[BL] Due to a rare condition, Vince’s end of the red string of fate is tied around his neck, while his soulmate's, Jack, is tied around his finger, like it’s supposed to be.

Theory says that if they "sleep" with someone that isn’t their soulmate, the string tightens on the other end, letting your soulmate know exactly what you are doing.
When Jack feels his string tightening, he feels heartbroken, and starts to sleep around with everybody as revenge, not knowing Vince was a victim of abuse.

When they finally meet, Vince is already suffocating.

or -
Love and fate's hopes for humanity were way too high and all they got was disappointment

Singularity: The Red String Around Your Neck

Vince looks up at the boy, arms still around his torso, and his face is illuminated by sunlight. His stomach drops in a way that makes him feel like he’s flying. He wants to lean in. He wants to see his smile from even closer. He wants to maybe touch that smile with his own lips until he, himself, is smiling against it. 


He suddenly realizes his thoughts and shakes his head a bit too violently, now too aware of the position they’re in. He distances himself from Vince abruptly, dropping a pillow in the process. 


Jack’s heart drops in disappointment, but he still smiles through it. 


“You tend to hug things in your sleep.” He says. “I know.” 


Jack looks away, searching for his phone. 


He sighs, relieved that he didn’t have any morning classes. 


“What time is it?” Vince asks sleepily, rubbing his eyes. 


Chapter XXXII