Katsu is asked by her mother-in-law Saori to use her aunt Miyuki’s house. After seeing Miyuki’s masturbation there, Katsu has a relationship with Miyuki as it is. Saori visits her sister Miyuki’s house, worried about the two who can’t get in touch with her. What is her action taken by Miyuki, who is surprised at the sight she sees but another emotion springs up?
