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I've Been Killing Slimes for 300 Years and Maxed Out My Level (スライム倒して300年、知らないうちにレベルMAXになってました, Suraimu Taoshite 300-nen, Shiranai Uchi ni Reberu Makkusu ni Nattemashita) is a Japanese light novel series written by Kisetsu Morita and illustrated by Benio. It was serialized online in 2016 on the user-generated novel publishing website Shōsetsuka ni Narō and, in the following year, it was acquired by SB Creative, who published the first light novel volume in 2017. The light novel has been licensed in North America by Yen Press, which published the first volume in April 2018. It received a manga adaptation by Yūsuke Shiba in the same year as its debut as the light novel on Square Enix's Gangan Online website, also licensed by Yen Press. An anime television series adaptation by Revoroot aired from April to June 2021. A second season has been announced. The series has also spawned various spin-off novels.

Slime Taoshite 300-nen, Shiranai Uchi ni Level Max ni Nattemashita has been published in English as I've Been Killing Slimes for 300 Years and Maxed Out My Level by Yen Press under the Yen On imprint since April 24, 2018.

Slime Taoshite 300-nen, Shiranai Uchi ni Level Max ni Nattemashita has been published in English as I've Been Killing Slimes for 300 Years and Maxed Out My Level by Yen Press since January 28, 2020.

I've Been Killing Slimes for 300 Years and Maxed Out My Level Logo.webp


Originally, the work that the author posted to "Become a Novelist" was a hobby. Later, it was made into a book by GA Novel (SB Creative), and after that, the serialization in "Let's become a novelist" continued until November 18, 2021 (19 volumes) in parallel with the book, but since then. Is integrated into a book. In addition, it is chemicalized on the Web and the application " Gangan ONLINE " (Square Enix) by Yusuke Shiba's drawing. In addition, TV animation has been produced since 2021.

It was decided to make a book on GA Novel on November 14, 2016. Comical is decided on April 4, 2017. A spin-off series was decided on June 29,  and a drama CD was announced on July 11. The official page of GA Novel was set up on August 19. On October 19, 2019, the decision to make it into a TV animation was announced.

As of April 2021, a total of 6 drama CDs have been released. In addition, a total of four spin-offs have been written. As a general rule, each spin-off of the second part published on each Square Enix website and application consisted of 6 episodes at the time of serialization and was included in the main volume book (only "Hira Official Doing 1500 Years", It was greatly revised and made into a book according to the comicalize). In addition, a short spin-off was serialized in "Become a Novelist" along with the results of the Twitter survey. A total of three comicalize works have been announced, including the main story and two spin-offs. In comicalize, the story of the original manga artist is also developed.


As mentioned above, counting the sequels as one, a total of four spin-offs have been written. Each Square Enix website and app has a spin-off of the three works. In addition, two short spin-offs are written in "Become a Novelist". Furthermore, it is written in a newly written form after the 18th volume of the main volume.

"In 1500, when I was a Hira official, I was made a minister by the power of the Demon King. "(Gangan GA)”, recorded at the end of Volumes 5 to 7 of the main volume, and then comicalized on the Web and the app" Gangan ONLINE (Gangan GA). Was also released as a book by GA Novel with a large amount of new writing. After that, the new episode 13 was newly written and published at the end of the 20th volume of the main volume.

" Elf's Rice" was serialized simultaneously on the Web and the app "Gangan ONLINE (Gangan GA)" and the app "Manga UP!", and was recorded in Volumes 8 to 10 of the main volume.

"Red Dragon Jogakuin" (Red Dragon Jogakuin) was serialized in the app "Manga UP!", and was recorded at the end of Volumes 11 to 13 of the main volume, and then "Manga". It is comicalized in "UP!". In addition, as a result of a questionnaire on Twitter, the sequel to "Become a Novelist", the sequel, "The Suffering of the New Student Organization" (Dainawa His Shinsei Seito Kai no Junan) was serialized in advance. , Recorded in Volume 16 of the main story. After the 8th episode, which is the sequel, it was newly written and serialized at the end of the 18th to 19th volumes of the main volume.

Although one episode of "Margrave 's Pure White Journey" (Henkyo Haku no Mashiro Tabi) "Automatic Sparta Education for Margrave Masters" (Margrave Shoji Doki Sparta Kyoiku) lost the questionnaire on Twitter, Since there was no big difference in the number of votes, it was serialized in "Become a Novelist" following "The Sparta of the New Student Organization" and was recorded in Volume 17 of the main volume.


After living a painful life as an office worker, Azusa ended her short life by dying from overworking. So when she found herself reincarnated as an undying, unaging witch in a new world, she vows to spend her day's stress-free and as pleasantly as possible. She ekes out a living by hunting down the easiest targets - the slimes! But after centuries of doing this simple job, she's ended up with insane will she maintain her low-key life now?!


