Nemoto | Chihiro Nitta | August 23, 2024 (2024-08-23) |
| 68 | 20 | "Nation's Opening Festival" Transliteration: "Kaikoku-sai" (Japanese: 開国祭) | Satoshi Ōsedo | Shingo Irie | Chihiro Nitta & Kiyoshi Okuyama | August 30, 2024 (2024-08-30) |
| 69 | 21 | "The Martial Arts Tournament" Transliteration: "Butō Taikai" (Japanese: 武闘大会) | Yasushi Muroya | Tatsuto Higuchi | Ken Ōtsuka | September 6, 2024 (2024-09-06) |
| 70 | 22 | "Settling the Score with the Hero" Transliteration: "Yūsha to no Ketchaku" (Japanese: 勇者との決着) | Natsumi Suzuki | Okumura Junichirō | Masashi Kojima | September 13, 2024 (2024-09-13) |
| 71 | 23 | "The Labyrinth Is Opened" Transliteration: "Meikyū Kaihō" (Japanese: 迷宮開放) | Naokatsu Tsuda | Shingo Irie | Naokatsu Tsuda & Neito Hirohara | September 20, 2024 (2024-09-20) |
| 72 | 24 | "After the Festival" Transliteration: "Matsuri no Ato" (Japanese: 祭の後) | Daisuke Tsukushi | Tatsuto Higuchi | Masashi Kojima | September 27, 2024 (2024-09-27) |

