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

Name: I've Been Killing Slimes for 300 Years and Maxed Out My Level
Genre: Animation, Comedy, Sci-Fi & Fantasy
Released: 2021-04-10
Rating: 7.8
Cast: Aoi Yuki, Kaede Hondo, Sayaka Senbongi, Minami Tanaka, Sayaka Harada

ENDED2 Seasons24 Episodes★ 7.8

I've Been Killing Slimes for 300 Years and Maxed Out My Level is an animated comedy series on AT-X that ran from 2021 to 2025, ending after 2 seasons and 24 episodes.

Never miss an episode of I've Been Killing Slimes for 300 Years and Maxed Out My Level

Get an email the moment a new episode airs — plus alerts if it's renewed or canceled.

NetworkAT-X

First AiredApr 10, 2021

Last AiredJun 21, 2025

GenreAnimation, Comedy, Sci-Fi & Fantasy

Runtime24 min

Original Title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

LanguageJapanese

CountryJapan

ProductionREVOROOT, Nippon Columbia, Hakuhodo DY Music & Pictures

After dying of overwork in the real world, I’m reincarnated as an immortal witch, and I spend 300 years enjoying a relaxing life. At some point, though, I end up at level 99! All those years spent killing slimes to make the money to pay the bills gave me a ton of experience points. Rumors of the level 99 witch spread, and soon I’m up to my ears in curious adventurers, duelist dragons, and even a monster girl calling me her mom! I’ve never been on an adventure, but I’m the strongest in the world… What’s going to happen to my relaxing life?!

WHERE TO WATCH

Crunchyroll

Amazon VideoBUY

Apple TV StoreBUY

Some links may earn us a commission. Data via JustWatch / TMDB

Cast

Aoi Yuki

Azusa (voice)

Kaede Hondo

Laika (voice)

Sayaka Senbongi

Falfa (voice)

Minami Tanaka

Shalsha (voice)

Sayaka Harada

Halkara (voice)

Manami Numakura

Beelzebub (voice)

Riho Sugiyama

Rosary (voice)

Azumi Waki

Fratorte (voice)

Yukari Tamura

Pecora (voice)

Seasons & Episodes2 seasons · 24 episodes

0% complete

Get ready for more relaxing tales! Azusa Aizawa is a powerful witch who finally reached level 99 and now busies herself with laid-back quests instead. Her family continues to grow as some familiar faces are joined by bright-eyed newcomers. From trips to the beach to a martial arts tournament, you’re invited on Azusa’s carefree and heartwarming adventures of leisure.

E1Along Came a Goddess

Apr 5, 202524m★ 6.8

Azusa learns that a goddess is making a public appearance in the provincial capital and goes to check it out.

E2We Searched for an Undead

Apr 12, 202524m★ 6.5

Azusa takes Falfa and Shalsha to the World Spirit Conference. When they return, Beelzebub asks for a favor.

E3We Went to Beelzebub's House

Apr 19, 202524m★ 6.0

When Beelzebub brags about her huge mansion, Azusa can't resist paying a visit to see it for herself.

E4We Went Looking for a Mandragora

Apr 26, 202524m★ 6.2

Azusa learns that mandragoras gain the ability to walk and talk after 300 years, so she goes to find one.

E5I Became Mama Yufufu's Daughter

May 3, 202524m★ 6.5

After Azusa eats a mushroom that makes her shrink, Yufufu ofers to be her mom for the day.

E6Laika Entered a Martial Arts Tournament

May 10, 202524m★ 6.3

Laika enters a martial arts tournament to help Fightie, who's hoping to win the prize money.

E7I Met a Pine Spirit

May 17, 202524m★ 6.3

Azusa tries to help a pine spirit whose temple has fallen on hard times due to a decrease in weddings.

E8We Went Swimming in the Sea

May 24, 202524m★ 6.3

Azusa takes her family to the ocean, where they meet a jellyfish spirit who also happens to be a painter.

E9We Met the Evil Spirit Queen

May 31, 202524m★ 6.0

Azusa and company try to get the queen of Thursa Thursa to come out of her tomb and rejoin her people.

E10We Went to the Demon King's Birthday Party

Jun 7, 202524m★ 6.3

Pecora hosts a grand birthday party, but the only gift she wants is a day alone with Azusa.

E11I Battled a Traditional Goddess

Jun 14, 202524m★ 6.3

Mega-mega has caught the eye of Nintan, a goddess who favors tradition and rejects new ideas.

E12We Opened the Coffee Shop Again This Year

Jun 21, 202524m★ 6.7

It's time for Flatta's annual dance festival again, and The Witch's House makes its long-awaited return.

About I've Been Killing Slimes for 300 Years and Maxed Out My Level

I've Been Killing Slimes for 300 Years and Maxed Out My Level is an animation, comedy, sci-fi & fantasy series on AT-X. The show first aired on Apr 10, 2021 and currently has 2 seasons and 24 episodes. I've Been Killing Slimes for 300 Years and Maxed Out My Level has ended. It has a rating of 7.8/10 based on 245 votes. The cast includes Aoi Yuki, Kaede Hondo, Sayaka Senbongi, Minami Tanaka, Sayaka Harada.