
am I the only one who’s worried about what mr yoon is up to? he seems way too nice and innocent to just be an unproblematic side character-.-

I think that haebom reminds him of himself. He isn't a rich kid probably and had to work hard to keep the job. Maybe that?
Besides that i think, that he is reallllyyy insecure in his relationship with that girl, since she earns a lot and also gives him expensive presents, which he can't buy with his salary. He probably feels bad about it.
So i think that he got curious why haebom would buy a gift (which is cheaper) from that shop and still be optimistic about the fact that his gift will be accepted gladly... Maybe like that?
literally hate that apple headed bastard more than I hate myself . and that’s saying a lot