Mr Mendes grinned at the two young men making love on his desk. He now had four naked 18 years old guys in his class and obviously the other students, 10 years old boys, were feeling awkward about it.
"As you can see, puberty implies a lot of changes on your bodies in order to prepare you for a sex life." Mr Mendes walked between Carlos and Billy who were ashamed hiding their boners. "These four lads are capable of conceive a baby of their own right now, that's why they produce semen, that white substance they release through their penises. Any questions?"
The boys in the class were so freaked out to say anything. A few of them were closing their eyes while others were looking somewhere else instead. Mr Mendes knew he had to get his attention again and he thought that the only way was integrating all of his students one by one to his practical education until all of them experienced the growing up process by themselves.
"Ok, let's continue." Mr Mendes said as he picked his book. "As you can see, all of your classmates were affected by puberty on the same level. However, in real life, it worked at different rates. Some of you will experience this soon and others will have to wait a little.." Mr Mendes stopped talking when he saw that a boy had raised his hand. "Liam, do you want to participate?"
Liam was an american korean boy, the smallest boy in the class and usually the most quiet, as he was usually reading or drawing alone. Mr Mendes thought that he wanted to join his other classmates and before the boy spoke he muttered the growing spell on him.
"Excuse me, Mr Mendes. M-May I go to the bathroom, please?" Liam said without knowing that he was going to grow up right now.
"Bathroom?" Mr Mendes said bewildered. "I thought you want to grow like Carlos or Billy..."
"N-no." Liam sheepishly replied. "I-I need to use the... tOilEt." Liam's voice cracked at the last word and he quickly assumed that Mr Mendes had made him grow. "Oh, plEase! Don't mAke mE grOw! I need to gO to thE bathrOOm!"
"Well, you may go but hurry." Mr Mendes said. "I don't want an accident from a grown-up young man."
Liam felt that he was changing inside so he hurried to the bathroom. As he walked, his body changes were making him to fart continuously. He didn't use to do that as he was very polite.
When he felt that maybe he couldn't arrive to the bathroom at time, he began to run. However, a hall monitor from sixth grade, Patrick, stopped him.
"Don't run in the halls!" Patrick told Liam as he put his hands in front of Liam's chest.
"I'm sOrry, but you don't understand I really need to go the bathroom." Liam cracking voice stabilized and now his voice sounded deeper than before. "Oh no!" Liam realized that it was too late, he was going to grow up right now. "Help me!" he shreiked, but was momentarily silenced for sheer embarassment.
Patrick looked stunned how Liam's clothing disappeared in front of him. Liam felt so embarrassed of being seen naked that he tried to run away but he was chased by Patrick until they both were in the bathroom.
"What the-?!" Patrick said, staring at Liam's naked figure in a stall. Liam simply looked at his body in horror. Then it was obvious what was happening next. Liam was aging. His height shot up to about 6 feet, as his feet grew. His shoulders broadened and his face lengthened. Hair began growing all over his body, including his face. Then Liam moaned in pleasure as his cock grew down to about 4 and a 1/2 inches soft in a two seconds. During this moan, his voice dropped about an octave.
"Fuck, dude, you're old!" screamed Patrick. "You look like a college student!... A-are you ok?" Liam felt a rush of pleasure as his body hadn't stopped growing up. His skin color darkened a little, his hair suddenly grew thicker everywhere, especially on his legs. Some stubble grew onto his now manly chin. His face reddened again as he farted once more, this time louder and more stinky than before. He quickly pushed Patrick away and closed the stall, almost immediately he was shitting in the toilet as Patrick could hear from the loud noises that Liam was making.
However, Patrick was so curious of what was seeing that he crouched and looked under the door. The first thing he saw were Liam's feet which had grown so big and smelly that Patrick wanted to puke but he contained himself and kept watching. He looked how Liam's pecs were pushing out and washboard abs grew onto his stomach, his biceps stretched out too. Liam didn't look like he grew like a pathetic nerd but a full jock. His legs got bigger, and his calves pushed out. Liam felt a pressure in his rear as his butt pushed out, making a perfect bubble butt and his anus grew wider, as he could note by the bigger amount of shit he was expelling.
Liam looked up embarrassed as he realized what was happening now. His cock suddenly pushed out, lengthening and lengthinging until it hung so low that it touched Liam's shit in the toilet. He had to take it out and Patrick could look how big it was now and it was still widening, becoming intimidatingly huge. Patrick just stared at the hairy man's growing erection in front of him as Liam felt the sudden need to rub his new manhood while he was still shitting.