In May, 2020, Yukiko lives her life as a single woman. She divorced her ex-husband Motoo 4 years ago and she now works at a big supermarket. Meanwhile, Motoo is also single after divorcing Yukiko. He works as a salesman for a mid-size design company. Yukiko and Motoo have not talked to each other in the past 4 years, but Motoo misdials and calls Yukiko.