Please, may the little light in Yamato never go out. Childhood best friends. Two halves of a whole. Yamato and Kakeru. The clock has rewound to their elementary school days as a carefree Kakeru tries his hardest to befriend the quiet and reserved Yamato. But as they get closer, Kakeru soon realizes Yamato is keeping something buried deep within—a secret related to his father, who is now in a coma. With Kakeru at his side, can Yamato finally face the feelings that have been haunting him?