A six-year age gap separates two fellow college mates, Gae-bin and Ji-won. Gae-bin, who’s head over heels for Ji-won, can’t seem to hide her feelings for her senior while Ji-won's feelings, on the other hand, seem rather murky. One afternoon, as the two sit on the roof, chatting and eating ice cream to cool off on a hot summer day, Ji-won suddenly reveals to Gae-bin that she has a crush on someone from their college.
