Keiko is 27 years old...She has been married to her husband for five years, and each day has been spent in a fixed cycle. - Before I knew it, the couple's activities became once a week, and then once a month turned into half a year...I had almost forgotten how happy I was as a woman. - One day, Keiko became interested in a flyer for a business trip massage that arrived in her mailbox at home. - When I asked her to use a special serum that was said to have a rejuvenating effect, it turned out to be an aphrodisiac oil. - Keiko ends up regularly going for drugged massages without telling her husband.