You pulled the hands off of your breasts and turned around to see who dared do that to you! You saw it was Mark, a jerk who always acted the tough guy, and seemed to think that girls like to be treated like pieces of meat. That was about to change. You stared into the orb, and a strange look came over his face. Then a frightened look!
He stuttered, "What is going on? What is happening to me?" You could see he was fighting it, but at last he said, "Um, where did you get that skirt? It looks very comfortable."
You smiled and told him, then added, "Oh, look, some football players in the hallway."
Mark looked in the direction that you indicated, and you could see his eyes open wide as he tried to fight his body, but it was no use. As he looked at the tall football players, his cock grew until he had a huge tent in his pants that couldn't be hidden. And in fact, he wouldn't even be able to try to hide it. Your punishment of him was very elaborate. Mentally, on the inside, he was still a normal, heterosexual male. But that part of him was now just a passenger, almost in someone else's body. His body would no longer have an interest in girls, but be very stimulated by males. He would try to fight it, but it would be useless. He would also be compelled to start dressing like a girl, and behaving in feminine ways. As soon as he could, he would take hormones to take on a female shape, and especially grow breasts, but he would never change gender. Instead, he would become a shemale who loved having men squeeze his breasts, and doing whatever else they wanted, being a totally submissive to 'real' men.
As you walked away, some kids were laughing at the obvious attraction Mark was displaying for the males around him. And that would only grow. The harder he fought it, the worse it would get for him. Only by accepting his new life would he have any control at all.
You sighed in satisfaction as you walked away. Mark wouldn't be grabbing anyone breasts anymore, except his own when he grew them. That he would do a lot!
Now you saw another situation of popular kids harassing a classic nerd.