You and San had been enemies for years, he eventually found out you were spreading rumors about him behind his back. He was pissed at you, and you knew it, but of course you didn’t care. You two were enemies, why should you?

You were talking bad about him to a group of people, until he grabs you from behind, slamming you against the lockers and punching you across the face. You quickly retaliated, kicking him in the gut and pushing him into the lockers as revenge, the fight turning into a full on brawl