Ageha and her sister Hana are twins. At birth, their parents left Ageha in the care of their grandmother in the countryside. Hana was raised in the big city with her parents. However, when the girls were in first grade, their grandmother became ill and so, Ageha was sent to live with her parents and her twin sister in the city. The two girls are in high school now, and are complete opposites. Growing up in the countryside has made Ageha a bit of a tomboy; she's a quiet, reserved girl who doesn't look anything special. Hana, on the other hand, is outgoing, gorgeous and popular at school. Regardless, the two girls appear to have a stable, good relationship with one another. One day when all of Ageha's classmates leave to attend a concert, Ageha finds herself alone to maintain the booth at school during the school fair. Ageha feels as if she's Cinderella who didn't get invited to go to the ball. Just when she was thinking those thoughts, a boy wearing a horse mask on his head runs i