Light novels

Originally, the series was published by Kisetsu Morita on the user-generated web novel site Shōsetsuka ni Narō in 2016. The publisher SB Creative acquired the series and then began publishing it on their GA Novel imprint as a light novel in January 2017. Twenty volumes have been released as of April 2022.

No. Original release date Original ISBN English release date English ISBN
01 January 14, 2017 978-4-7973-9044-5 April 24, 2018 978-0-3164-4828-4
02 April 15, 2017 978-4-7973-9176-3 August 21, 2018 978-0-3164-4830-7
03 July 15, 2017 978-4-7973-9295-1 December 11, 2018 978-1-9753-2937-2
04 October 13, 2017 978-4-7973-9296-8 April 23, 2019 978-1-9753-8264-3
05 January 15, 2018 978-4-7973-9297-5

978-4-7973-9298-2 (special edition)

September 3, 2019 978-1-9753-8266-7
06 April 13, 2018 978-4-7973-9617-1 December 24, 2019 978-1-9753-8268-1
07 July 14, 2018 978-4-7973-9619-5

978-4-7973-9618-8 (special edition)

June 23, 2020 978-1-9753-1292-3
08 November 15, 2018 978-4-7973-9913-4 October 27, 2020 978-1-9753-1482-8
09 March 15, 2019 978-4-8156-0096-9

978-4-8156-0097-6 (special edition)

January 19, 2021 978-1-9753-1834-5
10 August 09, 2019 978-4-8156-0274-1 August 24, 2021 978-1-9753-1835-2
11 December 12, 2019 978-4-8156-0275-8 January 18, 2022 978-1-9753-3979-1
12 April 14, 2020 978-4-8156-0559-9

978-4-8156-0276-5 (special edition)

May 17, 2022 978-1-9753-4053-7
13 July 14, 2020 978-4-8156-0705-0 September 20, 2022 978-1-9753-4055-1
14 October 14, 2020 978-4-8156-0651-0

978-4-8156-0650-3 (special edition)

15 January 14, 2021 978-4-8156-0706-7
16 April 13, 2021 978-4-8156-0708-1

978-4-8156-0707-4 (special edition)

17 June 12, 2021 978-4-8156-1090-6
18 September 14, 2021 978-4-8156-1091-3
19 December 14, 2021 978-4-8156-1347-1
20 April 14, 2022 978-4-8156-1393-8

In the volumes, 5 to 7, and 20 of the light novel, a special story about the character Beelzebub was published at the end of those volumes. In September 2019, those stories were compiled into their volume and the spin-off, called I Was a Bottom-Tier Bureaucrat for 1,500 Years, and the Demon King Made Me a Minister (ヒラ役人やって1500年、魔王の力で大臣にされちゃいました, Hira Yakunin Yatte 1500-nen, Maō no Chikara de Daijin ni Sarechaimashita), published by SB Creative on the GA Novel imprint with Kisetsu Morita and Benio as the author and illustrator, respectively.

No. Original release date Original ISBN English release date English ISBN
September 13, 2019 978-4-8156-0116-4 March 30, 2021 978-1-9753-1829-1

In the volumes 8 to 10 of the light novel, another spin-off light novel called Food for an Elf (Japanese: エルフのごはん, Hepburn: Erufu no Gohan), a special story about the character Halkara was published at the end of those volumes.

In the volumes 11 to 13, 16, and 18 to 19 of the light novel, another spin-off light novel called Red Dragon Women A' (レッドドラゴン女学院, Reddo Doragon Jogakuin, lit. Red Dragon Girls' Secondary School) a special story about the character Laika was published at the end of those volumes.

In volume 17 of the light novel, another spin-off light novel called The White Journey of Margrave' (Japanese: 辺境伯の真っ白旅, Hepburn: Henkyōhaku no Masshiro Tabi), a special story about the character Wynona was published at the end of that volume.


In June 2017, Square Enix began publishing a manga adaptation of the series by Yūsuke Shiba in their online website and smartphone app Gangan Online, with ten tankōbon volumes released as of November 2021.

