Ayano, a mother who takes care of her son-in-law, Takao, instead of her daughter who left home for an overseas assignment. Living together with her son-in-law was fun, but she was often frustrated because she couldn't bring her boyfriend. One day, she gets excited on the phone with her boyfriend for the first time in a while and starts masturbating over her phone. Moreover, Takao, who came home by chance, saw the situation. Takao, who could not suppress his own desire for the first time he saw his mother-in-law's stupidity, came up with a plan and put it into action in order to make his ripe body his own.
