idk about the black hair guy, but didn't the white hair guy adopted to be married to mc? so i quite understand his obsession, like you were adopted and raised solely to be that girl's husband, of course, different people, different mindset but this guy seems set to it, then the girl died and you lose your purpose. kinda like every mc/villain who was raised to be empress only to have that title taken away from her, of course they would develop unhealthy obsession
The white haired guy isn't obsessed with her tho he actually hated the position he was in idk if he resented her tho that im not sure of but after she died the fls dad just told him to live however he wanted. he said he could leave or stay and do whatever he wanted and he wasn't stripped of any position, he never met the fl when she was a kid he doesn't know her or anything about her so he can't be obsessed with her not once in the story had it ever mentioned that he was obsessed with her.
The black hair i could lwk understand, he couldn't feel emotions his entire life and she managed to cure him from that and that's completely reasonable to fall in love.. White hair tho..? I have no idea honestly, I dont even think they interacted with each other much in the past and if they did.. She was really young, like probably around five, and never met again after that. So he literally has no reason to be obsessed or in love with her at all, just seems like author wants to force a love triangle for some reason.
Im crying like what's wrong with the black haired guy and the white haired guy??, none of them even have any sort of chemistry with the fl especially the white haired guy because atleast the black hair guy was married to her for like a few months and then they got divorced but the white haired guy doesn't even have any sort of relationship or reason to be in love with this girl, he doesn't know anything about her and he's inlove?? And like why do they think that the blondie who's literally like her brother BTW is inlove with her like bro even if he was y'all wouldn't stand a chance they legit actually have history and it would actually make sense