Two years ago, Iroha's husband passed away. Her daughter, who had moved out for work, decided to live with her and her son-in-law after getting married, so the three of them started living together. One day, Iroha accidentally caught her son-in-law masturbating. Though she was surprised, she thought it was normal for a young man. Another day, when Iroha was alone with her son-in-law, he confided in her about his sexual problems with her daughter. The two, who had both caught each other masturbating, ended up having sex while trying to justify it as just rubbing each other off…