No. Original release date Original ISBN English release date English ISBN
1 January 12, 2018 978-4-7575-5582-2 January 28, 2020 978-1-9753-3302-7
2 June 22, 2018 978-4-7575-5751-2 May 26, 2020 978-1-9753-0917-6
3 November 13, 2018 978-4-7575-5912-7 October 10, 2020 978-1-9753-0920-6
4 April 12, 2019 978-4-7575-6085-7 February 9, 2021 978-1-9753-0923-7
5 September 12, 2019 978-4-7575-6286-8 March 9, 2021 978-1-9753-1752-2
6 February 12, 2020 978-4-7575-6502-9 June 22, 2021 978-1-9753-1793-5
7 September 12, 2020 978-4-7575-6749-8 December 14, 2021 978-1-9753-3577-9
8 March 12, 2021 978-4-7575-7122-8

978-4-7575-7123-5 (special edition)

April 26, 2022 978-1-9753-4068-1
9 June 11, 2021 978-4-7575-7321-5 July 19, 2022 978-1-9753-4735-2
10 December 10, 2021 978-4-7575-7630-8

A manga adaptation of the spin-off light novel I Was a Bottom-Tier Bureaucrat for 1,500 Years, and the Demon King Made Me a Minister' was launched on Square Enix's Gangan Online website and smartphone app, with Meishi Murakami reprising his work.

No. Original release date Original ISBN English release date English ISBN
1 September 12, 2019 978-4-7575-6287-5 April 20, 2021 978-1-9753-2410-0
2 February 12, 2020 978-4-7575-6503-6 December 28, 2021 978-1-9753-2412-4
3 September 12, 2020 978-4-7575-6750-4 April 26, 2022 978-1-9753-3805-3

A manga adaptation of the spin-off light novel Red Dragon Women Academy was launched on Square Enix's Manga UP! smartphone app, with Hitsujibako reprising his work.

No. Original release date Original ISBN English release date English ISBN
1 December 10, 2021 978-4-7575-7631-5


An anime television series adaptation was announced during a livestream for the "GA Fes 2019" event on October 19, 2019. The series is animated by Revoroot and directed by Nobukage Kimura, with Tatsuya Takahashi handling the series' composition, Keisuke Goto designing the characters, and Keiji Inai composing the series' music. The series aired from April 10 to June 26, 2021, on AT-X, Tokyo MX, and BS11. Aoi Yūki performed the opening theme song "Gudafuwa every day" (ぐだふわエブリデー, Gudafuwa Eburidē, lit. Gudaguda and fluffy every day), while Azumi Waki performed the ending theme song "Viewtiful Days!". Crunchyroll licensed the series outside of Asia. In Southeast Asia and South Asia, Muse Communication licensed the series and will stream it on iQIYI, Bilibili, CATCHPLAY+, and other platforms. The company also has licensed the anime to Animax Asia for TV broadcasts.

In January 2022, it was announced that a second season was green-lit.


  • Original- Kisetsu Morita
  • Character draft-Keino
  • Director-Nobukei Kimura
  • Assistant Director-Nanase Tomii
  • Series composition- Tatsuya Takahashi
  • Character design-Keisuke Goto
  • Sub-character design-Emi Honda
  • Prop Design-Atsushi Kashiwa
  • Art Director-Ken Naito
  • Art Design-Chihiro Ido
  • Color design-Satoshi Takezawa
  • Cinematographer-Sota Mikami
  • Edit --Hiroshi Okuda
  • Music- Keiji Inai
  • Music production- Nippon Columbia
  • Sound Director- Satoshi Motoyama
  • Sound production- Studio Mausu
  • Producers-Daichi Amano, Mitsuhiro Minamihara, Noriyuki Akita, Tomoyuki Owada, Yutaka Kashiwagi, Soji Miyagi, Yoshinori Hasegawa, Atsushi Morita, Yuichi Izumi, Takumi Ito, Shota Komatsu
  • Animation Producer-Kazuki Enami
  • Animation production --REVOROOT
  • Production --Kogen no Ie (Nippon Columbia, Hakuhodo DY Music & Pictures, SB Creative BS11 STUDIO MAUSU, AT -X, KlockWorx, Movic, DMM GAMES, Bushiroad, Medicos Entertainment, Square Enix)

Theme song:

