Sayoko is a kind and good-natured full-time housewife. My husband and I have been sexless for the past few years. My mother, who has entered the horny period as a woman, has a daily routine to masturbate during the day when her only son is going to school. One day, my son's classmate saw it and grabbed my weakness. Using secrets that she doesn't want anyone to know, she turns into sex slaves for her classmates with strong sexual desires... Their demands continue to escalate. To be forced to take a ridiculous action at last!