Responses
He doesn't trust Si woon...si woon basically disappeared on him without a word and some other stuff we learn in the future explains more about it. But Tae min kinda feels like hes at a disadvantage and he only has this secret he lost basically everything and is desperately trying to protect himself he's not certain what Si woon will do once he finds out or if he will like maybe try to hurt him with that information. he feels like Si woon is just lying to him again and playing around with him.
without spoiling (if its discovered in future chapters) : Why does tae-min want to hide the fact of his identity to woojin? i mean it wouldnt really hurt to tell him the truth right? So why isn't he?