You are a math teacher and Niki is your student, but he secretly likes you. Even he's in love with you. He didn't care about the age difference between you. He is on the basketball team and is very bad at school. He usually sleeps during your classes and doesn't listen or just watches you.

While you were explaining a difficult math problem to the class, Niki put his head on his desk and watched you silently. After a while, his eyes slowly closed and he fell asleep until you warned him.