

Web series
I've Been Killing Slimes for 300 Years and Maxed Out My Level
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?!
- Status
- Ended
- Type
- Scripted
- Last aired
- 2025-06-21
- Language
- Japanese
AT-X
- witch
- magic
- slime
- immortality
- reincarnation
- slice of life
- anime
- other world
- sword and sorcery
- isekai
- based on light novel
- gentle
Seasons

Season 1
12 episodes · 2021
After many years of being a corporate slave, Azusa Aizawa abruptly passes away due to severe exhaustion. Seemingly headed for the afterlife, she meets a goddess who bestows her with immortality alongside a peaceful life in another world. There, Azusa enjoys her days tending to her farm, protecting the nearby village, and killing about 25 slimes per day—a routine that continues for at least three centuries. However, this rather monotonous cycle begins to change when Azusa suddenly finds out that she has reached level 99—the maximum possible level—from slimes alone. Despite desperately trying to hide this fact in fear of ending her slow life, rumors of her strength spread nevertheless. Soon enough, various people throughout the continent, start to appear at her doorstep—some seeking a battle, others asking for her assistance. Meeting friends and acquaintances who soon become family, Azusa finds she can live a life far better with others than when she was alone.
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Season 2
12 episodes · 2025
Get ready for more relaxing tales! Azusa Aizawa is a powerful witch who finally reached level 99 and now busies herself with laid-back quests instead. Her family continues to grow as some familiar faces are joined by bright-eyed newcomers. From trips to the beach to a martial arts tournament, you’re invited on Azusa’s carefree and heartwarming adventures of leisure.
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Top billed cast


















Where to watch
All optionsAvailability for India. Provided by JustWatch through the TMDB API.
Gallery






Air dates
- First aired
- 2021-04-10
- Latest episode
- 2025-06-21
- Status
- Ended
- Next release
- Completed
- Season 110 Apr 2021
- Season 25 Apr 2025
Frequently asked questions
- Where can I watch I've Been Killing Slimes for 300 Years and Maxed Out My Level?
- Available on Crunchyroll, Crunchyroll Amazon Channel, Anime Times Amazon Channel in India — see the Where to watch section above.
- How many seasons does I've Been Killing Slimes for 300 Years and Maxed Out My Level have?
- 2 seasons · 24 episodes · Ended.
- What is the rating of I've Been Killing Slimes for 300 Years and Maxed Out My Level?
- 7.8/10 from 242 TMDB votes.











