The young wife is undergoing an apprenticeship in both sex and housework!

Hiroki is laid off and has to stay at his older brother Takashi's house while looking for a job. At home, there is a beautiful wife, Waka, who is incongruous with his arrogant brother, and Hiroki wonders why she married Takashi. Waka has never been with a man other than Takashi and is naive, and there is no way her sex life with the arrogant Takashi will go well, so she loses confidence. It's a waste because she has a beautiful body and is full of charm. Thinking so, Yuki decides to teach Waka about sexual pleasure in place of his brother...