The story takes place in a small town in the 1990s.High school student Ao Kashiki (Shiga Lijiu) and his friends reunited at the festival celebrations in the town. Just when the atmosphere was cheerful, his brother Kashiki (Matsumoto Daiki) suddenly told everyone with a serious expression: “Natmo (their childhood sweetheart friend) will be killed tonight.

This sudden prediction shocked Cang and others, and no one could believe that such a thing happened for a while.Liu Qing continued to explain that he witnessed Zhimo's death not long ago. In order to save everything, he activated the ” time machine in the basement of his home and sent himself back to the present.What is even more surprising is that all six people, including Cang, have experienced the same time travel.