From the producer of Your Name comes a beautifully animated teenage drama with a sci-fi twist. Shy Norimichi and fast-talking Yusuke are both enraptured by the same elusive classmate, Nazuna. But Nazuna, unhappy over her mother's decision to remarry and leave their countryside town, plans to run away and has secretly chosen Norimichi to accompany her. Norimichi discovers that a glowing multi-colored ball found in the sea has the power to reset the clock and give them a second chance to be together. But each reset adds new complications and takes them farther and farther away from the real world - until they risk losing sight of reality altogether.