

"Sharing every heartbeat."
Overview
A group of close friends who attend a private school all have a debilitating crush on the sunny star pupil, Sun-ah. The only member of the group who claims not to is Jin-woo, but he ends up loving her as well.

Hwang Gyu-chan
Yong-rae

Park Sung-woong
Jin-woo's Father

Shin Eun-jung
Jin-woo's Mother

Jo Dal-hwan
Technology and Home Economics Teacher

Shin Gi-ru
Geography Teacher

Lee Seon-min
Homeroom Teacher

Son Woo-hyeon
Sun-ah's groom

Lee Ju-seung
Senior