Jeff didn't' have to think long before an idea popped into his head: Dan.
Dan was, and always had been, the school bully. It was usually overlooked by the school because he was a star player on the football team, but he managed to torment everyone at the school in some manner or another. Rumor was that one teacher had even retired after dealing with him for a year.
Jeff pulled him up in the computer and started making plans. He swapped her gender first and saw the results, then shaved a good foot off her height to start. He made sure that the new young woman was built and curvy with a sexual appetite to match. Then he made sure she was aware of her changes, along with a number of other mental changes, but the rest of the world thought that Dan had always been Daniel. He set the duration of the change to one hour. He hit execute, then he placed a call.
"Dan, it's Jeff. Don't say anything. You're going to notice some changes in a few minutes. Come over to my house and we can discuss them," and he hung up and waited. He didn't have to wait very long.
There was a pounding at the door just fifteen minutes later. He opened the door and actually had to look down at the former six foot two hulk who was now just a shade over five feet tall now. "Danielle! How are you doing?"
Dan tried to push Jeff backward into the house, but found he didn't have the strength. "What the hell is happening?" he yelled, his voice getting higher even as he spoke.
"I think it's obvious," said Jeff. "You're turning into a girl."
Dan stopped and looked at himself. It was as if that was the first time that he had noticed that. "What? I thought I was just shrinking!"
Jeff guided Dan up the stairs to his room and locked the door. "No, in less than an hour, you're going to be a girl, through and through." Jeff watched in fascination as Dans chest started to expand slowly before his eyes, gaining size slowly and steadily to what soon be a DD chest.
"Did you do this?" Dan asked.
Jeff smiled. "Of course I did!" he said proudly. "I'm going to do to you what you've been doing to me for years, screw you over. And over. And over." He took Dan by the shoulder and smiled, "Now strip naked."
Dan didn't even hesitate, but quickly stripped bare. She was about halfway changed, but externally she was more woman than man. "Oh, you're going to be perfect!"
"What's happening?" she asked groggily. "Why did I do that?"
"The mental changes are taking effect," Jeff said proudly. "You're now my girlfreind, or you will be in a few minutes. You will do anything I ask. Anything." He reached out and played with her hair. "And you're going to hate every second of it, but you won't be able to do anything about it. You're going to be my devoted sex toy as long as I want that." He took a step back. "Now get on all fours and give me a blow job. Now."
Daniel did as she was told. By the time the hour change was up, she had already demonstrated her ability to give a world class hummer.