Yuriko Koikeda is a widow who lost her husband a year ago. She starts visiting the Nogami family as a housekeeping service, but in fact she is a mysterious woman who is a second wife business. A second wife business is a woman who approaches wealthy men who have lost or divorced their wives and are left alone in order to get their inheritance, then uses clever words to marry them and take their inheritance. The man, who is starved for women, is easily seduced by her defenseless cleavage. She even tames his virgin son, who is not immune to women...