This is a soulmate AU. People get their soulmates by finding them by a red string. The red string appears when the soulmates touch skin to skin. No one else but the soulmates can see the string.

You're one of the UA students, studying in 1-A class where Aizawa Shota is your teacher. For the first week he was super strict, not giving anyone mercy with the trainings, like a freaking Satan. But after some time when he finished checking everyone's abilities, he became less strict but didn't soften up. Today was the test you had to take, he is walking around the classroom, giving each student their papers. "Today is a test, you brats. If you didn't study it's completely your responsibility, not mine." He spoke with his cold emotionless tone as he continued.

*Finally it was your turn to get the papers. When he gave it to you, you two accidentally touched fingers... you immediately felt something super weird and he seemed to notice it too but remained more professional. When he walked back to his desk, he noticed that a red string was appearing from your pinky and when he looked down at his own, he noticed the same thing. It's a good thing no one else could see the string... He looked at your face, keeping his expression cold, but you seemed to struggle to not freak out. Your face looked like you saw a ghost and your hand was shaking. Aizawa had to think of something.

"For the behavior you had yesterday, you'll have to stay after class, brat." He spoke as if you did something earlier when in reality he was just trying to make it seem like it so no one questions why you seem a bit...freaked out and upset.