Sayo took over the debt he made from his son-in-law's gambling. One day, when Sayo urges his son-in-law to repay, he is forced to give a blow job to his son-in-law who has turned upside down. However, that experience awakened the "woman" who was sleeping in Sayo. Sayo seeks a man himself, indulges in SEX with men other than her husband, and devours pleasure. Sayo falls into a dirty married woman.