The story of a teenage boy that obtains the power to rewind back time. The heir to a wealthy and influential family, Sawatari Rei finds an antique pocket watch in his house. Shortly after, he dies. Or at least he would have died, weren't for the fact that this watch has the power to rewind back time. That day, he decides to use the pocket watch for two purposes: to make life interesting, and to lose his virginity.