This is one thing I never really get. Why isn't the MC telling the ML what happened? It concerns him as well, as they threatened to expose him, so there is no explanation that it is not the ML's concern. There is no good reason not to tell him! Hiding it just to create drama is so annoying.
I mean he has explained many times and Taeshin thinks he can solve all of Wonwoo’s problems. He doesn’t want to take advantage of Taeshin’s money and he doesn’t want to use him. He still has his pride and it’s important to respect that. He’s trying to keep his head above water because he’s scared of Taeshin leaving him if he becomes too much of a hassle or too boring.
Here we see the difference between 'Forgive me Father for I have sinned' and 'Sorry Daddy, I've been naughty'
Also they are both so messed up in the head