This is my speculation so it might be a bit awf but so I thinking he’s the bf and hiding it with a grudge and being like oh she doesn’t remember me so I’ll be cruel to her or something, you know in some tropes where they have feelings and they be mean to hide it so maybe it’s like that and because it would be weird and incestous. BUT yes 1000% no chemistry maybe he is just some guy who noticed she was Korean and is pissed he is where he is

Who is the end game? The father ? I read somewhere that father is the ML ?