Theory

I just caught up with this it’s my first time reading it. I get the feeling that mc actually lost his bio parents as a kid and that his current mom and dad might be his uncle and aunt? Or maybe his dad had a mistress and he’s the kid. But I think he was adopted by his current parents because he looks a lot like them and maybe there was something wrong with the white/silver haired high school so mc took his place as their kid.