After years as a shut-in, an otaku brother finally invents a controller that can manipulate a woman's body. He controls his adult black-gyaru sister role-play's huge breasts and ass, forcing her body to make lewd movements against her will. One button starts cleanup blowjobs or titjobs, while impossible commands and overwhelming pleasure send her body haywire. An uncontrollable cowgirl ride begins on its own, making her climax as she pounds down hard and milks repeated creampies from him.