I'm Really Not a Demon Sect

Gu Chengan fled to Jiangzhou when he was four years old and spent eight years as an idiot. Until one rainy night, he accidentally killed a masked man in black. The memory returns instantly: Oh, it turns out I have traveled through time. He also unlocked a less serious ability: every time he kills someone, he can inherit the other person's life experience. Since then, there has been a "freak" in the world who specializes in picking off bad people. Gu Chengan was also helpless and sighed to the sky: "It's really not that I want to learn evil arts... But who told me to never kill good people?"