Hanazawa Ritsuki, a freshman in high school, came to know of Sakura Yuu in the early summer of her first year of high school. Sometime later, around summer, Ritsuki witnessed Yuu crying alone in the school building as the sunset. Since then, Ritsuki couldn't ever take her eyes off of him. What was the meaning of the tears and expression on his face? Ritsuki seeks to know the secret of the clumsy hero.