Responses
I think he will feel disapointed after having sex with this guy and woojin will use that to convince him that he's better... And it's normal for him to be disappointed as he has only had one type of sex and he got used to it...
I can also see that happening but only in the long run
What I think is gonna happen is that he will agree that they go out, but feeling conflicted that he is not thaat happy about it. He will try breaking it off with his brother, realizing wtf they were doing. But of course the brother will not accept it and try to convince that he is the better choice and forcing himself on him