Hiroshi visits his girlfriend's family home in the countryside to greet her about her registration. When I heard about the mother who greeted her, I heard that her father had remarried, and she was young, beautiful, and intelligent, and was her mother-in-law. That night, with her kindness, Hiroshi was allowed to stay at her parents' house, but after witnessing the beautiful mother's naked body after taking a bath, Hiroshi couldn't help it.