Dave sat on the couch, John practically in his lap. They were watching one if John's shitty movies, all because of John and his puppy dog eyes. The cool kid sighed, looking down towards the floor, then back at the movie. He was bored but didn't want to burst John's bubble.
A smile plastered to his face, John looked at Dave, a flirtatious look in his eyes. Dave tilted his head, confused.
"John?"
"Yes, Dave?" He replied, sounding almost lustful.
"Are you.. alright?"
"Yes, I'm fine~"
Dave cocked an eyebrow. John giggled lightly, straddling him. A slight blush made it's way to his face. He wrapped his arms around Dave's neck, swiftly leaning forwards and kissing Dave passionately.
It was at this moment that Karkat walked in.

The troll's heart shattered into a million pieces,his eyes widening. Red tinted tears welled up in the corners of his eyes. They gathered and began to fall, leaving red streaks standing out against his grey skin. His hands went to his chest, his feelings thrown out the window.
"Wh... why..? I thought you.. I thought you loved me?" He questioned, his voice husky, full of hurt. His eyes flicked up to look at the other, examining his pale face, looking for some answer, something to show him that he didn't mean it. The other didn't say anything, turning his back.
He sniffled, his gaze turning back to his feet as he found nothing. He ran out the room, confused and hurt at what he had. More tears fell, he fell to his knees, sobs escaping his lips.
He gripped his fluffy black hair, tugging at it as he began to mentally assult himself for 'not being good enough for the cool kid' and being 'a pathetic mutant-blood that no-one cared for'.

Dave sat there, too ashamed, too unsure, to comfort Karkat. He rubbed an arm with a pale hand, grinding the red fabric of his god tier outfit on his arm. Tears prickled in his eyes as he grinded his teeth. He blinked them away, his gaze drifting off to the floor. He let out a sigh, knowing that he had /needed/ to do it and that he didn't mean what he said. As he gazed to the floor, old memories coming back- memories of the good times he and Karkat had had: the times playing and helping the Mayor, joking around, the Dick Ouija. A small smile made it's way onto Dave's face,a stray tear falling unbeknownst to him. He sighed again, the smile sliding off. He glanced towards where Karkat had ran off to, hearing him crying in a different room,probably sobbing mess. His heart tugged, knowing that he shouldn't have done what he did,no matter what the circumstances were, and that he should comfort his friend.
Dave shook his head, standing up and making his way towards where Karkat had went, a chill running down his spine. It felt like someone or something was watching him. He stopped and looked around. Upon seeing nothing he continued to walk back to Karkat, his mind set on only one thing- to tell him what had happened. Sensing something behind him, he briskly turned around, only to get a knife plunged into his stomach. His eyes widened, a gasp escaping his lips. He fell to his knees, looking up at the attacker.
It was John.
The bucktooth nerd had a terrifying look on his face. It was insane.
"If I can't have you, no-one can," John hissed, "I'm sorry, my love." He yanked out the knife, leaving Dave to die of blood loss there on the floor.
He clutched at the wound, attempting to stop, if not slow down the blood flow. He gasped, coughing. A metallic taste filled his mouth. He cringed slightly at the taste, but stood up and attempted to make it to Karkat in his final moments.
He fell again, this time not able to get up. He raised an arm in the general direction Karkat was in, black dots dancing in his vision before everything went black.