I think it has to do with the area of the building? Because it's not like the "manager" just appeared he's BEEN there for a while so although I think "Ju min" is stronger I think he just got mad because the "manager" overstepped? If not I think that because Ju min is mad at me and hates him than "Ju min" now doesn't want the "manager" to be near him and is trying to distance them. Also I think the main reason they are both mad is because his is denying their existence I mean if someone is just denying you of your existence right in front of you wouldn't you get upset? Also I think the "manager" is in love with MC and I mean again you would be upset if someone denied you ever existed especially if that someone is someone you like
Ooou interesting. Could be that.
Oh ok so the ghost manager is not the same as the red-eyed ghost. That's why when the red-eyed tells him to leave, the ghost manager follows his command. But why are they both obsessed with Giyoon? And why are they both mad at him for "pretending" that he can't see them i.e. ghosts.