Sakura Kousuke is a boy determined to discard a past steeped in regret. He transfers to a new school for his second year of high school, hoping it will provide an opportunity to clear his conscience. However, unaware to him, the arrival of five other "Sakura"s in his class will drag his past into the present, compelling him to confront himself, his former friends, and a girl who, despite being Kousuke's complete opposite in personality, knows him better than anyone else.