Most Yaoi nowadays have rape in them. Or forceful sex. I don't agree with it but it's become a prominent part of the Yaoi world. From train groping to school bullies, it all happens in the yaoi world and 9/10 times it's the love interest seme that does it to the uke.
I got so excited when I though Shori was the main character and thought yes he's going to end up with Natsushiro but it turned out to be that shrimp... (╬ ̄皿 ̄)凸 don't like the first story at all. The seme was hot but the Uke was meh...
http://mangafox.me/manga/onepunch_man/vTBD/c074.2/1.html