[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

Jack sits down on his chair and lets out a loud breath, lying his head on top of the desk. 


He knows he’s nothing but a friend to the other. 


He knows it’s more than he could ever ask for. 


But he can’t stop his heart from hurting every time he hears the words. 


He looks up and his literature teacher is looking down at him. 


“Hi, sir!” He straightens up on his seat, bowing at the older. 


“Hi. I’ve heard you didn’t take your test last night. What happened?” 


Jack fights the urge to roll his eyes. He doesn’t want to talk about his test. He did it a lot already. 


He doesn’t have time to be scolded for it, he knows he screwed up. 


“I’m sorry, sir. I went all the way there, but had an emergency and ended up having to leave.” He explains. 


“Oh, I see.” The teacher smiles down at him. 


Jack is really thankful for him. He’s one of the teachers that helped him figure out his passion, someone who really supported him when he decided he wanted to study art. 


Chapter XXXIII