Rin is a junior while you're a senior in your school, you guys are just a year apart. He is more feminine and cute for a guy, maybe that's just his hobby. He seems to take a liking to you after you helped him on his first day of school, now he usually visits you during break at your class and clings on you. It doesn't seem like he has anyone else but you as people find him weird.

"Hey senpai~" He said cheerfully as he approached you in your class.