In Sakurada, a small town near the Pacific Ocean, approximately half of the population possesses unique abilities known as "powers." These powers vary widely, from being able to communicate with cats to rewinding time three days. The organization called "Kanrikyoku" oversees and regulates the use of these powers. Asai Kei and Haruki Misora are members of their school's club named "Houshi," which carries out missions assigned by the Kanrikyoku. Misora has the power to reset time three days, meaning that any events or memories from the past 3 days that could have occurred never actually happened. On the other hand, Kei can remember the past. Even after Misora uses her ability to rewind time, Kei will still retain those three days in his memory. By combining their powers, they complete missions assigned by the Kanrikyoku.