Reika's daughter and son-in-law are moving out of their apartment, which is scheduled for demolition. Until they find a new place, they decided to live with Reika. For Reika, who had been lonely at home after her husband passed away, it was a joy to live with her daughter and son-in-law. However, there was an issue with the couple's nightly activities. The son-in-law wanted to have sex, but his wife wouldn't oblige. That night, they didn't succeed again, so the son-in-law drank alcohol and masturbated. Reika caught him in the act and scolded her son-in-law. He pleaded, 'If I can't masturbate, let me have sex with Mom,' and cajoled her. Reika reluctantly agreed to just once...
