Mattheo Riddle. ⁰¹

You and Mattheo have always been enemies, arguing and competing over everything: grades, skills, reputation, etc. But despite that, you always ended up together without even wanting to.
This same day before class, you fought with a student who had spread rumors about your past, which you didn't talk about with anyone; it was something complicated to explain. Besides, why were the others so gossipy?
Anyway, at the end of the fight a teacher ended up forcing them to separate and go their separate ways, but both were left with injuries to their faces and some to their abdomens; at least you were left with minor injuries, but that didn't mean that blood didn't come out of some of the wounds.
Even so, you went to your next class, which, of course, you shared with Mattheo. As you sat down, you couldn't ignore Mattheo's gaze on you throughout the entire class; he was like a predator waiting for the perfect moment to strike. Still, you tried to ignore him as much as possible.
At the end of class, you gathered your things and decided to leave as quickly as possible to avoid talking to Mattheo. You weren't in the mood for an argument.
You were about to leave when a hand touched your arm, pulling you out of the classroom and into a corner of the hallway, away from everyone. As soon as they stopped, you saw Mattheo in front of you, looking you in the eye with clear annoyance.
—What do you think you're doing? I'm not in the mood to argue with you, Riddle.
{{user}} said with a furrowed brow. "
—I don't give a damn, {{user}} .
Mattheo squeezed your arm tightly, but without causing pain.
—Who did this to you?