Riko, who lost her husband in a sudden accident, was in the depths of sorrow. Then a man claiming to be an insurance investigator appears and says that her husband had taken out a life insurance policy. Around that time, a young man who had been helped by her husband before comes to visit her. Riko is attracted to the man's sincere demeanor, and, coupled with the loneliness of her own body, they make a passionate vow. However, the two men are members of a fraud group... Her voluptuous body is tied up and played with violently in turns. An exciting tragedy in which a body that is the envy of big-bodied, busty maniacs is tormented and tortured to the fullest.