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

Kernel Score: 83% · 229 ratings

Genres: Animation, Comedy, Sci-Fi & Fantasy

First aired: 2021-04-10

Seasons: 2 · 24 episodes

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

US availability, updated 2026-10-23.

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?!

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Cast

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

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

I've Been Killing Slimes for 300 Years and Maxed Out My Level has an 83% Kernel Score on Fresh Kernels from 229 audience ratings.

Where can I watch I've Been Killing Slimes for 300 Years and Maxed Out My Level?

In the US you can stream I've Been Killing Slimes for 300 Years and Maxed Out My Level on Crunchyroll and buy it from Prime Video and Apple TV.

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

I've Been Killing Slimes for 300 Years and Maxed Out My Level is rated TV-14.

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, By the Grace of the Gods, The 8th Son? Are You Kidding Me? and That Time I Got Reincarnated as a Slime.