Mao is a trading-company supervisor preparing to marry a coworker and leave her job in the fall, but she first wants to make her imported product a success. She despises her boss Oki, who insults her as incompetent and claims her looks earned the promotion while constantly groping her breasts and ass. Forced to drink with him one evening, she is drugged, stripped while unconscious, and sexually assaulted. Despite her revulsion, his technique and cock repeatedly make her climax, and she eventually begins craving him both at hotels and inside the office.