I've Been Killing Slimes for 300 Years and Maxed Out My Level(2021)
I've Been Killing Slimes for 300 Years and Maxed Out My Level Synopsis
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?!
I've Been Killing Slimes for 300 Years and Maxed Out My Level (2021) is a animation, comedy and sci-fi & fantasy series that premiered on April 10, 2021, spanning 2 seasons and 24 episodes. It stars Aoi Yuuki, Kaede Hondo, Sayaka Senbongi and Minami Tanaka. Viewers rate it 7.8 out of 10 across 243 ratings.
- First aired:
- 2021-04-10
- Last aired:
- 2025-06-21
I've Been Killing Slimes for 300 Years and Maxed Out My Level (2021) Trailer
Watch the official trailer for I've Been Killing Slimes for 300 Years and Maxed Out My Level before you start streaming.
I've Been Killing Slimes for 300 Years and Maxed Out My Level Cast & Crew
Main cast
Aoi Yuuki
as Azusa (voice)
Kaede Hondo
as Laika (voice)
Sayaka Senbongi
as Falfa (voice)
Minami Tanaka
as Shalsha (voice)
Sayaka Harada
as Halkara (voice)
Manami Numakura
as Beelzebub (voice)
Riho Sugiyama
as Rosary (voice)
Azumi Waki
as Fratorte (voice)
Yukari Tamura
as Pecora (voice)
Explore more Animation shows
I've Been Killing Slimes for 300 Years and Maxed Out My Level Reviews & Ratings
Average viewer score of 7.8/10 from 243 ratings.
You may also like
The Slime Diaries
2021
I Was Reincarnated as the 7th Prince so I Can Take My Time Perfecting My Magical Ability
2024
The Water Magician
2025
The Faraway Paladin
2021
The Reincarnation of the Strongest Exorcist in Another World
2023
Parallel World Pharmacy
2022
KamiKatsu: Working for God in a Godless World
2023
The Aristocrat's Otherworldly Adventure: Serving Gods Who Go Too Far
2023
By the Grace of the Gods
2020
The Misfit of Demon King Academy
2020
Reborn to Master the Blade: From Hero-King to Extraordinary Squire ♀
2023
Didn't I Say to Make My Abilities Average in the Next Life?!
2019
Dead Mount Death Play
2023
The Greatest Demon Lord Is Reborn as a Typical Nobody
2022
My Unique Skill Makes Me OP Even at Level 1
2023
The Saint's Magic Power Is Omnipotent
2021
Natsume's Book of Friends
2008
The Strongest Sage with the Weakest Crest
2022
When Supernatural Battles Became Commonplace
2014
Flying Witch
2016
Shows similar to I've Been Killing Slimes for 300 Years and Maxed Out My Level
Eureeka's Castle
1989
The Daily Life of a Part-time Torturer
2026
Pro Golfer Saru
1985
Girl's High
2006
Kasumin
2001
NEEDY GIRL OVERDOSE
2026
I Parry Everything
2024
Vampire Dormitory
2024
Kashimashi - Girl Meets Girl
2006
New Century Legend Mars
2002
American Dragon: Jake Long
2005
The Fable
2024
Brave Bang Bravern!
2024
An Archdemon's Dilemma: How to Love Your Elf Bride
2024
Sanctuary: A Witch's Tale
2024
Helix
2014
Healer Girl
2022
Can I Make Your Ears Happy in 180 Seconds?
2021
PLUTO
2023
Motherland: Fort Salem
2020
I've Been Killing Slimes for 300 Years and Maxed Out My Level – Frequently Asked Questions
Where can I stream 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) is available to stream on Crunchyroll and Crunchyroll Amazon Channel, with episodes also available to buy from Amazon Video and Apple TV Store. Availability comes from JustWatch data and varies by country.
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 in total, starting from its premiere on April 10, 2021.
Is I've Been Killing Slimes for 300 Years and Maxed Out My Level still running?
+
No. I've Been Killing Slimes for 300 Years and Maxed Out My Level is marked as ended, with the final episode airing on June 21, 2025.
Who is in the cast of 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) stars Aoi Yuuki, Kaede Hondo, Sayaka Senbongi, Minami Tanaka and Sayaka Harada. The full cast list with character names is available in the cast section of this page.
Is I've Been Killing Slimes for 300 Years and Maxed Out My Level any good?
+
I've Been Killing Slimes for 300 Years and Maxed Out My Level (2021) is rated 7.8 out of 10 from 243 viewer votes, and suits viewers who like animation, comedy and sci-fi & fantasy series. Reviews from viewers are collected further down this page.
Where can I watch the I've Been Killing Slimes for 300 Years and Maxed Out My Level trailer?
+
The official I've Been Killing Slimes for 300 Years and Maxed Out My Level trailer is embedded in the trailer section of this page and plays instantly in your browser.