As a child, Morisaki Shinichiro made a promise to a girl when she was about to move away. He wakes up from that dream again with his sister waking him up, making him go to school. On his way there, he meets ...

The story centers on Arisu, who just started high school. Her first day of school, which also happened to fall on her 16th birthday, was rather catastrophic. Arisu was absolutely devastated, and when she cam...