Every changing session at the girl's locker room was getting less crowded. Jenny knew that her best friend Maria who had had the locker next to her was now a good-looking boy who called himself Mario. But she was determined to hold out as long as she could, and there were only five days left. Piece of cake, right? Except that was what a bunch of other former girls had thought.
How had this jock strap gotten in her locker? She reached out to grab it and throw it away, but once it was in her hands she couldn't just throw it away. How would it feel to wear it? It looked like it would be really comfortable. She knew what it would do, but it just looked so enticing, so comfortable. Without consciously decliding to wear it, she found herself slipping it on, feeling her muscles grow as it fitted over he legs, her new tight, muscular butt. The jockstrap wasn't hanging empty anymore, it was full. Jenny bent down to adjust his balls for comfort. There were no breasts getting in the way.
As he exited the room, he saw Mario, who gave him a hug and a kiss on the lips. "I knew you would make a delicious boy." Jenny felt turned on, but it was very different from being aroused as a girl. "You stuck the jockstrap in my locker, didn't you."
Mario laughed. "I couldn't let you be wasted as a girl when I knew you would be a hot guy!"
Jenny tried to be mad, but he was feeling too good.