## The Slime Diaries (2021)

A more light hearted series showing the day-to-day lives of those in Tempest; taking place in the gaps between major events.
| No. | Title | Directed by | Storyboarded by | Chief animation directed by | Original air date |
| 1 | "The Residents of the City of Monsters" Transliteration: "Mamono no Machi no Jūnin-tachi" (Japanese: 魔物の町の住人たち) | Shintaro Inokawa | Yūji Haibara & Shintaro Inokawa | Atsushi Irie & Kazuaki Morita | April 6, 2021 (2021-04-06) |
| Rimuru decides to keep a diary of the adventures experienced in this new world, remembering the trials and the friends made along the way. With the monster city growing, Rimuru and the council hold a meeting to help bring up everyone's morale. The Oni, Orcs, and Dragonewts enjoy their new lives under Rimuru's leadership. ||||||
| 2 | "The Air in Spring and..." Transliteration: "Haru no Kūki to" (Japanese: 春の空気と) | Kōsuke Hirota | Shintaro Inokawa, Lone Claire & Akihiro Ino | Atsushi Irie & Kazuaki Morita | April 13, 2021 (2021-04-13) |
| Rimuru gets to enjoy a rare break from work in Rimuru City, but quickly returns to old duties as boredom sets in. The inhabitants plough the fields and plant crops, including rice, to improve the city's food variety and production. Geld learns to appreciate the value of the less physically demanding gardening jobs, while Dryad Treyni is upset she didn't get invited to participate in the seeding. ||||||
| 3 | "Summer in Jura" Transliteration: "Jura no Natsu" (Japanese: ジュラの夏) | Shin Tosaka & Hiroshi Tamada | Shintaro Inokawa & Shin Tosaka | Atsushi Irie & Kazuaki Morita | April 20, 2021 (2021-04-20) |
| As summer arrives, its heat is causing exhaustion among the city's working population. To cool down, Rimuru enjoys some activities in the forest with a group of Hobgoblins, including bug-catching and a water fight. Back in the city, Benimaru takes part in an endurance contest to see who can best take the heat, but is taken out by Shion's cooking. Later in the evening, Rimuru enjoys a refreshing drink in Treyni's bar before heading to a lake lit up by fireflies. ||||||
| 4 | "A Day in a Swimsuit" Transliteration: "Mizugi de Ichinichi" (Japanese: 水着で一日) | Yūsuke Yamamoto | Yūsuke Yamamoto | Atsushi Irie & Kazuaki Morita | April 27, 2021 (2021-04-27) |
| Accompanied by the Kijin, Gobta, Ranga, and Souka, Rimuru takes some time off at the beach. Shion and Shuna enjoy games on the beach with Rimuru, while Hakurou spends his time fishing with Gobta. Treyni and Gabiru are disappointed they weren't taken along, but Treyni joins the group anyway under the pretense of an inspection. Souka and Souei confide in their friends about their relationship with each other. ||||||
| 5 | "Return of the Summer Festival" Transliteration: "Saigen Natsu Matsuri" (Japanese: 再現ナツマツリ) | Shin Tosaka | Shin Tosaka & Satoshi Shimizu | Atsushi Irie, Kazuaki Morita, Hideki Yamazaki & Risa Takai | May 4, 2021 (2021-05-04) |
| Preparations are made for a Japanese-style summer festival in Tempest. Rimuru is creeped out by the usage of masks in his likeness, but is delighted, along with everyone else, with both the food served and games played at the stalls. The festival ends with a dance performance by the Dragonewts, a parade featuring Rimuru, and a fireworks show. ||||||
| 6 | "Changes" Transliteration: "Utsuroikawaru" (Japanese: うつろいかわる) | Shige Fukase | Masashi Kojima | Miyuki Nakayama | May 11, 2021 (2021-05-11) |
| As the spirit of Shizu enters the village, the Bon Festival is announced, a festival to connect with your own kin and ancestors. Many townsfolk reminisce about the past. A number of changes that the Kijin have undergone after their evolution are highlighted. Shizu is embarrassed by both people's memories of her, and the outfits worn by Rimuru in the human form that resembles her. ||||||
| 7 | "Here Comes the Demon Lord!" Transliteration: "Maō ga Kita!" (Japanese: 魔王が来た！) | Shintaro Inokawa | Tomomi Mochizuki | Yūichi Tanaka & Keiya Nakano | May 18, 2021 (2021-05-18) |
| Milim writes her own diary entry. After enjoying some food with Rimuru and the Kijin, she runs into Ranga and Gobta in town before returning for more snacks. To learn about the simple pleasantries in life, she watches Geld do construction work. In the evening, she rests while being carried on Rimuru's back, who has to repair the damage Milim's caused with her reckless behavior. ||||||
| 8 | "A Fruitful Autumn" Transliteration: "Minori no Aki" (Japanese: みのりの秋) | Kazuo Miyake | Shin Tosaka, Matsuo Youko & Takayuki Tanaka | Atsushi Irie, Kazuaki Morita & Risa Takai | May 25, 2021 (2021-05-25) |
| Autumn arrives, and the citizens, supervised by Ririna, work together to harvest the crops planted in spring. Shion and Milim have potato-harvesting contests, while Treyni shows great fondness for the tubers, revealing she was born from a potato. The harvesters all enjoy their roasted sweet potatoes and gathered fruit. Treyni makes off with a supply of potatoes, planning to fry them and serve them at her bar. ||||||
| 9 | "The Arrival of Winter" Transliteration: "Fuyu no Otozure" (Japanese: 冬のおとずれ) | Ryō Nakamura | Masashi Kojima | Yukiyo Komito & Atsushi Irie | June 1, 2021 (2021-06-01) |
| Winter is around the corner, so as the temperature drops, Milim finds enjoyment in resting under a kotatsu. Shuna prepares for winter by handing out personalised clothes to Rimuru and Benimaru. A delegation from Blumund makes their way to Rimuru City meeting Youm's party along the way, but they are mostly interested in Tempest's meat and potato chips. Youm tries to get used to the differences between monsters and humans. ||||||
| 10 | "Snow Blankets the City of Monsters" Transliteration: "Mamono no Machi no Yukigeshō" (Japanese: 魔物の町の雪化粧) | Noriyoshi Sasaki | Satoshi Shimizu & Masashi Kojima | Atsushi Irie, Kazuaki Morita & Risa Takai | June 8, 2021 (2021-06-08) |
| Tempest sees its first snow, and a team is assembled to shovel the city's streets. After a snowball fight, Milim builds a Kamakura shaped like Rimuru where they eat sweets with some of the town's children. To warm up, Rimuru enjoys a hot spring bath built by Souei, accompanied by Shion, Shuna, Milim and Eren. ||||||
| 11 | "Where Is Santa Claus?" Transliteration: "Santa Kurōsu wa Doko ni Iru" (Japanese: サンタクロースはどこにいる) | Kazuo Miyake & Munenori Nawa | Masashi Kojima & Shin Tosaka | Atsushi Irie & Kazuaki Morita | June 15, 2021 (2021-06-15) |
| Rimuru introduces Santa Claus to Tempest and has the dwarves help him set up a Christmas festival, complete with a tree and Santa outfits. Together with Milim, they get to enjoy a fancy Christmas dinner. Eren performs a Christmas song on stage with the children's choir. At the gift exchange, Rimuru is the intended recipient for many of the city's presents. ||||||
| 12 | "Enjoying New Year's to the Fullest" Transliteration: "Shōgatsu o Mankitsu" (Japanese: 正月を満喫) | Shigeru Fukase | Tomomi Mochizuki & Shintaro Inokawa | Atsushi Irie, Risa Takai & Kazuaki Morita | June 22, 2021 (2021-06-22) |
| Festivities are held around the Japanese New Year. Rimuru performs an act of worship at the first shrine visit before learning that Rimuru is himself the deity revered at the shrine. A body double is left at the shrine to greet the line of visitors. Geld, Kurobe and three Hobgoblins form a team to make mochi, while Shion can barely enjoy dinner with the Kijin after losing to Milim in badminton and having her face inked black as punishment. ||||||

