The next morning Hank had a little trouble finding a shirt that would fit comfortably on him. He ended up choosing a big baggy shirt meant for when he was older. But he noticed that where it used to look ridiculously large on him, hanging to his knees, now it looked normal. Whatever, he thought, and put the jacket on.
Hank went to school with Parker and Alex and he told them about how he seemed different. They agreed but like him figured it was no big deal. Lily met him in the hallway and gave him a hug (they were only in fifth grade after all) and whispered how handsome she thought he was.
Hank sat through class again, seeing the popular boys looking at him again, but with weird looks on their faces this time. Maybe confusion? He also noticed that his pants felt too tight at his crotch and he was getting a sensation he'd never felt before: arousal. Hank didn't realize he'd hit puberty and his changes were about to kick into high gear.
P.E. was that day, which Hank ordinarily didn't look forward to. But he had a lot of energy to burn. So he took off the jacket for freedom of movement and got into it. The activity today was dodgeball, and Hank stunned everyone, himself included, with his ability to dodge and his strength and accuracy in hitting the other team. His team won every time.
Afterward, the P.E. coach took him to his office and asked him to tone it down a little. Then he looked at Hank more closely. He saw that the shirt which had fit Hank this morning seemed tight, and he could see pecs and abs underneath. Hank's biceps strained the sleeves. And was he taller? The coach sent him on his way, but he wondered how that skinny kid was now the most defined 10-year-old he'd ever seen.
Hank continued through his day until lunch, when he went to the bathroom. Pulling down his pants, he gasped as he saw that his dick was now probably 8 inches soft and thick, while his balls were the size of chicken eggs. He did his business and hurried to the mirror. He looked older again, maybe 14 or 15, and he was growing some facial hair! When he spoke, his voice sounded deeper, more manly. When he took off the jacket, the shirt seemed painted onto his buff torso, and he flexed a little bit. Hank couldn't believe it! What was happening to him?
By now Hank was the biggest boy in his class and the others didn't bother trying to hide their envy and amazement. When Lily came to him after school, she liked what she saw, but he got a raging erection at the sight of her and could only think of one thing.