Melissa looked at me. "Actually... I've always wondered what it would be like to be a boy. Now that I've got a dick, I might as well go all the way. Can you make me one?"
An evil idea struck me. "I don't like that grin on your face," Melissa smirked. "Oh, you will," I said, and made my wish.
The effects started immediately. A shock seemed to run through Melissa's body. She flushed through her white makeup and grabbed her crotch. "Unh..." She rubbed her tiny cock involuntarily - slowly at first, then more vigorously as lusty heat spread throughout her.
Melissa's legs were shaking with pleasure, and she fell backwards onto the sofa, still rubbing her dick. Her other hand reached up and grabbed her boob, fondling her now clearly protruding nipple. She moaned as her breasts receded into her chest, going from a C-cup to As to nothing. Her shirt adjusted to match and became skin-tight, keeping her nipples hard and bulging.
Melissa's skin started to change. The faint acne scars and pimples on her face smoothed out, and her makeup became fine and sharp as if it were applied by a professional. The fuzzy hair on her arms and legs retracted inwards before disappearing entirely. Meanwhile, the hair on her head became shinier and more lush - it shrank back into her scalp to a boyish cut that made her look adorably feminine.
Even through the pleasure, Melissa took notice of her changes. "Ahh... what did you wish for, Joey? I don't think - unhh! I don't think I look much like a boy..."
I said, "Just you wait."
The final set of changes started, leaving poor Melissa reeling with lust. Her frame began to shrink. While previously she had been about my height, her head now reached the top of my shoulders. Her arms and legs, faintly toned from years of painting, became smooth and supple like a supermodel's. However, with the loss of her stature came gains in certain other areas. She gasped as her butt pumped up slightly, filling with fat and muscle to become a perfect bubble butt. Her waist shrank and her hips grew. Her body reshaped into a more square shape, and the bones of her face took on a slightly angular form, leaving her obviously male. Her clothes, too, became refitted for her new body, emphasizing her boyish build while still undeniably being girls' clothes.
Her deliciously androgynous figure was almost complete, but I felt like I should help out. I sat on the sofa with Melissa and turned her around so that I was facing her butt. I stripped off my pants and took out my dick, its tip just touching Melissa's butthole.
"Ohhh... Joey, you motherfucker, fuck me already!" Melissa cried out. I decided to take her up on the offer, and pushed myself into her.
As the changes progressed, I could feel Melissa's body shifting around my dick. Her rectum became tighter, yet more flexible, designed to take any size of cock. We groaned together as Melissa rubbed herself and I shoved my rod into her. Her boypussy was complete when I could feel lube beginning to coat my dick, secreted right from her body.
The remnants of Melissa's vagina closed up, and her cock became even hornier than before. Melissa's thoughts were washed away by a flood of need as she pumped her cock, which had grown slightly to about three inches. I was at my limit and let loose a burst of cum into Melissa's perfect hole. She screamed in pleasure as she - now a he - shot out his own small stream of cum.
Melissa breathed heavily. He opened his eyes and took in his new body. He was now a curvy femboy, a completely feminine male. He looked down at his dick, still dripping with cum, and grinned at me as I pulled my dick out of his butthole. "Fuuuck... that was good. Is it like that all the time for you guys?"