Like why?

Idk why people are mad at the mc for doing it with Mr. Han because him and Hwi weren't even in a relationship in the first place which doesn't consider as cheating. Plus, he liked him for a long time considering that he even gets hard and jerks off whenever he sees or thinks of him, like how could he not do it? I get that its wrong and that there are other ways to solve the problem but the mc just wanted to confirm his feelings towards Mr Han if its romantically or sexually which is why he did it. But it helped the mc realize his true feelings between the two of them. I'm just happy that both of them have talked about it and are just happy with each other. ╮(￣▽￣)╭