Kasumi, a mother in her fifties who exudes a beautiful and elegant atmosphere, is a pervert contrary to her appearance. Her mother, who repeats lewd acts with her only son Koji night after night, can't wait for her son to come home and indulges in intense masturbation. Kouji returns home with his friend Takashi who is covered in mud. Mother and her son put her friend to bed and have sex with her. Takashi, who witnessed the lewd scene, returns to tell her his lustful thoughts, and the lustful 50-year-old mother boldly spreads her ripe pussy and seduces Takashi.