"Gudafuwa Everyday" The first opening theme by Aoi Yuki. The lyrics are by the OSTER project, and the composition and arrangement are by Shinji Ryoki.
"Viewtiful Days!" The first ending theme by Azumi Waki. The lyrics are by Ryuji Sakai, and the composition and arrangement are by Yusuke Mochida.
"Thank you" The first song in the drama is by Kuku (Kotori Koiwai). The lyrics are Kisetsu Morita and Uyu, and the composition and arrangement are Ryudai Abe.
No. Title  Directed by  Written by  Original air date 
Special "Special Program Just Before Broadcast"
Transcription: "Hōsō Chokuzen Tokuban" (Japanese: 放送直前特番)
Taku Sawada N/A April 4, 2021
1 "I Maxed Out My Level"
Transcription: "Reberu Makkusu ni Natteita" (Japanese: レベルMAXになっていた)
Nobukage Kimura Tatsuya Takahashi April 10, 2021
Aizawa Azusa accidentally works herself to death at 27 years old. A sympathetic Goddess reincarnates her as an immortal witch in a new world. Azusa is determined to live a peaceful life, building a farm in the mountains and hunting slimes every day to pass the time. 300 years pass and she becomes known as the Witch of the Highlands due to her medicinal knowledge. On a whim, she has the adventurer’s guild measure her powers and finds the experience of killing multiple slimes every day for 300 years is equal to defeating 4380 dragons and she is now the strongest adventurer in the entire world. Soon her carefree life is repeatedly interrupted by challengers, including Laika, a legendary dragon, who challenges her and is defeated, though accidentally destroying Azusa’s house. Laika returns in the form of a young girl, hands over her treasure hoard to repair Azusa’s home, and asks to become Azusa’s pupil. Hoping it may make her life easier in the long run Azusa accepts Laika as her pupil/maid, deciding to show her that a little daily effort can go a long way, starting with building them a bigger house to live in.
2 "Along Came the Girl"
Transcription: "Musume ga Kita" (Japanese: 娘が来た)
Nanase Tomii Yutaka Yasunaga April 17, 2021
Azusa is watched by a girl who swears revenge. Laika reveals attacks by villains and monsters are likely to increase now people know Azusa is strong, so they place a magic barrier around Flatta village. A child, Falfa, claims her sister, Shalsha, is trying to kill Azusa, and that Azusa is their mother. Azusa learns the sisters are 50-year-old Slime Spirits formed from the souls of every slime Azusa has killed, and while Falfa considers Azusa their mother, Shalsha wants revenge for the slimes. Azusa’s magic is useless as Shalsha reveals she trained for 50 years to perfect her Smite Evil spell against Azusa. Laika protects Azusa and easily defeats Shalsha. Falfa explains that because Shalsha only trained Smite Evil to defeat Azusa, she is defenseless against everything else and that Shalsha won’t be able to use it again for at least another 50 years. Forced to give up her grudge Shalsha decides to live happily. Azusa decides to become their mother and invites them to live with her. Shalsha agrees Azusa can keep killing slimes, but only the white ones are evil. Azusa decides life with a dragon pupil and slime daughters can be peaceful too.
3 "Along Came an Elf"
Transcription: "Erufu ga Kita" (Japanese: エルフが来た)
Ryūta Imaizumi
Yoshiyuki Kumeda
Naohiro Fukushima April 24, 2021
Halkara, an elf girl, appears at Azusa’s home seeking help against the demon Beelzebub. She explains she created Nutri-Spirit, an energy drink, but it made Beelzebub ill so she fled to avoid punishment. Azusa agrees to take Halkara as her student and puts a barrier around her house. While gathering mushrooms Halkara carelessly eats one that has aphrodisiac effects and tries to seduce Azusa who punishes her. Azusa realizes Beelzebub, the Lord of the Flies, has been in the house disguised as a housefly the whole time. Azusa challenges her to a duel, during which Beelzebub flies into the barrier and passes out from shock. Azusa helps her recover, during which Beelzebub explains the Nutri-spirit didn’t make her sick; it actually gave her the energy to work all night, but then she overworked and made herself sick. Beelzebub wants more Nutri-spirit. Azusa punishes Halkara for wasting her time. Halkara decides to move her Nutri-spirit factory to Flatta to keep living with Azusa. Beelzebub agrees to visit again to settle her duel against Azusa in a friendly manner, and to visit Falfa and Shalsha. Azusa decides she can handle her new family growing even larger, until Laika suddenly announces she is returning to her own home.
4 "We Went to a Dragon's Wedding"
Transcription: "Doragon no Kekkonshiki ni Itta" (Japanese: ドラゴンの結婚式に行った)
Takahiro Ōkawa Yutaka Yasunaga May 1, 2021
Laika clarifies she is only leaving temporarily to attend her older sister Leila’s wedding and they are all invited. Laika flies them to Mount Rokko, the volcanic home of the red dragons. Dragons from the enemy blue dragon clan crash the party led by Flatorte, a notorious bully who is jealous Laika’s sister is getting married before her, and so will use their ice breath to completely freeze Mount Rokko. Azusa decides not to interfere in an inter-clan issue but when a dragon endangers her daughters she defeats the blue dragons and forces Flatorte to flee the wedding. At Mount Rokko’s village, Azusa finds Beelzebub, there for a hot spring vacation, draining the rest of the blue dragon’s magic. Laika forces the captured Flatorte to assume her human form and pay for the damages. Azusa also forces her to sign a peace treaty so she can never attack the red dragons again. At the wedding Flatorte begrudgingly wishes Leila well as a married woman. Laika asks Azusa if she can treat her as a sister now her own sister is married. Azusa is happy Laika is now her younger sister, Beelzebub her older sister, and Halkara her troublesome apprentice.
