This is what the uke wanted. Like I know its not written the best but at the very least the author has made ukes intentions clear from the start. He has said he doesn't like gentle sex, he only enjoys it rough. To the point that he does "rape", drunk sex and power imbalances (his tutor). Even this chapter the author tells us he's enjoying it and even that he wants more, he's not safewording because he wants it like this, not because he is scared or any other reason.
I understand this isn't everyone's cup of tea, I personally read these to spice things up. So I at least understand when I read a "psychological" drama BL what kind of thing I'm signing up for. It's not particularly safe, definitely not sane, but it is consensual.