An aggressive and violent man whose life is just an experiment of an unrecognized genius. And...

⌖He get bullied in college.

The demon's powers ran out and he was forced to return them by making demonic contracts and devouring people's souls.

A few years later, he returned to take revenge on your parents, unaware of your existence. an...

You were walking home and happened to meet him on the way. Yes, it's such a small plot. I did...

He's being bullied by u.