Ty is caught totally off guard and is in the middle of putting up a hastily thrown together mental wall when he senses Clyde charging at him. He feels the tip of Clyde's dick bumping against his forehead as Clyde smashes his arm clear through the mental barrier he just erected.
What a strange sensation, mused Ty briefly. He could somehow feel that it was just like the tip of the dick he had seen on Clyde in the shower. It was already almost fully erect. And it felt like that dick was coming out of Clyde's forehead and going into his. He didn't like it, but he was liking it a tiny bit more than he could admit right now.
Ty looked at Clyde's arm stuck inexpertly through the wall, wondering if it was over. Was that really all Clyde had? As he was wondering this, veins started to bulge out all over the arm, feeding the big, defined muscles as they pulled on the barrier. Ty's heart started pumping hard, and back in the classroom, he gripped Clyde's arms more tightly, which only made him think more about how big and succulent those biceps are when flexed. Clyde returned the grip.
Ty tried to think of a way out in the panic, and remembered his wishing powers. Just as soon, he realized he shouldn't bring them to the forefront but it was too late--he had just done exactly that. Now Ty didn't know what to do about that mess, either.
Ty's fretting about wasn't helping him fend off Clyde, of course, who had with a great crumbling noise pulled a huge hole open in Ty's wall. He was forced to watch as Clyde stepped through the hole, proudly dusting himself off, his infuriatingly muscular figure taking its first steps into Ty's mind. Clyde steps forward, and Ty feels more than just the tip of Clyde's dick slide into his head. In the classroom, Ty's face was grimacing while Clyde's was concentrated but with a small smile.
Ty tries pushing Clyde back out, by the force of his mind, but it only slows his steps as if he was walking against someone restraining him. He is able to take several more steps and begins to connect with Ty's mind in important ways. The invaded meta-boy can now feel a significant part of Clyde's respectable dick hard and in his brain, and the invader starts to look through Ty's mind.
He immediately finds out about Ty's Power. He wants to see if he can figure out how it's activated, or even how to control it. These thoughts are all opaque to Ty, of course. But it wasn't hard to guess, Clyde assumed, reading this correct line of reasoning out of Ty's thoughts. He surged forward through this foreign mind, becoming more connected and familiar with it by the second. His cock sank in deliciously and his representation in Ty's mind became more muscular, gaining perhaps 30 pounds of muscle. His quads swelled into hard, powerful teardrops and his already cut butt took on some striations.
Ty's ears are filled with the loud, indescribable yet unforgettable sound of someone entering his brain. Ty tries fighting by squeezing on Clyde, pushing all parts of him in, but this time barely even slows him down. Clyde is really enjoying this, though. "It's so tough to fight me, huh?" he says out loud in real life. Distantly, Ty can hear the class laughing. "It's like you just need more power."
At last, Ty feels Clyde's balls on his forehead when Clyde blasts away Ty's squeezing with a surge of energy. The large boy straightened himself and walks normally again, only to trip over the recent memory of Dustin and the wish. "That's all you have to do?" said Clyde in front of the class. Then, adjusting himself, Clyde whispers, "Just a wish? Then wish for me, Ty! Wish to give your power to me!"
Clyde's mental image speeds all the way back to Ty's, embracing him in his breathtaking muscles. The boy is much larger than Ty, cradling the tired little blond in his beefy, kissable arms, looking into Ty's eyes and going for a hot kiss. Ty looks up at him, with relief and innocence in his eyes, and for a brief moment, Ty starts preparing a wish.