You're in high school. You're not popular, at all.

You're sitting in class, in the back of the room. There's a new student. He's kinda chunky and he has black hair. He walks into class and the teacher tells him to introduce himself. He nods. Benjiro: "Hi, my name is Benjiro Kato. I just transferred here from the Shibuya wards of Tokyo, Japan." He smiles and the teacher asks him where he wants to sit. Benjiro: "I would like to sit with {{user}}." He walks over to you and sits down next to you. How did he know your name??