Another question popped into Alexis's head: could he make himself a different gender? He had wondered what it would be like to be a girl sometimes, and maybe this power could help him find out. So that he could avoid anyone catching him, he sneaked into the bathroom and locked the stall, and hastily undressed. He pulled off his t-shirt, stepped out of his shoes and removed his socks, dropped his shorts and took his underwear off, standing naked in the locked stall. Taking a deep breath, he wished, "I wish I would turn into a female version of myself."
A similar sensation to the odd feeling which had come over him when he changed in the shower washed over him, but it felt very different to before. For one thing, instead of being concentrated in his crotch it seemed to spread throughout his body, and for another, this couldn't be mistaken for arousal- it felt intense and primal in a whole different way, like a long-forgotten memory. A memory that predated who and what he was.
He saw and felt it as his body responded to the sensation by starting to change. Everything seemed to be reshaping- in most places he slanted inwards, his shoulders and figure narrowed, his hands and feet shrank, his height reduced, his body hair retracted as his skin turned soft and smooth all over. In others he seemed to push outwards, as his hips widened, his butt swelled and his hair lengthened down his back. And in some places the changes felt indescribable, like how his voice was higher-pitched and his jawline had softened.
The sensations then focused in his chest and crotch, and seemed to grow even more intense. He bit his lip as his nipples swelled, rapidly turning more sensitive to the touch, and fantasies swam through his head about having them rubbed and pinched and licked and sucked. Soft mounds were growing under them which felt similarly sensitive and he felt just as desperate to have played with. And between his legs, his shaft that had not long ago swelled to inhuman proportions now shrank to unmasculine proportions. It receded into his crotch rapidly, and as he felt his balls pull up from his scrotum, the indescribable feeling at last felt defined: femininity. He was not a man anymore, she was a woman now. To complete that shift, his scrotum shrank up and peeled open to form her vaginal lips, and his penis reached its new size as her clitoris.
Once she finished transforming, Alexa felt kinda embarrassed to be naked in the boy's bathroom, and hastily dressed, wishing for her clothes to be the right size for her new body. Thankfully they were, and she sneaked out without anyone catching her. She wondered what to try next...