5 "A Ghost Appeared"
Transcription: "Yūrei ga Deta" (Japanese: 幽霊が出た)
Yasunori Gotō Naohiro Fukushima May 8, 2021
Halkara’s new factory has a ghost so she has been unable to hire workers. Azusa summons Beelzebub to help as she is scared of ghosts. Beelzebub forces the ghost to make itself visible, revealing she is a teenage girl called Rosalie who committed suicide centuries ago when her selfish parents sold her to be married to a cruel man. The factory used to be her family home and like a ghost she is trapped in the place she died. Beelzebub reveals if she possesses a human to travel outside the building she will be freed, so Azusa offers Halkara as a convenient vessel, thrilling Rosalie. At Azusa’s home Rosalie realises she is stuck in Halkara’s body, which Beelzebub explains could kill Halkara before long. Attempting to remove Rosalie proves difficult as she can’t be shaken out, exorcised out or even scared out. Hoping putting Rosalie to sleep will help they get her drunk, allowing Halkara to regain her body, then Rosalie is sobered up by dunking Halkara in freezing water, causing Rosalie to jump out of Halkara’s body. Revealing she can use magic Rosalie dispels the rumours about ghosts by making herself useful to the villagers, allowing Halkara to begin hiring workers.
6 "Along Came a Leviathan"
Transcription: "Rivaiasan ga Kita" (Japanese: リヴァイアサンが来た)
Kyōsuke Takada Tatsuya Takahashi May 15, 2021
Beelzebub announces Azusa will receive the Demon Medal of Honour for ending the war between the dragon clans, meaning they must visit the Demon Realm. Rosalie worries she won’t be able to wear a nice dress since ghosts are permanently stuck in the outfit they died in. Since no spell exists to change a ghost’s appearance Azusa decides to create the spell herself and manages to successfully change Rosalie into a dress. Beelzebub arrives with a giant flying whale demon named Fatla to transport them to the Demon Realm. Fatla is so large she carries a luxury hotel on her back run by her sister Vania. After spending the night they arrive at the demon capital city Vanzeld to meet the Demon King. The Demon King turns out to be a little girl, Provat Pecora Allieres, who is a fan of Azusa and of Halkara’s Nutri-Spirit drink. Halkara, not initially realizing Provat is Demon King, makes several rude remarks and has to grovel for forgiveness. Provat finds her funny and forgives her, only for Halkara to head-butt her while rising from her groveling position. With Provat unconscious Halkara is arrested for attacking Demon Royalty and sentenced to death.
7 "We Beat Up a Demon King"
Transcription: "Maō o Taoshichatta" (Japanese: 魔王を倒しちゃった)
Shin'ichi Omata Tatsuya Takahashi May 22, 2021
Azusa hatches a plan to wake Provat using a foul-tasting potion. Provat wakes up and accuses Azusa of trying to poison her, then challenges her to a duel. Azusa destroys Provat’s sword so Provat agrees to spare Halkara but then admits she has been seeking someone stronger than her and declares Azusa is her big sister. Forced to agree Azusa pretends to be a domineering big sister and forces Provat (now insisting on being called Pecora) to free Halkara. Pecora admits she has a “submission complex” and wants Azusa to boss her around. At the medal of honour ceremony, Pecora gives medals to Azusa and to Laika and Flatorte to celebrate the end of the dragon war. She also forces Flatorte to let Azusa touch her horns as a sign of peace. Flatorte reveals Azusa touching her horns means Azusa is now her master, so she must serve Azusa forever or commit suicide. Azusa realizes Pecora manipulated her into having to take Flatorte home with her so she orders Flatorte to think and act for herself, freeing Flatorte from servitude through a loophole. Flatorte decides to live with her anyway and starts calling Azusa Mama, leading to sibling rivalry with Laika.
8 "A Fake Witch of the Highlands Appeared"
Transcription: "Kōgen no Majo no Nisemono ga Deta" (Japanese: 高原の魔女の偽物が出た)
Ryūta Yamamoto Naohiro Fukushima May 29, 2021
Laika and Flatorte bicker constantly. Falfa and Shalsha believe they are grumpy from not having eaten fresh meat. Natalie from the guild brings news of a boar infestation, delighting Laika and Flatorte. After killing the boars Beelzebub and Fatla arrive and organize a feast of boar meat. Laika and Flatorte admit they were bickering over taking turns sleeping next to Azusa, so Azusa lets them both sleep in her bed. Azusa realizes someone has been impersonating her. While gathering information they stumble into a pub that specializes in serving masochists and the owner offers to identify fake Azusa if they spend time abusing her customers, which Azusa and Laika discover they have a talent for. The fake is an old woman who tries to flee but is caught and transforms into a young witch named Eno. Eno explains she is a medicine maker and wants to be famous but at the same time doesn’t want too many people to recognize her. Azusa suggests she sell her medicines but in character as an idol girl so she will be both famous and completely anonymous. Her medicine proves to be so popular she asks Azusa’s advice on expanding her business, and Halkara even considers making her a business partner at her factory.
