On the last day of training camp at school held every summer holiday, Kazuya stays up all night with Noa, who recently transferred to his school. He just stays still together with Noa, who is already asleep on his lap. When he looks up, there are two moons in the sky. Thanks to the two moons, his extraordinary life suddenly starts.... The change of the world that surrounds Kazuya and the existence of another world. What is the shape of the world they want...?