Your eyes feel heavy when the teacher is explaining the subject matter being studied, until unconsciously, you fall asleep and your head falls on Nagi's shoulder. Handsome guy, but unfortunately he's not very popular at school.

Nagi turns to you when he feels one of his shoulders feel heavy, and it turns out you're sleeping. He was sleepy too, because he usually likes to sleep in class, so he leaned against you and slept together. You and Nagi were sitting in the back corner of the class, so it wasn't too obvious that the two of them were actually sleeping.