9 "My Daughter Turned Into a Slime and Couldn't Change Back"
Transcription: "Musume ga Suraimu Kara Modorenaku Natta" (Japanese: 娘がスライムから戻れなくなった)
Ryūta Imaizumi
Yoshiyuki Kumeda
Yutaka Yasunaga June 5, 2021
Falfa somehow turns into a Slime and can’t turn back. Beelzebub suggests they ask Intelligent Slime who lives in Pecora’s castle. Intelligent-Slime does not know but points them to Magician-Slime atop a nearby mountain. Magician-Slime explains she was a slime but used transformation magic to become human. She instantly diagnoses that Falfa is in her “sleep form”, meaning she must have pulled a muscle in her sleep, making it too difficult to maintain a human form. As she did this on instinct she must learn how to transform back and suggests asking Fighter-Slime who gained her human form by studying martial arts. They locate Fighter-Slime at a fighting tournament which Azusa and Beelzebub both enter. Beelzebub defeats Fighter-Slime who helps Falfa turn back into a human. Beelzebub demands Azusa fight her in the final to settle their old duel. Azusa refuses to lose while her daughters are watching and defeats Beelzebub again. Beelzebub later points out that, having won the tournament, Azusa’s fame will spread further and cause her even more problems. Fighter-Slime asks to become Azusa’s student but is defeated when she senses from Azusa’a aura how many slimes she has killed, so she becomes the student of the reluctant Beelzebub instead.
10 "A Minstrel Came to Town"
Transcription: "Gin'yū Shijin ga Kita" (Japanese: 吟遊詩人が来た)
Nanase Tomii Yutaka Yasunaga June 12, 2021
Schifanoia, a rabbit-girl musician, visits Flatta village but her Death Music doesn’t impress the villagers. She passes out from hunger so Azusa takes her home where she reveals her real name is Kuku. She has been failing as a musician for sixty-three years and is now considering getting a real job. Azusa advises she continue if it makes her happy. Flatorte, a music fan, points out Death Music isn’t popular anymore, plus Kuku isn’t that talented. Azusa suggests changing her style and asks everyone to think of new lyrics. Laika sings about devotion to Azusa, Halkara a song promoting her nutri-drink, Falfa and Shalsha sing about grasshoppers and Rosalie sings about the depression of being dead. Kuku decides to abandon her Schifanoia persona and write a song inspired by Azusa and her family. Beelzebub arrives, hears Kuku’s new song and demands she perform at the demon music festival. Kuku suffers stage fright at the thought of such a large audience but is helped through it by Flatorte, performing her song “Thank You” to massive applause. Her breakout performance leads to hundreds of offers to play at other concerts. Kuku thanks everyone for believing in her, especially Flatorte who tells her to keep playing whatever style makes her happy, no matter what.
11 "I Ate a Mushroom and Turned Into a Child"
Transcription: "Kinoko o Tabete Kodomo ni Natta" (Japanese: キノコを食べて子供になった)
Atsushi Kashiwa Tatsuya Takahashi June 19, 2021
Halkara accidentally feeds Azusa a magical mushroom, turning Azusa into a child. Azusa is annoyed but Laika and Flatorte are delighted. Azusa summons Beelzebub, who is unable to resist her cuteness but agrees to take her to Pecora who is also smitten with Azusa’s cuteness but directs her to a dungeon within a giant World Tree where an alchemist lives. Azusa expects a dangerous journey but finds the tree has been turned into a 108-floor tourist attraction where the higher they travel, the more money the tickets cost. Navigating the tourist traps takes time and they stay overnight in a hot spring on floor 38, then the next night on floor 84. Reaching floor 108 the alchemist, a young girl, gives her the cure, pills made by Eno. Eno arrives and is surprised Azusa climbed the tree when wyverns could have flown her to the top, plus the medicine is available in Eno’s shop close to Azusa’s home. Azusa returns to Pecora’s castle and takes the pills, but forgets to change clothes first so when she grows her clothes tear and leave her naked, to Pecora’s delight. Tired and dirty Azusa insists everyone bathe together, including Pecora who asks if she can grope Azusa’s adult breasts, chasing her around the bathroom.
12 "We Opened a Coffee Shop"
Transcription: "Kissaten o Hiraita" (Japanese: 喫茶店を開いた)
Nobukage Kimura Naohiro Fukushima June 26, 2021
The group visits Flatta which is preparing for the dance festival, a two-day event to celebrate the harvest. Azusa had previously distanced herself from past dance festivals, but having bonded with the others, wants to do something for the festival. During lunch at a cafe, Azusa gets inspiration from observing the strengths of others to run the coffee shop "The Witch's House" on the eve of the festival. In preparation for the festival, Azusa and the others try their waitress uniforms, prepare the menu, set up the coffee shop and distribute flyers to the Flatta townsfolk. On the eve of the festival, seeing the long queue to their coffee shop, Azusa opens the coffee shop one hour early and starts serving the customers with the others. As the coffee shop gets busier throughout the day, Beelzebub, Vania and Fatla and even Pecora pitch in to help, and Slime Fighter, Eno and Kuku also visit the coffee shop. With their help, Azusa and the others manage to serve all the customers and close up shop. Azusa thanks the others for making the coffee shop a success before they take a break while she reflects on the events of the series.

