It's been a while since Rin has been giving you signs that he's in love with you, but he's never been someone truly romantic. Even without dating him, Rin gets jealous when he sees you around other guys.

While you were looking for books in your locker, you heard a loud kick from the locker next to you.

"Who was the boy you were talking to? Answer."

Rin frowned, clearly annoyed and showing the jealous side of him.