At noon, Marcus and his friends were ready for their expedition. They reunited with their partners and began their way to the mountains.
"Carry me on your shoulders!" A girl told her male partner and Marcus soon realized that almost all girls were on the boys shoulders.
"Why do they obey the girls like slaves or something?" Marcus asked the principal.
"It's something natural." He replied. "Girls are fragile creatures and need our protection. They grow their minds and we grow our muscles."
"Hey, Marcus. There's too much sunlight. Keep a parasol above us." The Campbell twins ordered. At first, Marcus tried to ignore them but they quickly got upset. "Don't you hear it, dumbass?!! Now!"
Marcus obeyed and the next few miles he was holding a parasol above those girls. He was really angry and for a moment, he wanted to throw the parasol away. However, it was the wind that blow it away.
"Oh no!" Marcus shouted.
"Go for it, idiot!" The Campbell twins yelled at him.
"I'll go with you." The principal told Marcus. "Guys, we're close to the camping spot. You can arrive there if you walk a little to the north." The boys nodded and kept walking. "Let's go, Marcus."
The next few hours, Marcus and the principal were pursuing the parasol. As they got closer to it, the wind pushed it away again. Obviously, they weren't too smart to think about stopping chasing it and they kept doing it until they separated a lot from the rest of the expedition. Neither Marcus nor the principal were tired, however, the principal asked Marcus to stop when the parasol flied away too far and out of their sight.
"It's gone." The principal said. "And the sun is hiding. We should go back with the other ones." Marcus nodded but unwittingly he released a loud fart at the same time. He felt embarrassed at first but he turn completely red when he felt he was popping uncontrollably. He can't do anything about it like if he was a baby and then he understood why he was wearing a diaper.
"Oh, it looks like you need a change!" The principal grinned a little. "Come, we can do it over there."
"No no! I can do it by myself!" Marcus replied immediately. He was embarrassed that another man saw him naked, especially with his actual body unknown to him.
"A shy boy?!" The principal laughed. "I hadn't seen one in years!" He patted Marcus' back. "You don't have to be ashamed. Men bodies are beautiful!" He laughed again and suddenly and unexpectedly he took off his own giant diaper exposing his huge manhood.
Marcus can't believe what he was seeing. The principal dick was monstrously huge. Long like a girl's arm and thick like familiar soda bottle. His balls matched it perfectly like two cantaloupes in a tight scrotum all covered in a huge amount of hirsute pubes. Marcus felt a sudden need to puke, it was too disturbing to see it.
"Ah! A little of relief!" The principal said as he stroked a little bit his pole. "We used to go around naked all time when the camp was boys only." He kept stroking his dick making it half hard. "Are you still clothed? Let me change you!"
Marcus tried to stop him but the principal managed to pull his diaper off. It fell to the floor full of shit and Marcus was really embarrassed of that. But he got even more embarrassed when he saw his new manhood, or boyhood in this reality. His dick was thick, long and veiny nothing like his former size, his balls weren't as huge as the principal but they were as big as chicken eggs and, to his completely disgust, he was also covered in a huge amount of pubic hair.
"Oh boy! You're a hairy boy!" The principal grinned. "You remind me of myself at your age! Haha!! I remember I used to have a lot of problems with girls because my hairy butt was difficult to clean when I popped!" He looked at Marcus' butt and laughed again. "Hahaha!! It looks like you have the same problem, boy! But don't worry I know how to clean those monkey butt cheeks! Hahaha!"
Marcus felt more and more embarrassed but he followed the principal's instructions and he lay down over a flat stone. At first, he crushed his dick and balls so he needed to open his manly legs a little, his face was red like a tomato but when he felt the toilet paper moving through his ass, a pleasant feeling involved him and he forgot about his embarrassment. A moment later, the principal was done.
"That's it! Clean monkey butt!" The principal grinned. "Oh! It looks like someone enjoyed it a lot! Hahaha!!"
At first, Marcus didn't get why he said that but then he realized he was sporting a huge erection. In the other reality, his boner was like a 3" pencil, here it looks like a 10" soda can. He was embarrassed again.
"Don't worry about it, boy. It's natural!" The principal grinned. "If you were older I could help you but in this case..."
At that moment, all got frozen except for Marcus who can't understand what was going on now. A pink cloud appared in front of him and then he saw Jeanie there.
"Hi Marcus! How are you doing?" Jeanie smiled. "I can see you're enjoying this world I made for you!" She saw his boner and then she saw the principal semi hard dick. "Don't you think he's a little older for you? But don't worry I can fix it!"
"Oh no no no!!!" Marcus yelled at her. "I want go back to my rea-!!" But he didn't finish his sentence when he felt Jeanie's magic moving through his body.
His mature body began to swell everywhere. His already big muscles grew abnormally huge and he grew several feet taller to match it. His hands and feet hulked out along with his tree trunk arms and legs.
"Oh, please!" He begged in a really deep voice as his neck thickened and fused with his huge and broad back. His face turned into a square and all his hair thickened everywhere. The itch on his armpits made him see that he was sporting super thick bushed there. His square jaw was fully hidden behind a thick beard. His chest, arms, legs, even his hands and feet followed and finally, although he can't see it, his monkey butt turned into a gorilla ass. Marcus looked terrified at his new body. He looked like the principal, maybe they were the same age now. He wanted to yell at Jeanie but she has left.
The time unfreeze and the principal kept talking.
"What was I saying?" He said as he saw how Marcus was growing his final part. His already big boner got humongous in a second, his balls followed until they look like beach balls. "Oh I remember. That parasol was a good excuse to have a little time alone, sweetie. I've been waiting too long since camp started to do it."
Marcus didn't like where this was going but before he could do anything, the principal put his lips on Marcus' and kissed him passionately. Along with it, he was stroking Marcus' erection with a hand and rubbing his broad back with the other one.
At first, Marcus was really displeased but he was beginning to enjoy it and he responded doing the same to the principal.
The sun was gone since a while and the night was covering them while Marcus felt the principal's mammoth inside his new body.