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Trailer

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

2021 – 2025Show2 seasons24 episodesTV-14

AnimationComedy
70
GoodGoodWatch score
IMDb6.2

A heartwarming, uplifting animated series about fantasy and family.

Good for date night · family movie night · friends night

Skip it if you want dark or edgy material

Where to watch

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Not for scares, brutality or tears.

Shows with

Episodes

2 seasons · 24 episodes · best: S1E7 "We Beat Up a Demon King" 7.4

Episodes

7.0
7.3

Story

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?!

Feels like

  • Isekai Slice-of-Life
  • Wholesome Fantasy
  • Found Family Dynamics
  • Overpowered Protagonist Comedy
  • Relaxing Atmosphere
  • Light RPG Mechanics
  • Cozy Cottagecore Aesthetic
  • Low-Stakes Adventure

Cast

24 of 62 · most episodes first

Crew

Directors
Nobukage Kimura, Ryuta Imaizumi, Nanase Tomii
Written by
Kisetsu Morita, Naohiro Fukushima, Tatsuya Takahashi
Produced by
Tomoyuki Ohwada, Yuichi Izumi, Yutaka Kashiwagi
Music by
Keiji Inai

Everyone

Pick a department, or search for a name or a job (“editor”, “stunt”).

Facts

April 10, 2021 · June 21, 2025 · Ended

First aired
April 10, 2021
Last aired
June 21, 2025
Status
Ended
Length
2 seasons · 24 episodes
Age rating
TV-14
Genres
Animation, Comedy, Sci-Fi & Fantasy
Original language
Japanese
Made in
Japan
Available in
116 countries

Q&A

7 questions, like "Where can I stream I've Been Killing Slimes for 300 Years and Maxed Out My Level?"

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

Quick answers from GoodWatch data.

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

Crunchyroll

In the United States, I've Been Killing Slimes for 300 Years and Maxed Out My Level streams on Crunchyroll. You can rent or buy it from Apple TV Store. It also streams in 115 other countries.

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

70
GoodGoodWatch score

Mostly, it's well received, with a GoodWatch score of 70 (IMDb 6.2).

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

TV-14

Yes: it's rated TV-14 in the United States, and the viewing guide lists it for kids.

How long does it take to watch I've Been Killing Slimes for 300 Years and Maxed Out My Level?

10 h

About 10 hours: 24 episodes in 2 seasons of about 24 minutes each, aired from 2021 to 2025.

Will I've Been Killing Slimes for 300 Years and Maxed Out My Level make me laugh?

Funny

Yes: the humor is mostly situational comedy (8 of 10) and absurd humor (7 of 10).

Will I feel good after watching I've Been Killing Slimes for 300 Years and Maxed Out My Level?

BleakHopeful

Yes, it's an uplifting series: the title analysis rates it 9 of 10 for hopefulness and 9 for wholesome.

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

Japanese

No, it was made in Japanese.