Dohun did that to confirm whether what Seongmin was saying was true. And it was, Yuwon won’t wake up from anything you do to him, besides getting water thrown on him. Seongmin is fake in the sense that he only shows his good side to Yuwon. He lied and said that they never talk shit about yuwon in front of him, he’s actively participating in the conversation though by not defending yuwon. Seongmin is the type of person who wants to appear as a savior to the person they like even though he never does anything to improve yuwon’s treatment at work.

man I thought dohun was just being a pervert when he groped drunk yuwon in the car but it seems like he was confirming seongmin's words huh the fact there were hints about this all the way back in season 1 really does make me impressed with jakpil more lol s1 dohun does so much shady shit u can't help put yourself in yuwon's shoes and wonder if this guy is even human but now that his mentality for his behaviors is being revealed the reason he does those things make so much sense (even if his justifications are weird lol). it really does make me feel sorry for yuwon tho it feels like he will never be surrounded by good people in his life and the people who seem to care about him just disappear or hide things from him