## Visions of Coleus (2023)

A three episode-OVA that takes place between seasons 1 and 2.
| No. | Title | Directed by | Storyboarded by | Chief animation directed by | Original release date |
| 1 | "To Coleus" Transliteration: "Koriusu Koku e" (Japanese: コリウス国へ) | Daisuke Tsukushi | Masashi Kojima | Tomoko Ito | November 1, 2023 (2023-11-01) |
| Yuuki asks Rimuru to investigate the Kingdom of Coleus, where a battle for succession has pitted the kingdom's two princes against each other. Rimuru launches a covert operation to sneak into Coleus and find out what's driving this conflict. ||||||
| 2 | "Great Phantom Thief Satoru" Transliteration: "Dai Kaitō Satoru" (Japanese: 大怪盗サトル) | Michita Shiraishi | Satoshi Shimizu | Tomoko Ito & Sinomin | November 1, 2023 (2023-11-01) |
| Aslan visits Rimuru to thank him for saving his sister, Zenobia. They discuss her illness and Souther's behavior, and begin to suspect that the court physician, Gustav, is behind both. Rimuru dons yet another disguise to investigate further. ||||||
| 3 | "Purple and Roses" Transliteration: "Murasaki to Bara" (Japanese: 紫と薔薇) | Daisuke Tsukushi | Ken Ōtsuka | Tomoko Mori | November 1, 2023 (2023-11-01) |
| Rimuru confirms that it was Gustav who cursed Zenobia with illness. It turns out he and his accomplice, Carl, are Archdemons plotting to manifest their god using Zenobia as a vessel. Can Rimuru stop them before the Kingdom of Coleus is lost? ||||||

## OADs (2019–20)

The first two OADs take place in between the major events and the others take place between season 1 and the OVA season.
| No. | Title | Directed by | Storyboarded by | Chief animation directed by | Original release date |
| 1 | "The Tragedy of M?" Transliteration: "Gaiden: Emu no Higeki?" (Japanese: 外伝：Mの悲劇？) | Shintaro Inokawa | Masashi Kojima | Takashi Mamezuka | July 9, 2019 (2019-07-09) |
| Sick of Shion and Shuna's tug-a-war for his attention, Rimuru decides to make a cushion in his image. Acquiring spandex for the exterior, Rimuru is stumped on a substitute for Styrofoam pellets. Learning of a special sand that's similar, Rimuru takes a group to a lake to collect it. After avoiding Shion's cooking, Rimuru leads everyone in a swim to collect the sand. They are attacked by a monster that was driven insane by a rice ball Shion made; its slime dissolves everyone's swimsuits, and Rimuru settles the problem. Despite the success of the Rimuru cushions, Shion and Shuna continue Rimuru's tortuous tug-a-war; Benimaru and Souei can only pity their master. ||||||
| 2 | "Hey! Butts!" Transliteration: "Gaiden: Hē! Shiri!" (Japanese: 外伝：HEY！尻！) | Makoto Nakata | Taizo Yoshida | Takashi Mamezuka | December 4, 2019 (2019-12-04) |
| Rimuru teaches the citizens of Tempest about sumo wrestling. ||||||
| 3 | "Rimuru's Glamorous Life as a Teacher, Part 1" Transliteration: "Gaiden: Rimuru no Karei na Kyōshi Seikatsu Sono 1" (Japanese: 外伝：リムルの華麗な教師生活 その1) | Atsushi Nakayama | Taizo Yoshida | Hideki Sakai | March 26, 2020 (2020-03-26) |
| Rimuru, who is teaching Shizu's students as a substitute at the Kingdom of Ingrassia's Freedom Academy, takes part in an orientation in actual field combat in the school's annual outdoor training event. Transfixed by the prize he gets if he wins, he accepts a challenge from the teacher Jeff. However, an enemy appears before the students... ||||||
| 4 | "Rimuru's Glamorous Life as a Teacher, Part 2" Transliteration: "Gaiden: Rimuru no Karei na Kyōshi Seikatsu Sono 2" (Japanese: 外伝：リムルの華麗な教師生活 その2) | Shige Fukase | Shinji Itadaki | Hideki Sakai | July 9, 2020 (2020-07-09) |
| Rimuru, now a teacher at the Freedom Academy in the Kingdom of Ingrassia, has become involved in the school's outdoor training event with his class. The outdoor training event is an annual competition in which the students of each class guard the teachers on a journey to a nearby town. Rimuru is assigned to Class A, while his own students in Class S escort the young Tiss-sensei. All the students are eager to show how much their daily training has paid off, but the situation turns around when they're attacked by thieves! ||||||
| 5 | "Rimuru's Glamorous Life as a Teacher, Part 3" Transliteration: "Gaiden: Rimuru no Karei na Kyōshi Seikatsu Sono 3" (Japanese: 外伝：リムルの華麗な教師生活 その3) | Ōri Yasukawa | Shinji Itadaki | Tomoko Ito, Keiya Nakano & Hideki Sakai | November 27, 2020 (2020-11-27) |
| Tiss and the Class S students have made it through the first exercise of the Freedom Academy's annual outdoor training event. Class S has arrived first at the destination, the mansion of Count Guratol, and now they're ready to begin the second exercise, a cave exploration... but awaiting them there are thieves (the same ones that Rimuru encountered earlier) who hope to kidnap the students and make a fortune returning them for ransom money. Just when it seems like Rimuru's students have fought them off thanks to the skills he taught them, they realize a monster is lurking among the thieves: a Spectre! It is too strong for them, but they are saved by Kuro. ||||||