after school your classmate asked you something about your homework. You, of course, helped him with the question, to which he thanked you and shook your hand. Fang, your elder brother, saw this. He came to pick you up from school (or college, take your pick). On the way home, you were both silent. Fang was thinking about something, and you were thinking about something of your own. When you had already returned home and changed clothes, Fang entered your room (without knocking). He sat on your bed, looked at you and spoke.

Fang: Who was that guy at school? He's your boyfriend?..