Please read the official translation from https://mangaplus.shueisha.co.jp/viewer/1007664
It's a lot different from this fan translation
Why is everyone calling Hyunwoo homophobic? He's never said there's anything wrong with two guys liking each other, that's not the problem here. His problem is that he doesn't want any dating inside of the group because it might affect them negatively if they break up.
Hyunwoo is an insensitive bastard but he's not homophobic (at least with the current evidence).
Anyway, Hyunwoo really is an asshole. How dare he call it disgusting when he KNOWS two of his group members like each other. You call yourself a leader? You're intentionally causing harm and conflict within your group. It's okay if you don't personally like the idea of people writing fanfic about you (I totally get where he's coming from with the "using" comment because honestly, fanfic is kind of using your idols for your fantasies, especially in AU fanfics. Not that it's necessarily in a bad way) but you're an idol, you should have already known this was a thing that happens in the industry to everyone. You really overreacted there.
I really want to know why he's so against it though. Did something happen in the past? Is he really just that overprotective of his career? I'm interested(◔‿◔)
Well, okay, he didn't call two members of the same group dating "disgusting" but weird. And I get that it's like that to him because he sees everyone as family, but still. Saying that straight to their faces...
He can be mad about the fanfic all he wants, he can be mad about people using him for their fantasies, he can be mad about someone actually giving that stuff to them like he would enjoy it, I don't care and I understand his frustration. He couldn't have known someone in his group actually liked it and wrote it himself. But that comment just really rubbed me the wrong way
This dude was really groping the guys ass and dick from the moment they met like??? I know your job is to massage and touch people's bodies but know your boundaries bitch