Mary woke up. She found herself in a white, completely featureless room. One of the walls of the room was a mirror, in which she could see herself clearly. She was completely naked.
Mary had no recollection of how she got here. However, and perhaps to her own surprise given the situation, she felt completely at ease. The temperature in the room was just perfect, not too hot nor too cold, and she felt as though she had just awoken from the most comfortable sleep of her life.
She stood up and inspected herself in the mirror. She looked like the picture of health. Her shoulder-height hair was perfectly conditioned. Her face was perfectly clean and her eyes were radiant. Her perky breasts hang comfortably from her chest, and her shaved pussy was as cute as she remembered it. Her butt was perfectly toned, and there was not an extra ounce of fat on her body.
As she checked herself out in the reflection, her gaze was drawn to her arm. A small bracelet, barely noticeable at first, was wrapped around her left wrist. It seemed to be made of a semi-translucent plastic material. Mary touched it to feel its texture. As soon as she did, the thing started emitting pink light in the direction of her palm. More than anything else, Mary was curious. The light being emitted had a patterned, and she wanted to figure out what it was.
With some experimentation, Mary realised that if she held her hand out, the bracelet created a hologram in the shape of a button on her palm. The hologram moved around with her hand.
Intrigued, Mary used her middle and ring fingers to touch the hologram. As soon as she did so, the hologram disappeared, and Mary felt a sudden strange feeling in her lower abdomen. Looking down immediately, she realized that a protrusion was growing quickly from just above her pussy. Before she even had the time to process the sensation, a fully formed penis had grown above her pussy.
"Sweet!" she thought to herself as looked at the new appendage. Mary had often fantasized about being a futanari, so this felt like a dream come true. She could feel the cock twitching in the air. As she regarded it, she noted that it was distinctly feminine and well-proportioned. It was longer than other penises which she had seen, yet narrower too.
Finally getting the courage to touch it, Mary touched her cock with her right-hand. It felt amazing. She grabbed the appendage firmly and started stroking it gently. The sensation was out of this world. The cock was about twice as long as the width of her palm, which made each stroke last longer than she would have imagined.
After some time, Mary shifted her attention to the crown of her penis. The bulbous head was deep red, and was throbbing strongly as her blood pumped through it. Mary stimulated the head with her fingers for some time, then went back to stroking her shaft.
Eventually, the rate of her strokes started to increase. As she pumped herself faster and faster, she felt herself drawing towards a climax. Her hand raced up and down her shaft as her mind was lost in a state of bliss. She had never experienced this kind of sexual pleasure before, and threw herself completely into the feeling.
Finally, Mary orgasmed, screaming in delight. She let her penis go as waves of intense gratification wracked through her body and mind. Her penis pulsed as if it were about to burst, a wave after wave of the orgasm washed through it.