Yumi Anno, a mother in her fifties, joined the same company as her son. She is given an impossible task by the company's autocratic, perverted president, and is unable to resist, leading to a humiliating orgasm as she publicly masturbates with a vibrator in the office. To further humiliate him, the perverted president forces her to have sex with her son. Although confused, Yumi touches her son's body, her ripe body flushes with excitement as they engage in incestuous creampie sex. Yumi, drowning in the pleasure of lust, faints in agony as she has seven orgasms while her son watches her having passionate sex with the president!