But then a tendril found your pussy, and your world exploded. If you'd thought the teasing of your nipples or penetration of your ass had been pleasurable, you'd had no idea. You cried out, and it was indeed an lustfully girly wail as waves of pleasure overcame you. After a few helpless gasps as your tits began to press out prominently, you struggled to regain composure, but you'd lost a big battle, and you had less willpower now, less resistance. You could tell your mind had changed, male pride and will slipping away. The girl inside of you was now almost on equal footing with the boy, and every second she rose higher while the boy was pushed down. The tendril mercilessly plunged deeper and deeper into you, filling you with female pleasure, destroying your manhood. There was no fighting it, no reasoning with it. It had been created for the sole purpose of feminizing you, and knew nothing else. You were helpless before it, and as its energy filled you, flowing from your now soaking wet pussy up to your now sizable tits and then through the rest of your body and finally deep into your soul, you knew you'd lost. You were well on your way to complete girlhood in mind, body, and soul, and there wasn't enough boy left in you to do anything about it. You still offered some feeble resistance, but you barely managed not to surrender to the pleasure completely, and as it mounted you found yourself moaning, gasping and squealing. Yet as you felt yourself totally girlified, tears flowed from your eyes. You sobbed in defeat like the girl you were, even if you didn't want to be. Looking down you saw your tits were now huge, and you realized you might end up with the biggest tits in school. You could feel your ass was just as generous.
You noticed a new boy with horse-like characteristics watching you. At first he seemed to look with pity for you, but slowly it seemed to be turning to fascination, and then lust. Eventually he couldn't stop himself from lifting up his skirt, pulling down his panties, and pleasuring his member. But he was androgynous, as you used to be, and his penis was small.
The principal finally turned his attention back to you, and smirked as he saw the boy. "Ah, some of you lusty boys may be wondering, how do I complete my own transformation? How do I ascend to the throne of true manhood? Well, it's a bit different for you than for the girls. You see, the girls are having their masculinity repressed underneath their growing new femininity, but it's still there deep down inside, and if you want to be a man you will have to take it from them. That's right, all you have to do is start fucking one of these lovely new ladies and all of her former masculinity will flow into you. And in case any of you might be entertaining any misguided notions of chivalry, I do suggest you dispense with them. One way or another I am going to make women out of all of these former boys, whether you help or not, but if you don't become full men you will be slaves the same as they will be, in the new order."
The boy looked shocked, but then he stepped forward towards you. "I'm...I'm sorry. I have too. I can't be a slave." His voice trembled, but his cock throbbed. The tendril pulled out of your pussy to make room for him, but held your legs open. He aimed himself at your entrance. You could tell something was wrong with him, maybe magic affecting his mind.
"Please...please don't!" you begged him helplessly between sobs. When you were a boy, you probably would have raged, cussed at him, spit on him, but as a girl you only looked into his eyes with a plea for mercy. You could hear the boy in you, somewhere far down in your subconscious, trying to fight, but only barely. His voice was tiny.