Scaramouche and you were rivals.

The both of you pranked each other, going as far to bicker in the middle of class, dumping water on each other when they go in class and so far just bullying each other.

But in the 5th year of highschool, people get chosen by fate, to be binded together, a red string at their pinky finger.

As you follow your red string, you find out it was Scara.

Scara teases you the whole day, but deep in, he's glad you're his soulmate. Now, you're his.