Yumi, a second wife who lives with her husband and son, is suddenly visited by her ex-wife (Yuki Tanihara). After the ex-wife leaves, Yumi feels something strange in her body... Her drink has been mixed with the blood of a parasitic nymphomaniac. She climaxes with obscene masturbation, groping her body like crazy, attacks the accountant and makes him cum with a buttjob, and even makes her son cum with a handjob! In an attempt to erase the nymphomaniac blood, which is weak to heat, her uncle uses candle torture to make her cum, but the blood does not disappear... In the end, her husband has passionate, loving sex with her, making her climax repeatedly and freeing her from the nymphomaniac blood...!