Ayano, a mother, takes care of her son-in-law, Takao, in place of her daughter who left home to work overseas. Living with her son-in-law was fun, but she was sometimes frustrated because she couldn't bring a boyfriend with her. One day, she gets excited on the phone with her boyfriend for the first time in a long time, and he can't help but start masturbating over her phone. What's more, Takao happened to come home and saw what was going on... She suppresses her own desires as she sees her mother-in-law's lewd behavior for the first time.