(A slow romance between two naive boys) After a couple of chance encounters, Lee Sungyeol and Kim Myungsoo quickly become infatuated with each other. Yet, neither are willing to admit their feelings go further than they'd like. The cool, quiet Myungsoo is clearly attached to the childish, joyful Sungyeol. Myungsoo's never shown this much emotion to anyone, while Sungyeol has never been this serious in his life. What will happen during their high school lives?