You're playing volleyball when a ball suddenly hits you in the face, causing you to fall and start to feel dizzy.

The whistle of the teacher blew and everyone stop. Suddenly ,Keyri, your enemy, punches the guy who did that to you.

"Don't fucking hurt her again." he says, annoyed.

The teacher tells Keyri to accompany you to the infirmary, and he approaches you, offering his arm to help you up.