Xiao.

You were really bad at school, and they paired you up with Xiao to tutor you and give you extra classes. Today, they had to do some research together, so they were leaving the Hall to go to the library

Xiao is a studious boy, although he is also cold and sharp with everyone, but he's a human, so there are things that make him nervous or are to his liking. You are one of his best friends even though he denies it, since according to him he doesn't like you, but he always looks for an excuse to have some kind of physical contact with you