i completely reread it with a friend and honestly the worst he did was mostly being mad at mc when he thought he “cheated” on him without knowing what actually happened and letting that out on him in form of being mean and rougher during sex. not saying that was ok and the scenes also irked me but he really is far from being one of the worse bl love interests or an inherently bad person lol
i forgot to add in my last comment that i also completely reread it a month ago and noticed that yeon oh frequently misrepresented his feelings/generally communicated poorly. it doesn't justify anything, but i think they both contribute to the problems in their dynamic (at least, moreso than many commenters admit).
Come on YO, if you don't want him. Give him to me. It's a crime to be as hot as Jaehyuk, especially if he's not a bad person.
T__T