I've Been Killing Slimes for 300 Years and Maxed Out My Level (Seasons 1–2)

I've Been Killing Slimes for 300 Years and Maxed Out My Level (2021) is a Japanese fantasy-comedy anime you can watch online on iFILM. The 12-episode series was produced by J.C.Staff and adapts Kiino Ichikawa's light novel series, following a premise that is exactly what the title says.

A former office worker dies from overwork and gets reincarnated as an immortal witch in another world. She wants one thing: a quiet life. For three centuries, she grows herbs, bakes bread, and kills a few slimes each day for pocket money. No dungeons, no drama. Then someone runs the numbers — three hundred years of slow grinding adds up — and she's now a level-99 witch, the most powerful entity around. Voiced by Aoi Yuki, the protagonist Azusa soon finds her peaceful cottage invaded by dragons looking for a fight, spirits who won't leave, and girls who insist on calling her mom.

This is an isekai built on comfort rather than stakes, which makes it a different kind of watch from the usual portal-fantasy rush to save the world. All episodes are available — stream the full season of I've Been Killing Slimes for 300 Years online on iFILM.