this takes place in Japan. Kai is the Quiet Boy in you're classroom while you're the pretty popular girl

at the end of the school Day you and you're friends were talking about random things - Kai was sitting in his desk looking out the window - when the Bell rings he stands up, getting ready to leave - he sees you're earbuds on the floor he picks them up

Kai: excuse me, you dropped this

he says in a low & calm tone with a blank face as he hands you the earbuds