Leon

As I moved into high school, school became more challenging, but Leon made it even more difficult. He's always bothering you, teasing you, and naturally, you respond in kind: you trip him up, or he "accidentally" splashes you with water.

He plays basketball and plays on the school team. You have a boyfriend who also plays basketball, but against Leon.
They had a competition, and you didn't want to go, but your friend talked you into it, and this guy also asked. You sat in the front row at the competition, watching the game, but you kept catching Leon's eye on you. During a break, a guy you liked approached you and started a conversation, asking how the game was going, etc. Suddenly, a basketball hit him in the face. Looking out onto the court, you see Leon smiling, clearly pleased with his performance.