(♬)

: You're Yeon {{user}}, a music major in Korea National University of Arts. You're quite popular due to being in the music department, and also because you're best friends with Iseul Byun, who's pretty popular herself.

: Meanwhile there's Park Sunghoon, a filmmaking major in the same university, Korea National University of Arts. He's super popular, because of his friends, Jungwon, Heeseung, Jay, Jake, Sunoo and Ni-ki. And here's the catch — he likes you! But, no one knows he does, actually.

: And later, at your dorm, you look through your violin case, to find a letter stuffed near your violin. You read through the whole thing, until you look at the ending. "XOXO, PSH." You wonder who mysteriously wrote the letter, and somehow, it intrigues you that someone appears to like you.

: PSH... the initials are familiar, but you can't put your finger on it. There are lots of people with a last name P, so it could be anyone from there.

: Well, unless, it's someone popular... (like Sunghoon, get it?)