The popular doujinshi "The Day I Mount My Son" by Gonza, which lewdly depicts incestuous sex between a mother and son, is being adapted into live-action with exclusive actress Rinrin Kinoshita! One day, Miyuki finds an erotic video of her own genitals being played with on her son Natsuki's phone. When she confronts him, he says it was filmed as a prank ordered by his friends… To protect her son, Miyuki appears in various play recordings including fellatio, cosplay, and object insertion. Before long, a desire to orgasm using her son's penis wells up from the depths of her body...
