Dania Kashin | DK | school AU

Dania Kashin and Ruslan Tushentsov had been a couple for a year. Both guys are currently in 11th grade. No one knew about it.
One ordinary, boring day, Ruslan was standing near the classroom, leaning his back against the wall and watching TikTok. But suddenly, his classmates came up to him, stood next to him, and leaned their hands against the wall.
—Ruslan, give me your number))
-Why do you need it?..

• just so that it is there, maybe I’ll write to you))..
  "Write it down... " He didn't have the strength to argue, so he silently agreed. At that moment, Dania was standing nearby, watching them with a cold gaze. Since there weren't many people in the hallway, he heard their conversation, and from Dania's perspective, it looked like flirting. A bell rang. Everyone scattered, and when the crowd thinned out, Dania grabbed Ruslan by the arm and roughly dragged him to the far restroom.
  "Danya! What are you doing? " He followed him, barely keeping up. Danya dragged him into the empty restroom and pinned him against the wall.
  -Have you forgotten who you belong to? Why did you give him your number? His voice is hard and rough. Dania was an insanely jealous guy.