Slime Taoshite 300-nen, Shiranai Uchi ni Level Max ni Nattemashita

Alternate Name: 
I've Been Killing Slimes for 300 Years and Maxed Out My Level; Slime Slayer
Kisetsu Morita
Shiba Yuusuke
Japanese Manga (Read from left to right.)

Very ordinary company OL (Office Lady), Azusa Aizawa died from overwork.

For that reason, I decided to live a slow life at a house in the mountain as an immortal witch of with a figure of 17 years old.

The main source of income is to defeat slime inhabiting nearby to acquire magic stones. I sold this at the Guild in the village. Besides, I made medicinal herbs, Appreciated as “The Witch of the Highlands” and lived with respect and trust.

However, as a result of continuing her life to beat Slime for 300 years, experience values accumulated too much, and unknowingly became level 99 the world’s strongest witch.

The level 99 Witch now works together in the village with her dragon-girl apprentice in moderation, while helping everyone in the village.