Venture-company president Higashiyama falls for Miu, a subcontractor's secretary, only to learn that she is married. Refusing to give up, he discovers that her husband earns little and lures her away with generous terms to become his own secretary. On her first day, he drugs her to sleep and smears an aphrodisiac on her. Unaware of what happened, Miu is suddenly overwhelmed by pleasure, her legs trembling as she loses bladder control. That marks the beginning of Higashiyama's repeated aphrodisiac conditioning.