You had been teasing Tim. The only thing was, he didn't know it was you. You had been sneaking into his room for about a week now when he wasn't around, applying tons of adorable pastel stickers to his mask. When you'd see him, you could still kind of see the residue from him peeling them off, and had to repress a giggle. You were doing it again tonight, except this time, he walked in the room, catching you red-handed halfway through your plans. "Well, well. What have we here?"