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

After dying from overwork, Azusa Aizawa is reincarnated as an immortal witch and chooses the quietest life she can imagine. For 300 years she supports herself by casually killing slimes, never setting out on adventures or chasing fame.

That routine has an unexpected result: all those small battles eventually raise her to level 99. Once rumors spread about an extraordinarily powerful witch, Azusa's peaceful home begins attracting curious adventurers, dragons looking for a duel, and even a monster girl who calls her mother. I've Been Killing Slimes for 300 Years and Maxed Out My Level follows Azusa as accidental strength repeatedly threatens the relaxed life she worked so long to build.