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

This gentle fantasy comedy turns accidental max-level power into a threat to one witch's quiet routine, favoring domestic company over conquest.

Synopsis
The Anime Lad

Azusa starts a new life as an immortal witch and chooses a quiet cottage with almost no ambition whatsoever. Three hundred years of casually defeating slimes have nevertheless made her extremely powerful. News travels. Her peaceful schedule begins attracting people who interpret overwhelming strength as an invitation, which is unfortunate because she had plans to do very little.

Super Eyepatch Fox

Azusa begins life as an immortal witch and spends centuries living quietly. Routine slime hunting quietly maxes her level. Once the rumor escapes, challengers and curious visitors begin finding her cottage. She has enough power to solve almost anything, but every solution risks expanding the peaceful life she meant to protect.

Gigguku

Azusa escapes brutal workplace culture, builds the softest possible fantasy routine, then learns her harmless daily slime habit made her absurdly strong. I love that the main conflict is unwanted busyness. Visitors keep testing the boundaries of her cottage life, and her overwhelming power matters less than the warm, ridiculous household forming around her.

Father's Basement

An immortal max-level witch removes most conventional suspense before the opening credits finish their work. Fortunately, the series is more interested in comfort than danger. Azusa wants an unhurried life, yet her reputation keeps delivering complications to the doorstep. The jokes are mild and the fantasy world is familiar, but its resistance to grind culture has genuine charm.

An at-home comedy about a powerful girl who doesn’t work too hard!(⋈◍ ˃ᴗ˂ ◍)。✧♡ 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!

What defines it

A cozy iyashikei isekai. Gentle and low-stakes.

Watch path

Watch the numbered main seasons in order. Announced continuations follow the released entries. Optional titles are not included in this main-series path.

Recommendation shape

MoodMostly bright
BrightBleak
PaceNot enough evidence
StoryNot enough evidence
ActionNot enough evidence
Moral framingNot enough evidence
Cast focusNot enough evidence