After his father and mother's death our protagonist Aiden Kasuga returns to his hometown in Kyoto,Japan to live with his Brother. Returning after 10 years he would soon meet the friends he lost and memories he forgot.But soon after going in to a chat room his school life is going to change.

When in junior high Yamato Yuuta ever being asked to going out by Kobayashi Karin if they win their third year and last concert band concours. Yuuta inquire, how then if they end up losing, and Karin response that she will attend the same high school with Yuuta and won in the next concours so the...