Jin U and his friends, who are each experiencing the peak of their puberty, have their own unique interests and causes of trouble. The one common interest among them is Seon A, the model student who embodies both grace and beauty. To them, Seon A looks like an unattainable dream, even though she’s in the same class.Despite their contrasting personalities and academic performances, Jin U and Seon A develop a close bond by showing interest in each other’s different sides. Their relationship navigates through the lovey-dovey and bittersweet phases of high school and into the heart of their poignant youth.