We have basically Captain America, strong, handsome, kind, loyal to a fault and a mid FMC that breaks up, checks notes, because he wanted too much sex with her? A guy that women kept throwing themselves at and the FMC, "well, you know what? he's too perfect, his dick is too big, he is too successful, he treats me too well and I really need a guy to slap me around and be a jerk to me." But then, this massive daddy issues girl starts falling (make no mistake, the side story was going to be the end of the manhwa, i bet, falls for the young pup that worships the ground she steps in and has been carrying a torch for years and whose balls have barely come down. So, a Captain America man, or a sporty k-pop singer that has been waiting for her forever... pffff... it's non-sensical...
So, they both see each other across the street, but only his wife grills him? He doesn't know his co-worker is the wife's cousin and he suspects they might be having an affair (they are not) but he doesn't even ask? I mean he has been finding their relationship strange, but even after seeing them having dinner together he just lowers his head to his wife and doesn't even ask anything? At this point he still hasn't done anything but lying which is also what his wife has been doing.... Nah...