The mall looked completely abandoned. Were there really people inside? People with access to this kind of tech? The doors were the only hint, being sleek and metal, although this inconspicuous enough that someone could easily walk right by without thinking too much about it. Anna hardly needed to slam her fist on the door, as it opened immediately afterward, sensing the presence of the device and opening automatically. As Anna looked in, she would see... not very much. Inside was a nearly-featureless metallic room. The only things besides smooth, grey walls were an identical door on the opposite side of the room, a plain-looking sign in the center reading, "Please wait here" and two red rings painted on the floor just before the sign.
As soon as Anna would walk in, the doors would slide shut and lock behind her. One of the first things the girl would notice is that the metal floor is not nearly as cold as it looks. In fact, the material is perfectly comfortable to walk on barefoot; much better than the hard concrete she just came from. It was slightly warm to the touch and almost... soft to tread upon. Once inside, Anna would notice one other feature: A camera in the corner pointed down at the center of the room.
There was nothing to do. She couldn't leave, couldn't pry either of the doors open, nothing. The sign might as well not even be there, because waiting was her only option. However, perhaps it was meant to ensure she waited near the painted rings on the floor, because once she was near, the device on her back activated once again. Just as it had stopped her from covering her body with her hands, it now used the same force to align her feet with the rings, which were just slightly more than shoulder-length apart. With her legs spread and held in place, the metal in the rings opened like the iris of a camera and close again, locking her ankles in two cuffs set into the floor. As soon as this was complete, and Anna really was restrained in place, the floor beneath her opened and mechanics rose up around her. The machine beneath her feet enclosed her legs in metal and pulled her arms down as well. When the bizarrely advanced symphony of mechanical arms was through manipulating Anna's position and descended back into the floor, the girl found herself restrained and displayed in what looked like a small cart on wheels.
Finally, the door that lead further into the mall slid open silently, and Aurora stood in its open frame. Unlike the last time Anna had seen her, she was now almost completely naked. She was wearing lacey thigh highs, a tiny pair of panties, and lingerie that did nothing but frame her exposed breasts.
"It's so good to see you again! And finally I can fully enjoy your amazing, naked body!"