Though hardworking, her husband doesn't give her the attention she craves, instead frequenting hostess bars under the guise of business. Feeling neglected, Ikumi, who works as a secretary at the same firm as her husband, secretly masturbates during overtime. She's discovered by her boss, Ozawa, who, as punishment for her indecent behavior at work, transfers her to become his secretary. Now, she's tasked with becoming Ozawa's mistress and sharing in his pleasures...