Aoi Kururugi is earning many views by uploading butt training videos titled "Kururugi Channel" in which she shows off her hipline. Of course, Shota, who loves butts, couldn't miss it, so it has become his daily routine to check it out every night. One day, while playing in the park, he accidentally bumps into Kururugi, and they quickly become friends, and he starts hanging out at her house. As he watches her video stream, Shota's penis gets hard from her overly erotic butt. As he keeps trying to figure out if he can calm her down, the play becomes more and more obscene...