Yui lives harmoniously with her kind husband.Her only complaint was that her husband wouldn't let her in behind her during her nightlife.One day, Takeru, her senior from university days, moves next to the apartment where Yui lives.Yui, who is delighted with her reunion, takes care of Takeru and brings her home cooking, but Takeru lusts at her defenseless Yui and attacks her from behind.Yui, who was pushed up from behind by a violent piston that her husband does not have, cums many times, and she gradually loses her resistance.