Michiru, who is married to Yuichi who works in the same department, doesn't get along well with her boss at work, Oki. He is an overbearing man who is a sports-oriented guy and it is normal for him to force her to work and go to drinking parties. On a Friday, the day before their trip, Oki takes her husband out drinking until late into the night under the pretext of entertaining his clients, and ends up staying over at her house. With their trip plans ruined, Michiru takes out her anger on Oki. Oki responds, pushing Michiru down and trying to reason with her body. Michiru resists, but she is unable to escape from Oki's hands, and gradually the waves of orgasm begin to wash over her...