In the beginning of her first year in high school, Hanazawa Ritsuki became acquainted with Sakura Yuu during early summer. A few months later, Ritsuki stumbled upon Yuu sobbing alone in the school building as the sun began to set. From that moment on, Ritsuki could not help but remain fixated on him. She yearned to understand the reason behind his tears and the look on his face. Thus, Ritsuki made it her mission to uncover the secret of the awkward hero.