Sangwoo x Yoonbum (SMUT)

The beginning.

(This is a fan story, not the real one! Also I haven't read that far into the manga yet!)

Sangwoo woke up. It was around, 10am.
He yawned, sitting up, looking to his inside. He seen a sleeping Yoonbum there.
Sangwoo got up, stretching. He then got dressed, walking out of the small room and into the hallway.
Yoonbum woke up a few hours later, getting up and also getting himself dressed carefully.
He was obviously nervous and really scared.
He got up and him and Sangwoo went out for the day, going out to the nightclub and shit.
At around 4pm, Yoonbum was shoved into a closet by Sangwoo, told to be silent and stay their until Sangwoo would let him out.
As time passed, Yoonbum began to hear moaning, but not from a girl, from a boy. But it wasn't from Sangwoo, it was a random voice.
Yoonbum peeked out of the closet only to see Sangwoo fucking some random guy. And that kinda hurt him.
His eyes widened as he watched and he immediately fell back against the wall when he seen Sangwoo notice to him and grin.
Sangwoo stopped, getting up and dragging Yoonbum out.
"How about we three have a threesome, hm?"Sangwoo said in his deep, manipulation tone.
Yoonbum began to tremble, getting scared and glancing at Sangwoo and then the random guy, the guy looked young and healthy.
Sangwoo grabbed the end of Yoonbums shirt, dragging it off of him. Before doing the same with his pants, leaving him in his black panty like boxers.
Yoonbum shivered looking up at Sangwoo.
"S-sangwoo please.."Yoonbum mumbled, scared. He knew after this they'd be murdering this poor man.
Sangwoo ignored Yoonbums request, picking him up and taking off his boxers of sort and settling him right ontop of the man's dick before dropping him, making the man's dick shove into him.
Yoonbum teared up in pain, whimpering and clenching his teeth together.
The man was surprised, looking shocked as he looked at Yoonbum.
After a few minutes, Sangwoo was fucking the man mercilessly, while Yoonbum was forced to ride the man. And the man just laid there, moaning. The room was full of moans, creaking and the sound of wet skin slapping together over and over again quickly.
The loudest of them all was Yoonbum, him also being the whiniest. He occasionally complained of it hurting.
The next day, When Yoonbum woke up, the man along with Sangwoo was gone.
Yoonbum got up, got dressed and walked down to the basement before seeing the man chained up to a metal pole and Sangwoo sitting on a chair backwards, facing the man with a knife a chain in his hand that was connected to the man's neck that had a chain wrapped around it, so if Sangwoo decides to tug on it, it'd choke the man a bit.
Yoonbum seemed scared, walking down next to Sangwoo and looking at him. "What're you doing?.."He asked shakily.
"What I always do after I bring a man or women home, murder them cruely."He said calmly.

(519 words QwQ)