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

 

Having died and been re-incarnated, Azusa Aizawa is given the gift of an immortal 17 year old body. She will never age and is able to live her peaceful life in the woods surrounded by nothing but nature and quiet. This, off course, leads her to reaching the max level 99 after killing the harmless slimes for 300 years. With this max level, she's able to command dragons, ghosts, and other monster girls to do her bidding... but she just wants peace and quiet.