Keiko, 27 years old... Five years after marrying her husband, she spends her days in a fixed cycle every day.At some point, the couple's activities became once a week, and once a month became half a year, and she began to forget her happiness as a woman.One day, Keiko becomes interested in a leaflet about a business trip massage in her mailbox.When she was given a special serum that had a rejuvenating effect, it turned out to be an aphrodisiac-infused oil.Without telling her husband, Keiko regularly attends a 'medicated massage'.