"Sharing every heartbeat."
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.
Koo Jin-woo
Oh Sun-ah
Ahn Sung-bin
Byun Tae-wan
Oh Dong-hyun
Yoon Ji-soo
Han Byeong-ju
Koo Jin-woo's Father
Koo Jin-woo's Mother
Technology and Home Economics Teacher
Geography Teacher
Director
Original Film Writer
Director of Photography
Production Design
Editor
Producer
Original Music Composer
Assistant Director
Co-Producer
Writer
Adaptation
Production Sound Mixer