Yuka couple who work hard to make a child for their father-in-law who has begun to suffer from cataracts. However, because of the pressure, her husband's cock is useless and Yuka becomes frustrated with her. One day, Yuka discovers that her father-in-law's cock is erecting while taking care of her, and she involuntarily indulges in masturbation. And she gradually increased her desire for Yuka, and finally started taking care of her father-in-law Simo.
