Not only they're not going to sue him, they're also going to have sex right after, as if that's the first thing the victim wants to do after being sexually assaulted.
I don't know about sexual assault cases in Japan but I do have to wonder if it's cuz of the differences in Japan's legal system, too... But god I wish they'd treat SA more seriously omg
So they are not gonna sue that guy for trying to rape uke? Yes yes common yaoi manga logic