ok spoiler warning:
park wan ends up getting a scholarship to some school, mjh denies it because he’s like ultra chaebol rich heir x10000 and forces park wan to stay with him and go to HIS university. there’s like a year time skip of them in college and mjh is like hella possessive and obsessive and constantly monitoring park wan(idk if that’s what ur into but personally i like that) park wan ends up getting pregnant and tries to run away to abort the baby because he doesn’t wanna be controlled anymore. Mjh finds him after 2 days and brings him back home and like actually SA him and I really didn’t like this part at all.. trigger warning but he locks him in some annex and puts a bag over his head???? after park wan tries pleads he gets taken back to the main house and is withering away bc he’s a recessive omega, and in this universe recessive omegas can’t birth dominant alphas bc the womb isn’t suited for it. he has a really graphic miscarriage and this is the tipping point for when mjh realizes he needs to treat wan WAY better and more delicately. He slowly starts letting wan heal because wan is traumatized. Wan finds out that his dad died and has another mental breakdown because he’s scared mjh is gonna abandon him now that Wan has nothing. Wan goes to live on a small island Mjh owns and kind of learns to be by himself and heal. There’s a time skip and Wan sends a postcard to Mjh, and this leads to Mjh coming to see Wan and they start a somewhat normal relationship? In the side stories they get married and years go by and they are able to adapt to each other. Mjh REALLY changes for the better though. He doesn’t speak harshly to Wan anymore, spoils him, is considerate of his health, etc. and he always gives him words of reassurance in his own way. Sorry for the long explanation!! I left out some details but this is the main gist :) I recommend reading it it’s an emotional but worthwhile read.
Wan (Omega MC) has only ever been with Mu Jeonghoo. During college + epilogue/side stories he gets hit on a lot because of his looks, but pretty much since entering MJH’s house he’s only ever interacted with him.
But, fair warning, the ML does SA him. So he’s not really a good guy either lol Though his demeanor changes for the better later on

From what little I've read of the spoilers, the raw version, and the novel, this should be in the horror and tragedy category, not romance.