A world that i am not a loser Japan

Why me? A loser highschool student who's always get bullied
a poor student that doesn't have someone to rely on.

No parents or sibling
Ignored by the classmates
lived in a small apartment
i can't take it anymore but after the accident that happened to me,
I woke up and i was a kid again, my parent were alive and our household are rich.
What happened???