if im understanding correctly that you're frustrated with jeongmin, then i have the complete opposite of your opinion, that's funny. im more annoyed about juwon's behavior, about him avoiding jeongmin and not explaining what was bothering him. maybe this is related to our life experiences, this kind of thing (avoidance) makes me much more pissed than pure ignorance (jeongmin not knowing that he needs to show and tell).
Jeongmin didnt lie to him about who he met though and you will see in about 2 more chapters that. Juwon made up assumptions about everything on his own and started avoiding him without communicating as well, he was mad jeongmin “lied” and didn’t communicate when he didnt lie and juwon didnt communicate also
...hate to be that person but.. fr though he shouldn't have been the one to suddenly apologize and explain his situation and suddenly they have makeup sex. While he is at fault for not communicating, jeongmin didn't really even show or communicate his feelings before. Actions and words can't speak if u don't do it. Along with the fact he wasn't being very reassuring leading to juwon misunderstanding. I just don't like the fact he got all this jealousy and now they're gonna have sex like he wasn't also at fault. Its probably gonna be explained next chapter but i'm a bit frustrated rn. Don't mind this ahahah