Redo of Healer (Uncensored)

Keyaru, a Hero with healing abilities, initially seemed poised for a promising future but was instead subjected to years of torture and abuse. He utilized his powers to secretly accumulate the memories and abilities of those he treated, gradually increasing his strength. After reaching his full potential, Keyaru decided to rewind the world back to a point before his suffering began using a powerful healing spell. He now aims to redo his past, driven by a desire for revenge against those who wronged him.