Due to his tough exterior, the country bumpkin transfer student, Shin I-seok, is plagued by sinister rumours.

He falls in love at first sight with the school's top student, Jo Hae-ju, and witnesses her sly secret. His curiosity about her gradually grows like a snowball.

Shin I-seok, a genuine tomato, begins his onslaught of unrequited love for Jo Hae-ju, who is like an apple, only red and mean on the outside but white and sweet on the inside!