Ethan lay in bed anxious that night, deeply unsure of how he'd handle tomorrow. It would be the first day at the high school he'd transferred to, and he didn't know anyone his age in town. He might make a total dumbass of himself and have to spend a miserable two years of everyone wanting nothing to do with him, and he found himself rehearsing in his head what he should and shouldn't do to try and fit in as best as he could.
Having lain there awake for a couple of hours, he noticed the stark white light of the moon shining down on him through his window- and Ethan's were-gene was awakened for the first time in his life. A tingling shiver ran through his body, and quietly pulled himself out of bed to stare at the moon. While he stared, two senses pervaded him- he felt deeply entranced by its light, as if it revealed something to him he had never known, and insubstantial, like his body were made of soft clay that would be reshaped.
His skin seemed to ripple slightly, and he could tell whatever this was, he had to see his body. He hastily locked his door, turned on his light and pulled off his pajamas, standing naked in front of his closet mirror.
Ethan consequently had a perfect view of his body's changes. His short blonde hair began to streak down over his shoulders and softened. He blinked in surprise, and in turn his eyelashes lengthened and his eyebrows narrowed- even his brow and nose had narrowed. He felt his lips puff up slightly and the faint fuzz of his facial hair vanish, and his jawline curved. His neck got narrower, and he felt the bulge in his throat recede- he gasped in a softer, womanly tone.
Seeing the feminine face he now had, Ethan had cottoned on to what was happening to him, and weirdly he found himself actually kind of wanting it to continue. He looked down at his hands and arms and saw them tug inwards, getting more lithe and petite. His nails even seemed longer now. The shrinkage rippled down his torso and waist, and he held himself up against the closet when his legs turned more petite and feminine.
Now Ethan had shrunk, his body began reshaping. His shoulders slunk inwards and his hips widened, his ass filling out to fit. It struck him how curvy he looked now, and even moreso when his thin layer of body hair shrank to be nearly invisible. He had never felt so feminine, and it surprised him how nice it felt.
The were-gene set upon Ethan's reproductive system, and the sensations he got from this turned from weirdly pleasant to outright arousing. He found himself fixating on his chest as mammaries started forming inside it- his nipples got hard and grew sensitive while expanding into teats. He touched one and shivered with pleasure, and had to bite his lip to keep from moaning as soft mounds of flesh developed. The teen boy stared in amazement as his breasts grew, until they settled at about a C-cup size.
Ethan peered down to the only male part of him yet to change- his penis, which stood throbbing and erect at the femininity surrounding it. That femininity now closed in to emasculate it. His phallus slowly began to recede into his body, staying just as hard and excitable as it shrank away. His testicles clenched upwards and slid inside his body, and he became castrated, his sperm dissipating as his body altered to produce ova instead. His scrotum tucked inwards and flattened to turn almost flush with his crotch, the seam that ran down his sac preparing to unseal.
While the changes continued- his shaft continuing to dissipate and a vaginal passage forming inside the body as it vanished, his prostate reshaping into a womb which formed a cervical connection to the forming vagina, his scrotum sifting into vaginal lips- something big changed in Ethan's head. His perception of himself became her perception of herself, it went from male to female as her new sex finalized. As the head of his penis finished altering and its foreskin became her clitoral hood, and his scrotum spread open into a vagina, a female name came to her. Effie.
Shyly covering her chest and crotch out of a newfound sense of feminine modesty, Effie felt wondrously confident in her new identity. She pulled her pajamas back on, lay back down in bed and slept soundly.