After the company run by Ao's brother-in-law collapses, he disappears and leaves her husband, a co-guarantor, buried in debt. Her husband asks company president Tabuchi for a loan, and Tabuchi agrees on the condition that Ao work as his secretary. His demands escalate until he asks for sex, but Ao refuses. The loan is then withdrawn, and her husband is pushed aside at work. Cornered, Ao has no choice but to become Tabuchi's personal “sex-relief secretary.” Under his control, she is trained to beg with filthy words and gradually submits completely.