TV series

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
Cast: Aoi Yuki, Kaede Hondo, Sayaka Senbongi, Minami Tanaka, Sayaka Harada

2021–2025, Japanese, on AT-X.

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?!

Animation Comedy Sci-Fi & Fantasy

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Seasons: 2
Episodes: 24
Episode length: 24 min
Status: Ended in 2025

Worth the Hype

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7.8/10 from 247 TMDB viewer ratings.

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Where to watch 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 streaming on Crunchyroll and Anime Times in India.

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Availability in India as of 14 November 2026. Streaming data by JustWatch.

Latest episode

S2 E12: We Opened the Coffee Shop Again This Year

Aired 21 June 2025

Seasons 2

Season 1

2021 · 12 episodes · 6.7/10

Season 2

2025 · 12 episodes · 6.4/10

Cast & crew

Details

First aired: 10 April 2021
Last aired: 21 June 2025
Network: AT-X
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
Language: Japanese
Country: Japan
Type: Scripted
Rated: U/A 16+

witchmagicslimeimmortalityreincarnationslice of lifeanimeother worldsword and sorceryisekaibased on light novelgentle

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What I've Been Killing Slimes for 300 Years and Maxed Out My Level is based on

I've Been Killing Slimes for 300 Years and Maxed Out My Level is based on I've Been Killing Slimes for 300 Years and Maxed Out My Level, a 2017 light novel series by Kisetsu Morita, published by GA Novel.

Light novel series · 2017
I've Been Killing Slimes for 300 Years and Maxed Out My Level
By Kisetsu Morita
Published by GA Novel
Read on Wikipedia Wikidata

Worth the Hype

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

Is I've Been Killing Slimes for 300 Years and Maxed Out My Level worth watching?

Our verdict is Worth the Hype: Clear your evening for this. It scores 7.8/10 from 247 TMDB viewer ratings.

How many seasons of I've Been Killing Slimes for 300 Years and Maxed Out My Level are there?

I've Been Killing Slimes for 300 Years and Maxed Out My Level has 2 seasons and 24 episodes, about 24 minutes each.

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

Yes. I've Been Killing Slimes for 300 Years and Maxed Out My Level ended in 2025, so you can watch the whole story.

Which OTT platform is I've Been Killing Slimes for 300 Years and Maxed Out My Level on?

I've Been Killing Slimes for 300 Years and Maxed Out My Level is streaming on Crunchyroll and Anime Times in India. (Checked 14 November 2026.)

I've Been Killing Slimes for 300 Years and Maxed Out My Level parents guide: is it suitable for kids?

I've Been Killing Slimes for 300 Years and Maxed Out My Level is rated U/A 16+. Check the rating guidance before watching with young children.

What shows are like I've Been Killing Slimes for 300 Years and Maxed Out My Level?

If you liked I've Been Killing Slimes for 300 Years and Maxed Out My Level, try The Slime Diaries, KamiKatsu: Working for God in a Godless World, Magic Maker: How to Make Magic in Another World.

What is I've Been Killing Slimes for 300 Years and Maxed Out My Level based on?