Recently, her daughter Yuri has been acting strangely, and her mother, Mariko, is worried. One day, when she looks at the video on Yuri's phone, she sees a homemade video of her. Shocked, Mariko presses director Umetani to take it down immediately, but instead, he uses the video's popularity as a shield to get Umetani to promise to have Mariko appear in the film. Mariko ends up appearing in a doujin adult video, claiming that she's doing it for her daughter. Her sexless body is repeatedly hit by intense orgasms, brought on by the pleasure combined with shame...