I don't know if Motoharu really manipulated him into raping him or if Motoharu just said that to protect his younger brother, like he's putting all the blame to him and not his brother.
I think I'm not just that good with English HAHAHA
Anyway, if Motoharu really manipulated him, then I think it's okay...
I mean, It's okay because they're both mentally ill and insane HAHAHAH
Deichuu no Hasu