Lol I think you use rape to easily. I honestly had to go back just to see what you were talking about. There is a difference between that and rape. He clearly wanted it just hurt is all. There is situations and times and places were no means no and then no means yes. This is one of them. If he truly didn’t want it he wouldn’t have followed him to the hotel. He really was saying no to the pain not the man.
He was saying NO to all of it. He follows him to the hotel under the intention that he was going to give him more blood or help him control his thirst, then he's some how tricked into bed with the man and he says no and the seme continues on, even though the uke is clearly in pain and doesn't want too. That is rape.
Why does all yaoi have some sort of rape in it?? Can we get at least ONE comic/webtoon/series where the SEX IS CONSENSUAL?