Choi Sulli is a thoroughly ordinary high school girl, who day dreams. A lot. The subject of her day dreams is her crush, resident high school cold genius Choi Minho. Sulli is not terribly bright, and her lack of academic focus means that she’s in the slacker class at school, with her slacker friends. Lee Taemin is her classmate who worships her, alas Sulli only has eyes for Minho, who barely knows that she is alive.

Minho humiliates Sulli at school when he publicly rejects her love letter and tells her that he would never be interested in a girl as dumb and academically-challenged as she is.