Sulji is madly in love with the boy across her class and is dying to confess to the boy. But  it breaks her heart when the boy already has a girlfriend and she's one step late from him. How will their daily encounter at school after the boy found out that Sulji is madly in love with him?

 Choi Soonyoung is a new senior who came all the way from her old high school, met with an old junior who came all the way from Busan just to build his life. How will their encounter happen? Is it going to be a normal senior- junior relationship or could it be more?