Since losing her husband, Nobuko has had no choice but to soothe her body's throbbing with her own fingers. However, before she knows it, Nobuko's desire for cock has turned into a seductive charm that bewitches men, captivating her son-in-law who lives with her. One night, the son-in-law loses control of his reason after witnessing Nobuko masturbating. Whenever his wife isn't looking, he tries to force a forbidden relationship on her. Torn between the guilt she feels towards her daughter and her womanly instincts that yearn for cock, Nobuko must make a choice...