The 15 year old girl moaned as she was help up by the others. The moan was surprising to them all as the voice was now low and deep as the lump of an adam's apple appeared on her throat.
They slowly laid her onto the ground and watched as she continued to moan, a bulge growing in her crotch area as the hairs on her legs began to thicken.
"What's this?" one of the girls said as she reached down and touched the girls growing, tenting member. "EEEEEK, she has a penis!" She said pulling her hand back.
"Oh my god, her breasts are shrinking!"
"Ewww, she's growing chest hair!"
"Whats happening to you?"
The girl just continued to moan in pleasure as her hand moved to the crotch of her shorts and she began playing with herself even as he breasts shrank to form manly pecs, a few blond hairs sprouting between them.
Her body stretched along the ground as she got taller, her feet extended past the heel of her thong as hairs sprouted from her feet and toes. Her face altered to a more boyish form as her hair shortened back into a shorter style. A sparse growth of facial hair appeared on her chin.
A Wet spot was beginning to form on her shorts as her arms bulged larger with muscles, blond hairs moving across her forearms.
The other girls could only watch in shock as a fully formed male 15 year old lay on the ground playing with himself who was just a girl minutes ago.