I believe that's why Yeonwu feels responsible (he shouldn't, but he does) about Taehwan. He mentioned before that something DID happen between the two, that was probably the trigger for Taehwan.
Either that OR something else happened before, then whatever happened with Yeonwu did, and Taehwan felt attacked and betrayed. We need more of their past history together to know for sure, and we barely know about Taehwan's past as well ( ̄ε(# ̄)Σ
i think more people need to also consider that he's got serious trauma in his past that has skewed his ability to even think about his own sexuality in a meaningful way. he's clearly also got MASSIVE trust issues the cause of which we do not yet know (in the eng chpts) so like...its possible he's in denial but i think its more likely he's not even far enough to be in denial and has instead closed off an entire part of himself from trauma in his past that he's desperately trying to bury and not interact with. just like notice how he's totally okay wiht dojin and taehee's relationship whats everyone talks it out. he's very close with taehee, if he was worried about the icky gay rubbing off on him or his reputation then i think he wouldnt still be so close and adoring of his brother (esp after finding out his brother pursued dojin NOT the other way around). thats why i think its all alot more complicated than he is homophobic or internalizing homophobic bs against himself. will be interesting to see how people's perceptions of taehwan change in the upcoming chpts i guess. (cause i think having control and fearing vulnerability are a far bigger obstacle to his sexual identity than say possible being into guys as well as girls u know?). so im not disagreeing with ur general point just adding onto to it.
Taehwan is by no means homophobic. I believe it's laying more on the 'internalized homophobia' side. He's afraid of the external consequences of being labeled and recognized for his sexuality, be it whatever it is (but not straight, of course). He's unable to face his own sexuality properly, be it due to his raising or the environment he's in.
I was someone with internalized homophobia as well, even though I've always been a big LGBT supporter and most of my friends are part of the community, it took me years before I could accept to myself I was not straight. That said, I also have a gay friend who's homophobic, and BOY, it IS a thing!
I praise this author because so far she's done an EXCELLENT delivery of these heavier topics, always have, so I expect great things from this couple ヾ(☆▽☆)