Shy Norimichi and fast-talking Yusuke are goo-goo-eyed over 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. When things don't go as planned, Norimichi discovers that a glowing multicolored 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.