Teach me about Shota/ pedophilia

Hello! So I saw this question about shota oni and tbh I read its beginning and I thought it was a cute story about a child's puppy love ,since the story POV is from the child ( from what I remember) .. though I haven't read it again so I'm not really sure...

Anyways.... So we all know that pedophilia is about an adult person who's attracted to an underage children.

My question is ... Just like in shota oni is the adult person a pedo when the child is the one who love/like the adult, while the adult only thinks of the child as a little brother??

Please enlighten me , since I've been curious and confused about this question