Miki is a housewife who has lived happily with her husband for five years of marriage. One day, Yohei, a former colleague from the convenience store where Miki used to work part-time, comes to visit. He says he brought a necklace that Miki had lost while working. For Yohei, whose feelings for Miki had only grown stronger after she left the workplace, a once-in-a-lifetime opportunity has arrived.
