I have this idea in my head for a few days already and I remember vaguely where I had seen it, probably in a movie I watched a couple of years ago. So here's the plot:
Jaejoong is the unlucky one. Destiny chose him as the human with all the newborns to be the one who'll have the obligation to carry on the bloodline of the devil (Yunho).
After turning sixteen, he started to have the same dream every night. A man with almost burning skin between his parted tights, abusing the most intimate part of his body. He could never have a good glare at the man's face, there's always shadow hiding it. At first Jaejoong was scared and confused, but with time, he started to ignore the dream.
The night of his eighteenth birthday, he gradually started to see the face of this mysterious man who kept appearing in his dreams. No long after, he was getting sick, nausea, lost of appetite, lost of weight, etc.
What Jaejoong overlooked was that those dreams were actually real. Yunho would come see him every night, bed him and leave at dawn.
When his health kept deteriorating, his parents (friends or whoever) forced him to meet a doctor and on his way to the hospital; he fainted on the side of the road after seeing Yunho walking up to see.
After his blackout, he found himself in a darkroom with fire along the wall. Everything felt so familiar but strange at the same time, everything around him was freaking him out starting with Yunho sleeping next to him.
And the following events are up to you… ^^
Plot to be adopted by
chaebol