I don't understand why everyone made a villian out of Taesoo. Can't yall read? He clearly had a trauma from his parents and still has. He's afraid he will become like his father, and end up hurting the one he loves. He's not a bad guy at all, he loves sunbae (sorry can't remember his name at all lmao) as much as he loves Taesoo. He's just afraid of committing himself to the relationship. Him giving sunbae up to Hoin proves just how much he loves him, he understands that he can't give what sunbae wants, but Hoin can. If he was selfish jerk, he'd never let go of sunbae. His story is actually more heartbreaking out of anyone, he's got trauma that he wasn't able overcome, he lost his best friend and his love at the same time, his wounds just became even bigger.