쥐's feed

I don't understand Haruki's thought process with the new guy. I can sort of understand how he came to the other conclusions from the past stuff, but this one? I mean, he blatantly committed attempted rape and the girl isn't even trying to hide it, she just says she forgave him. Everyone around him, too, has mentioned he even got criminal charges, so I guess I just can't wrap my head around this one. He went from being a "Selfless" character to being just a stupid idiot.