As Marcus held the vial of strange liquid, he couldn’t help but feel a twinge of doubt. Was he really ready to give up his youth now? After everything he did to get the Pubertaway in his hand, Marcus remembered how much he enjoyed being a child again, but the moment he heard a loud thud form the door, most likely the improved Dennis trying to steal his age from him again, he found the resolve to finish what he started, and covered his lithe body with the slimy liquid on the vial.
The liquid felt awful, with the texture of slime and the temperature of ice cold water, but Marcus continued to shower every inch of his prepubescent body with it, he waited for a moment, but nothing seemed to happen. he looked at the mirror with a frown, he still looked like the skinny, nonathletic ten-year-old boy he turned himself into.
Until suddenly Marcus felt a strange burning feeling covering his body, he was beginning to change, Marcus quickly covered his waist with a towel and opened the door, to show Dennis and the others what a real men looked like.
The three boys were still outside, a tired Benji looked with horror when he noticed the slimy substance covering Marcus, he already knew what was going to happen, he just hoped he was wrong.
“You are all too late, you bullied me when I was a child, but its time you all remembered I was the man of the house.” Marcus said, making sure that both Dennis and Oliver got a good look at him when he began to change.
Marcus then screamed, the heat increased inside his body, he felt like he was being stretched from the inside out, while a thousand knives where growing from inside of his skin.
His skin felt tight, too tight, trying to contain his growing mass, he looked down at his hands and saw that they were growing, stretching out to become longer and bulkier, while his dainty feet grew at the same rate, becoming way too big for his body.
Then suddenly his arms began to lengthen, as if they were being stretched out, at the same time his torso grew upwards, he fell to the ground, his tiny legs could not keep up with his growing upper body even with his clownish feet.
His legs were the last part of his body to grow, he finally could stand still, although his interior kept reorganizing itself, making sure the bones and organs were in the right place.
He was skeletal, what little muscle and fat he had as a 10 year old were stretched into the body of an 18 year old, his screamed went from a cute high pitch tone to a deep baritone.
Marcus smiled, flexing his non-existent muscles, “It worked! I am going back to my age!”
Marcus could feel his face changing too, the youthful chubbiness dissapearing, his jawline becoming sharper while his cheekbones become more pronounced, his nose grew longer and thicker, light stubble began to cover his face.
Marcus felt ecstatic, with only his muscles and body hair left to grow, he began to imagine what he will do first, of course he would need to beat that bully Dennis, the skinny boy who ruined his second childhood and tried to stole his age, Marcus could not wait for his muscles to overshadow his, then was Benji, he tried to help him, he would be nicer to him from now on, the opposite of what h would do to his twerp of a brother, Oliver, when he returned to his original body he would be sure to put him on his place.
Before Marcus could continue fantasizing he felt a strange burping sound coming from his stomach, a roll of fat was there, quickly growing in size were his eight pack should be, he grabbed it, noticing with horror at the pale and flabby arms, bat wings forming.
Marcus felt his face once again, pimples were growing on every inch of it, a double chin forming on his neck, he went back to the bathroom, he could barely recognize himself.
A neckbeard was looking back at him, greasy hair already thinning, acne covering his pale skin, a double chin covered in an uneven and scratchy beard, he was massive, filled with more fat that he used to possess muscle, he let the towel fall to the round and lifted his belly, just to see with horror what happened to his former pride, now a small tub that he would be lucky grew to 4 inches, to worsen things he noticed that only a light dusting of body hair was covering his body, compared to the mane he used to have.
“Ha ha ha!” Marcus heard Dennis laugh behind him, he tried to look him in the eye, discovering to his horror that he was still an few inches shorter than the 15 year old jock, which meant that he was still the smallest man in the house.
"What the hell just happened," said Marcus, trying, and failing, to sound intimdating, this only made Marcus laugh harder, Oliver barely containing a smirk.
"What happen is that you are an idiot!" Screamed Benji, "You did not regain your puberty, Marcus drained it, you aged yourself into what you would have become if you grew without doing any excersie, this is what you will become now, if only you had waited for me to fix things."