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 (2021)

U/A 13+ 10/04/2021
  • Animation, Comedy, Sci-Fi & Fantasy
79%
  • Status : Ended
  • Total Seasons : 2
  • Total Episodes : 24

Overview

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?!
  • Status : Ended
  • Total Seasons : 2
  • Total Episodes : 24

Overview

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?!
Top Billed Cast
Aoi Yuuki
Aoi Yuuki

Azusa (voice)

Kaede Hondo
Kaede Hondo

Laika (voice)

Sayaka Senbongi
Sayaka Senbongi

Falfa (voice)

Minami Tanaka
Minami Tanaka

Shalsha (voice)

Sayaka Harada
Sayaka Harada

Halkara (voice)

Manami Numakura
Manami Numakura

Beelzebub (voice)

Riho Sugiyama
Riho Sugiyama

Rosary (voice)

Azumi Waki
Azumi Waki

Fratorte (voice)

Yukari Tamura
Yukari Tamura

Pecora (voice)

Crew Members
Aguri Oonishi
Aguri Oonishi

Theme Song Performance

Yui Ogura
Yui Ogura

Theme Song Performance

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I've Been Killing Slimes for 300 Years and Maxed Out My Level (2021) – Full TV Series Summary, Episodes & Review

TitleI've Been Killing Slimes for 300 Years and Maxed Out My Level
First Air DateSat Apr 10 2021
Last Air DateSat Jun 21 2025
StatusEnded
Tagline-
CountryJP
LanguageJapanese
GenresAnimation, Comedy, Sci-Fi & Fantasy
Total Seasons2
Total Episodes24
Creators-
ProductionREVOROOT, Nippon Columbia, Hakuhodo DY Music & Pictures, BS11, STUDIO MAUSU, AT-X, THE KLOCKWORX, movic, DMM GAMES, Bushiroad, Medicos Entertainment, Square Enix, SB Creative
Rating7.9/10

Overview

I've Been Killing Slimes for 300 Years and Maxed Out My Level is a Animation, Comedy, Sci-Fi & Fantasy television series that premiered in 2021, with its first episode releasing on Sat Apr 10 2021. Known for its cinematic production quality and gripping storyline, the show has become one of the most influential modern series in its genre.

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?!

Latest Episode Details

We Opened the Coffee Shop Again This Year
Season 2, Episode 12
Aired on 2025-06-21
Runtime: 24 minutes
It's time for Flatta's annual dance festival again, and The Witch's House makes its long-awaited return.

Storyline & Plot Overview

I've Been Killing Slimes for 300 Years and Maxed Out My Level follows a layered narrative filled with mystery, emotional depth, and character evolution. Each season expands on the core storyline while introducing new conflicts, dangers, and twists that keep audiences engaged. The show masterfully balances suspense, sci-fi concepts, and personal character drama, making it a binge-worthy experience.

Production & Background

Created by and produced by REVOROOT, Nippon Columbia, Hakuhodo DY Music & Pictures, BS11, STUDIO MAUSU, AT-X, THE KLOCKWORX, movic, DMM GAMES, Bushiroad, Medicos Entertainment, Square Enix, SB Creative, the series features top-tier cinematography, atmospheric lighting, and highly detailed world-building. Filming locations, visual effects, and sound design all contribute to creating a cinematic universe that feels immersive and authentic.

Audience Response

With an impressive rating of 7.9/10, the series has gained global acclaim. Viewers praise its emotional storytelling, character depth, pacing, and ability to maintain suspense across multiple seasons.

Similar TV Shows You May Like

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  • Other series with supernatural or mystery-driven plots

Frequently Asked Questions

1. How many seasons does this series have?
The show currently features 2 seasons with a total of 24 episodes.

2. Is the series still running?
No, the series has concluded its run.

3. Where can I watch this TV show?
It is available on its official streaming platform based on region and licensing.

4. What genre does this series belong to?
It primarily falls under Animation, Comedy, Sci-Fi & Fantasy, blending multiple elements to create a unique viewing experience.

5. Is this TV show based on a book or original screenplay?
The show is creatively developed by the creators, using a mix of original storytelling and thematic inspirations.

6. Does each season follow a continuous storyline?
Yes, the series builds upon previous seasons while expanding its world, characters, and narrative arcs.

7. How long is each episode?
Episode runtime varies depending on the season and creative direction.

8. Are new episodes coming soon?
There is no official release date for upcoming episodes.

9. What makes this show popular?
The series is praised for its character depth, storytelling, world-building, and consistent suspense.

10. Is this series good for binge-watching?
Yes, the engaging storyline and seasonal cliffhangers make it perfect for binge-watch sessions.

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