Reborn A Hero

Sung Jin Woo a man who went through a lot in his first life, he wanted to change fate, carry to burden of humanity, so he used the Cup of Reincarnation to start over. However, in his second life everything was different, earth wasn't the same as in his previous life, there was a butterfly effect causing people to develop mutant powers called quirks.

He was reborn as a baby, forgetting everything in his previous life until an incident with the slime villain caused him to unlock the leveling system and his old memories. He may have started from zero, but he's going to end up a hero.