Ten years after graduating high school, Ayano Aishi returns to the place where everything began. Now twenty-eight, she lives a quiet life with Budo and Taro, the two men she refused to lose, and their daughter, Aiko. To outsiders, they appear to be an ordinary family,but the past they share is far from ordinary. On the night of their ten-year reunion, Ayano, Budo, and Taro prepare to walk the same halls they once knew as students. Memories linger in every corridor and the weight of what happen.