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 Yuuki, Kaede Hondo, Sayaka Senbongi, Minami Tanaka, Sayaka Harada

7.8

2021

24m

Ended

Season

Episode

Watch Now

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?!

Animation Comedy Sci-Fi & Fantasy

Cast

Production

REVOROOT

Language

Japanese

Seasons

2 Seasons · 24 Episodes

Network

AT-X

About I've Been Killing Slimes for 300 Years and Maxed Out My Level (2021)

First broadcast in 2021, I've Been Killing Slimes for 300 Years and Maxed Out My Level is a animation, comedy and sci-fi & fantasy show aired by AT-X. The main cast includes Aoi Yuuki, Kaede Hondo, Sayaka Senbongi, Minami Tanaka and Sayaka Harada. The show has 2 seasons and 24 episodes and is currently listed as "Ended" with the most recent episode airing on June 21, 2025. Viewers rate it 7.8/10 on TMDB from 243 votes.

Every season and episode of I've Been Killing Slimes for 300 Years and Maxed Out My Level is available to stream free in HD on MyFlixer. Pick a season and episode above, press Watch Now and choose a server. Fans of the show also watch The Slime Diaries, The Water Magician and I Was Reincarnated as the 7th Prince so I Can Take My Time Perfecting My Magical Ability.

Where to watch I've Been Killing Slimes for 300 Years and Maxed Out My Level Season 1 Episode 1 online free →