[Yakousei Fanclub] Using a Brainwashing and Modding App to Turn My Cheeky Little Sister Into a Convenient Onahole

A smirking brother gets his hands on a brainwashing and modding app and decides his cheeky, dismissive little sister would make the perfect personal plaything. Nanami's bratty defiance melts into dopey, tongue-out devotion as her chest balloons into enormous, jiggling tits that draw his hands immediately, and she happily offers that huge bust up for paizuri before taking his load and bending over for whatever comes next. With her stockinged legs splayed and her blissed-out stare promising yes to everything, his only question is what game they should play next.