The next day, with the others wanting to visit the dance festival, Azusa decides to take the group to the dance festival on the night. Azusa gets a knock on the door which she opens, greeting the person which starts her day.

Key Visual


Web Radio

About 1 minute of web radio by Kaede Hondo as Leica and Sayaka Senbongi as Falfa "I've Been Killed Slime for 300 minutes, I talked for 300 minutes without knowing it", but from October 8, 2020, official Twitter and YouTube Delivered daily on the channel. A total of 300 minutes including the special program was delivered. The abbreviation is "300 minutes after defeating slime", and the title call is basically made here.

Promotion development

As part of the promotion, we are collaborating with the mascot character on- chan of Hokkaido Television Broadcasting (HTB), which has been broadcasting this work since May 24, 2021 .  , who is working on the original illustration, has been released on the official anime website and is also used as the top banner for a limited time on the official character website "on-chan world". In addition, comments and message videos by Riho Sugiyama, who plays Rosalie, have also been released.


"I have no desire to be known as the strongest. " ― Azusa Aizawa

"Well, I guess it can't hurt to take advantage of people's kindness now and then." ― Azusa Aizawa

The main character of this work. An office lady who died from overwork at the age of 27 in her previous life. She has two names, "Witch of the Plateau", and she is loved. She looks like a 17-year-old girl, but she is about 300 years old.

After dying from overwork, the goddess Mega Mega God, who says "I can fulfill any wishes so that I can live happily in the afterlife" in the other world, wishes "I want to become immortal and live a slow life at the house of the plateau", at the suggestion of the goddess. Reincarnated as an apparent 17-year-old immortal witch. She lived in a plateau house near the village of Frata given by The Megamega God, and enjoyed a slow life that he could not have experienced in his previous life while occasionally interacting with the villagers. However, due to the experience value, it can be reached as "level 99", and it has enormous magical power.

I avoided being deeply involved with people because I wanted to live quietly and because I was an immortal person, but I couldn't leave people in trouble. Therefore, he is loved by the villagers like a guardian deity, and after it was revealed that he was at level MAX, he became involved in various things. In addition, from the experience of being unreasonable and dying from overwork in the previous life, we will deal with those who are unreasonable and those who think lightly about their own lives, especially seriously. Perhaps because of his adorable personality, when he made a "monster journey" from Vanzeld Castle to Efock, he was fond of deer and basilisks on the way to the mountain pass, and he came to visit him from the other side.

Since the level has been completed, many magics are listed in the status, but since it is necessary to learn the theory to be able to actually use it, Azusa who is not so interested in more magic than necessary because he is a medicinal witch will be described later. Except for some magic, it is not used so much, such as magic used for housework, flying magic, magic to change Rosalie's clothes, and transparent magic used to watch over children from the shadows.

Since the magic used by the demons is difficult to pronounce and cannot be remembered, the magic of the demons is not used except for the magic of summoning Beelzebub. She also said she was strong not only in magic but also in martial arts, but she didn't have the knowledge of her martial arts  and made her talk to high status. It's close to pushing.

For example, in the martial arts competition she participated in in search of Bussler, she defeated Beelzebub in the final to win the championship. She doesn't use much attack magic such as lightning strikes and only fights because she doesn't usually use attack magic so much that she doesn't know how to adjust. She has a high level of defense, but is not resistant to poisonous mushrooms, herbs, and magical abnormalities.

She is also not good at ghosts and demons, cannot see ghosts that have not been revealed  , and she cannot touch ghosts unlike Beelzebub. When she later confronted Goddess Nintan, she was blessed by the god Megamega and she broke through the limits from "level 99" to "level god class".

