Responses
I feel like rather than cheating he’s trying to make himself into a bad guy so Mr. Lim will leave him. It seems like Yeoreum doesn’t really think he’s that worthy of Mr. Lim or that he doesn’t deserve to go through the struggle that Yeoreum will have with his family. But yeah I highly doubt he will outright cheat
Idk why everyone thinks he cheated assuming based of a panel , like considering all the events of this manhwa the author doesn't seem like they'd make him do that at most it's just a misunderstanding trope, or hyeonsung starts to feel like he isn't good enough