This will be so fun! Ty thought. He wished that Dylan would suddenly need to go to the bathroom. Immediately he saw Dylan give a weird look, then jog over to the teacher. The teacher nodded, and Dylan ran for the locker room nearby.
Chuckling, Ty wished himself invisible and teleported to the bathroom. As Dylan stood at the urinal, Ty looked on. Dylan seemed to be about average, maybe a little less below, he was packing a 3 inch soft cock. We can fix that, Ty thought.
First, Ty wished that Dylan would be incredibly thirsty. Then he wished that the water fountain outside was magic, and the water that came from it had the power to grow a boy's cock and balls! The more water a boy drank, the more his dick grew!
Now thirsty, Dylan walked over to the fountain and took a sip to see if the water was cool. He felt a strangle tingle, then suddenly his underwear felt just a little tighter. He looked down, but couldn't see anything different. Ty however had also wished to be able to see through clothes and had seen that Dylan's cock had swelled up just a bit, not enough to be noticeable through clothes though.
Dylan drank again, this time drinking several gulps of the cool water. Standing up, he began to walk back to class when his cock tingled much more strongly. He noticed he was getting hard too, and rolled his eyes “Oh god come on”. It was starting to feel really tight. He had had countless erections before but none like this! Looking around, he quickly ran back into the locker room, even if his cock wasn't that obvious it was still visible when erect. Seeing that no one was in the bathroom, he looked down and saw that his shorts had a huge bulge in them! Dylan gaped, he knew his cock was definitely not that big. Tentatively he slipped off his gym shorts to look closer.
Dylan's underwear was stretched to its limit trying to contain Dylan's 9 inch soft cock, which had tripled in length from the water, but now the locker room magic came into effect. Dylan groaned as his underwear ripped off and his cock grew even longer. After it finished, Dylan's 19 inch soft cock hung to his knees, along with his large apple-sized balls.
Dumbfounded, Dylan gaped at his enormous cock and balls. Looking around for people, he carefully scooped up his cock and stuffed it into the front of his gym shorts. It made quite a large bubble in the front, but at least everything was concealed. Dylan carefully waddled out, while Ty tried hard not to laugh.