It seems to be in the beautiful category, but it has some complex in terms of style (especially chest size). In addition, the naming sense is so bad that it is said to be a weak point in the family, and the creation of songs etc. is not very highly evaluated. On the other hand, she wasn't aware of it at all, but she was highly evaluated for Tsukkomi.

Despite the fact that the original occupation is a medicinal witch, at the eve of the "Dance Festival" in Frata Village, which has a tradition of about 250 years, the villagers asked to open the "Coffee" Witch's House", and in the previous life. Recalling Japan, he creates "eating slime" (bun) and "leaf slime" (kashiwa mochi), so he is reluctantly known as a "witch making sweets".

As mentioned above, I don't do much in front of strong races such as dragons and demons because I want to live quietly, but I try to hide its power in front of humans as much as possible. When he has to capture a dungeon, he wears a dragon's horn at the suggestion of Flat Rute and uses the pseudonym Azzard attached to Beelzebub. He also used pseudonyms such as Az Ririri in front of the witch. He has also been transformed by Protiputan into a magical monk, Cute Abyss.

The housework is decided to be a shift system, but the laundry is done by Azusa using the magic of a tornado. She also uses magic to freeze ingredients and dishes. She only knew that she had reincarnated in this world in the second half of mid-May, so she and Falfa Sharsha Sandra, who do not know the exact date of birth, she made May 17 as her birthday. In her previous life, she was a black-haired woman, and in college she belonged to the hot spring table tennis circle "Fluffy".


Azusa is generally characterized as a laid back and carefree individual, taking things at her own pace and encouraging others to do the same. Largely as a result of her death by overwork in her previous life, she's averse to demanding work, having spent most of her life killing ses. On the other hand, she still recognizes the importance of completing it so long as it doesn't corrupt her life ethic.

Additionally, she is also very charitable and hospitable, having befriended and accepted a wide range of different people and species. This includes characters that originally intended to kill her, in the case of Shalsha, and people who used her name to commit fraud. This attitude made her a beloved celebrity in Flatta, where the villagers offer to treat/reward Azusa as thanks for her medicine.

Status & Skills

Tier : 5C ← Azusa remained ignorant of much of her magic for centuries. After her level outing, she's learning how to use her magic.

Her main skills are immortality and agelessness, which were gifted to her by the Goodly Godly Godness by request.

Name: Azusa Aizawa Occupation: Divinely Blessed Witch
Occupation: Divinely Blessed Witch Level: 99 God-Tier [MAX]
HP: 856 Magical Power: 999+
Attack: 896 Agility: 999+
Defense: 788 Intelligence: 999+
Teleportation, Levitation, Blazing Flames, Tornado, Item Appraisal, Earthquake, Blizzard, Lightning Strike, Mind Control, Dispel, Detoxification, Magic Reflection, Mana Absorption, Language Comprehension, Shape Shifting, Magical Creation, Create Barrier, Restoration, Garment Creation for Ghosts, Invisibility
Special Abilities
Knowledge of herbs, Immortality of the witch, Increased EXP Acquisition, Spreading happiness to others, Ageless



Two days after the first post on June 23, 2016  . The next day she renewed her highest score and reached number one in the weekly ranking on the 29th. It was decided to make a book on GA Novel on November 14th. Volume 1 is the number one GA novel sales in history  and is frequently reprinted (reprinted)  . The first episode of comicalize was the highest page view in the history of "Gangan GA", and the first episode of spin-off was also the top level page view in the novel . On September 6, 2017, he entered the cumulative ranking of "Become a Novelist". It began to appear frequently in the Oricon weekly literary book rankings,  and in November 2018, eight volumes were released, exceeding her own maximum volume of seven.

"This light novel is amazing!" Ranked 9th in the book / novels category in the 2019 edition . As of January 2021, the cumulative circulation of the series, including novels and comicalize, has exceeded 2 million .

Ichishi Iida was an animated version of this work posted by Morita Kiyoshi, who was born in a paperback light novel, as a hobby, but as of the early 2020s, there was no other online novel from the same person, and this work is Since only women are involved in living with Azusa and being involved in the main events, one story written with a different world-like seasoning that will allow women to interact with each other like the Moe 4-frame cartoon of Yoshibunsha is short. Described as a series of comedies, it is full of real intentions and desires for labor, and love and sexual retreat and pseudo-family friendship in a different world fantasy (book Ranobe) from an online novel that is common in popular works since the latter half of the 2010s. It is said that there is a praise of Sa.

The dialogue of this work was selected in the 2102th column of Kiyokazu Washida 's column "Original Words" published on the first page of the morning edition of the Asahi Shimbun on August 1, 2021.

External Links

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to be added.