As Jeff tried to decide what to do, he heard footsteps coming down the hall. He turned to see his older sister Sam in the doorway. “Whatcha got there?” She asked him. “It’s a device that can change anything”. “Anything you say? Let me see it” she said as she grabbed the device. He waited as she typed in several things, and gave him a sly grin. “What are you doing?” “Well, I have time to tell you. First, everyone will accept your transformation as having always been normal. And second, I know you’re a teenage boy, so I thought I’d help you out. Your cock will grow to 8 inches long, and you’ll always cum a lot. Second, you’ll lose your limbs. Third, you’ll be stuck into a machine that will be placed in the hallway outside the girls restroom. You’ll be stuck inside with only your head and cock sticking out, and with a ball gag in your mouth. You’ll maintain your relationships, so some people will be more inclined to use you. People will be able to stop you from cumming or force you to become hard with the click of a button.
Jeff sat stunned, but suddenly felt a machine materialize beside him. His cock began growing bigger, and he soon felt the extreme need to cum. As his limb sunk into his torso, his sister looked down at him and said “Oh yeah, I also arranged for you to go through some training, so you won’t be at the school for a few days, but you should like the training”. Jeffs sister tossed aside his clothes, and fit the ball gag in his mouth before he could speak. She picked him up and carefully put him in the machine, squeezing his huge throbbing cock through the opening. As she stood back to admire her work, she said “You’re gonna have plenty of fun. Who knows, maybe I’ll transform myself” and she gave Jeffs dick a playful brush, and giggled as he squirmed with pleasure.