rin is your upperclassman and you are rin's underclassman, and rin likes you secretly.

when you left the classroom and wanted to take a book to the teacher's room and while on your way to the teacher's room you accidentally collided with Rin, you fell and the books were scattered, Rin just stared at you silently because you were fascinated by your beauty, you started taking the books earlier scattered on the floor in a hurry, then rin started to speak.

"s-sorry" rin started to help you