"Let's see if I can go further." Billy said before he spoke to his cube again. "I guess I'm 14 now, so... Make me 10 years older."
Almost immediately he started to feel very hot and dizzy." Whooa! It feels different from the last time!" Billy started to feel very weird. He felt his clothes getting tighter and tighter. "Oh shit! I forgot to take my clothes off!!" He tried to unbutton his shirt, but unfortunately he wasn't fast enough cause suddenly his shirt buttons began to pop open.
"Dammit! I really liked this shirt!!" He ripped open his shirt to find that his body had grown thicker with more muscle, he moved his hand down his abs. "Whoa! It's amazing!!" Billy started to feel a sensation throughout his body. His legs started to stretch longer causing his pants to barely cover the tops of his ankles now.
"I’m getting taller?! Awesome!!" Billy began to feel the muscle growing in his legs. He can't stop smiling. He looked down at his arms noticing that his little armpit hair was thickening and spreading. He scratched his chin as his facial hair was thickening as well. His body continue to stretch and expand resembling a high school senior. He felt his pants getting tighter and tighter.
"My pants are too tight to take them off. They're gonna burst out!" His deep voice boomed in the silence of his bedroom. Then, he felt a lot of pain coming from his shoes. "Ahhh!" He looked down and noticed that his growing feet were trying to burst from within his increasingly smaller size 8 shoes. Just then Billy’s toes bursted through the top revealing very big and large toes.
"Whoa! They’re so huge now!" Suddenly the rest of his feet caught up revealing large size 14 feet. Billy rubbed his sore feet from the pain. However the rest of his body wasn’t done growing. The sensation moved right into his arms causing them to blow up with a lot of muscle. "Oooh man! That's what I'd been looking for!!"
Billy flexed his biceps which caused the sleeves of his shirt to completely rip open. His torso expanded to match his now large biceps. "This is incredible! I can't wait to show my new mature self to Katey!"
His excitement was quickly halted by the sensation moving down into his tight underwear. Billy clenched the front of his underwear tightly. "Ugh! I forgot about this too!" Billy grinned while he squeezed his balls as they began to rapidly expand. His eyes rolled back as his dick began to double in size. His thighs began to expand with more muscle causing his pants to rip completely open revealing a throbbing hard-on trying to rip through what was left of his underwear.
Billy couldn’t take it anymore, he ripped open his tight underwear allowing his balls to hang low and his dick to continue growing larger. "Uuuuuuuh!! It's so big!!" Billy moaned in his newly found pleasure as his stroked his thickening cock.
Billy had finally turned into a 24 years old man. His face was no longer that of an innocent boy’s but instead a tough man’s. He stroked his fat shaft harder and harder as he felt this new pressure building up inside of him. "Ugh!! UHH!!" Billy’s face was red as he let a big stream of cum blow all over his body.
"Oooooh!!" Billy almost passed out as he fell on his bed from the intense sexual experience. All that was left of Billy’s younger self was his undersized and torn up clothes that was scattered around the panting man. "I never thought a man could make so much cum!" He looked at the white substance stuck on his left hand as it dripped to his sticky chest hair.