I've Been Killing Slimes for 300 Years and Maxed Out My Level (2021)
04/10/2021 (JP) • 24m
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
Last Season
2025 | 12 Episodes
Season 2 of I've Been Killing Slimes for 300 Years and Maxed Out My Level premiered on April 5, 2025.
Recommendations
Let's Make a Mug Too
63%
Bottom-Tier Character Tomozaki
62%
Restaurant to Another World
73%
I'll Become a Villainess Who Goes Down in History
77%
KADO: The Right Answer
78%
The Gorilla God's Go-To Girl
75%
Sleepy Princess in the Demon Castle
84%
SSSS.DYNAZENON
74%
11eyes
75%
Peach Boy Riverside
72%
In Another World with My Smartphone
72%
BOFURI: I Don't Want to Get Hurt, so I'll Max Out My Defense.
74%
The 8th Son? Are You Kidding Me?
76%
K-ON!
79%
The Ossan Newbie Adventurer, Trained to Death by the Most Powerful Party, Became Invincible
78%
From Old Country Bumpkin to Master Swordsman
76%
Fruits Basket
79%
Battle Game in 5 Seconds
78%
Infinite Stratos
76%
Dark Fate
72%
© All Rights Reserved 2025