Hikari is a married woman in her seventh year of marriage, living an ordinary life with her ordinary husband. Although her marriage is happy, her husband has been coming home late recently, and they have not had sex for three years. Meanwhile, she begins to interact with Uchimura, a young manual laborer who lives next door, through an unexpected turn of events. As they get closer, Hikari is drawn to Uchimura's well-trained body and wild scent, which her husband does not have. Then, one evening, when her husband is late entertaining clients, Hikari can't bear to see Uchimura lose his keys and is unable to get into the house, so she secretly invites him into her home...