"Jim, how do you feel?" Mr Mendes asked.
"Weird, heavy..." Jim babbled while he recovered his conscious. "W-what happened? W-where am I?"
"Don't you remember? You have joined my class as a volunteer. We're learning about puberty on boys." Mr Mendes said. "Next to you, are other guys who had helped me to demonstrate puberty by offering their youth."
"Puberty? Youth?" Jim said. "That's sounds like a nonsense, mr Mendes."
"Don't you believe me? See it for yourself!" Mr Mendes smiled while he left Jim looking at the other naked guys next to him. They all look familiar although he was sure he had never seen those guys.
Sooner than later, Jim realized that he can't move and when he tried to discover why, he noticed his own body for the first time. Obviously, he screamed in panic and began to breath with difficulty. Gasping and sweating through his new manly pores. He wasn't just older but he was bigger than anyone else in the room, including mr Mendes.
"What's going on?!! Why am I so big and hairy?!!" Jim yelled while he realized how deep his voice had gotten too.
"I told you before, we're learning about puberty." Mr Mendes said. "That means we had seen your body going through it, muscles, height, hair, we had seen everything at detail. Not only you, these other young men went through the same growth as a prove that every boy will go through puberty as they grow up and that it has similar effects but at different rates!"
"But this isn't normal, even for puberty!!" Jim yelled while he tried to move his bowling bowl shoulders. "I'm a freaking giant!"
"In your case, we had a more... interactive experience. These gentlemen chose how to grow you as a resume of the previous transformations." Mr Mendes said. "Interestingly, they made you the most manlier man in the group and technically you all are 18 years old. Isn't it fascinating?"
"And mr. Mendes, what's next?" Troy interrupted. "Once we all are hairy studs, are you going to turn us back to normal?"
"That's what you want?" Mr Mendes asked and all the naked young men nodded. "Hmm... That sounds like a missed opportunity to make you experience the adult world." He thought for a moment before he continued. "I'll think about it later, but before... We haven't finished our class demonstration. We still have two volunteers left, Sanjay, Giovanni... Who's next?"