Diego shuddered as he stepped into the bustling hallway, his hole still tender from Mr. Dearborn's rough pounding. Blushing, he stood straight and stiffly forced his legs to move towards his first class. The sparsely populated halls of other infected students eyed him with lust and envy. Diego paid no mind to them, keeping his eyes forward and his still-hard cock pointing the way as his mind still thrummed with pleasure.
---
In his haste to throw on clothes before students began filing in, Diego realized he wouldn't be able to fit his tool the way it was now, still throbbing and begging for another round. Unable to wrap it in the front or stick it down his skin-tight pant legs without creating an obscene outline, he thought of an interesting, albeit perverse solution. He grimaced at the idea; it would be a bit of a risk. And definitely against dress code. With a huff, Diego looked down as best as he could over his swollen pecs. He pulled his pants over his heavy balls and buttoned them over the base of his shaft. His throbbing erection was laid against his cobblestone abs, the head poking the underside valley of his chest. His 3XL shirt was meant for taller people, and while he filled out the top half to the brim with his bulging muscles, the bottom half was left dangling around his thin waist, draped over his bulging thighs. His pecs were so big they created a tent over his hefty endowment. It provided the perfect cover, given that a stray wind didn't blow his shirt around, or that nobody stared too long at the front of his trousers.
---
Diego carefully slid into his desk, breathing a sigh of relief that he made it without any trouble. The school bell echoed in the back of his mind as he thought about what his biology teacher had told him. If Dr. Andrews has been collecting samples from other infected patients, then that would explain his rapid growth spurts and insane proportions. Diego concluded that Mr. Dearborn was likely receiving a similar cocktail of infected cum, as he was showing multiple different symptoms. And if there was a way he could get his hands on that stash of samples... Diego grunted as he felt his dick spurt some pre. His face went white as he felt it against his chest, and more importantly, sticking to his shirt.
Fuck! He was already getting looks from his classmates. He couldn't inspect the wet spot without making a scene, so he quickly excused himself, not waiting for the teacher's permission, and hurried into the bathroom to take care of more important matters. It was not uncommon for the infected students to go on frequent "bathroom breaks" nowadays, not that Diego cared anyway. He waddled into the stall, his shoulders brushing against the frames as tried lifting the shirt to his neck. His triceps dug into the sides of the stall as he shifted around to get more comfortable. Frustrated at the cramped space, he skipped lowering his trousers and started stroking the exposed shaft with both hands. The button on his pants popped and his balls spilled forward, now released and pushing the zipper down to make room. Diego leaned back against the door, the stalls rattling from his sudden jerking movements, and pointed his swollen head at his panting mouth. Thoughts of slurping down all of Dr. Andrews' collected cum and growing as big and tall as him- no, even bigger and taller than him, was all it took to make the young muscle stud unload a second time in the last 10 minutes. He moaned as his hips bucked and his ass kept clenching, bits of his teacher's potent spunk dribbling out into his pants as he tried to catch his own cum in his mouth. His muscles were feeling tight and flexing with each blast from his spraying hose of a cock.
The bathroom door opened, followed by shuffling feet and the sounds of the stalls next to him becoming occupied. Diego went quiet, his heavy breaths slowed as he licked himself clean.
"Dude, this is /so/ weird," the voice from the stall next to him broke the silence.
"Dude, I know," another voice, further down, replied.
"Why would Dearborn need our cum for a science demonstration? Ya think he's some kind of homo?" The unmistakable sound of fapping began to fill the silence between them.
"Dude, I heard from somebody, unh, that he was fucking a student before school today!"
"No shit, ungh. No way he could keep all that in his pants all day."
"Not gonna lie, I'd love to know how it feels to be fuckin with all that meat."
"Dude me too. No homo, though."
Diego stuffed his softening member into his pants, tied his cum-soaked shirt around his waist, and fled the bathroom before he ended up having to deal with round 3.
---
As he dug through the Lost & Found for another shirt, Diego wondered what Mr. Dearborn was planning. Was the cum for his own selfish desires, or was he working with Dr. Andrews? Diego didn't have to wonder too long as lunch time came around. Even though he was starving, Diego was always active in his pursuits, and that didn't stop when he needed answers. He first thought to check the classroom, but finding it empty led him to the teacher's lounge. He shuffled close to the door, attempting to look inconspicuous while simultaneously trying to get a read on the room. His massive teacher was not here either, but he picked up the name as two of the teachers chatted with each other.
"-think Mr. Dearborn and the coach have something going on?"
"I didn't know Coach Kanning was gay. Then again I guess that's not something you'd advertise as a coach."
"Well, gay or not, I saw that beef cake Dearborn head towards the gym after picking up his lunch. He /always/ goes back to his room."
*gasp* "You don't mean-"
"Oh I do. I think-"
Hearing all that he needed to hear, Diego followed the trail like a blood hound. His head was spinning with all kinds of questions and theories. Unfortunately, his search abruptly ended with the locked door to the gym's locker rooms. Beyond that room was his coach's office, and likely Mr. Dearborn. Diego clenched his fist a few times, watching the muscles on his forearm dance across his skin. How much trouble would he be in if he broke in? It wouldn't be that hard, he guessed.
Before he could decide, the door clicked and propped open for him, and shuffling out with one shoulder at a time was his hulking biology teacher, donning the baggy sweatshirt once again. Mr. Dearborn raised his eyebrows in surprise, settling himself between the gym and his favorite student. "Diego," he rumbled. Diego noted the suspicion in his eyes, and then glanced at the lunchbox that the teacher held gingerly with both hands.
"H-hi, Mr. Dearborn," he replied. Diego could swear Mr. Dearborn looked bigger. The sweatshirt didn't fit the same way it did this morning. Now, he could see a more definite outline of his hulking, musclebound teacher. Or maybe it was because he was aware of what was beneath the garb?
"We don't have much time to do it now, but don't worry. I'm sure you'll enjoy today's lesson." Mr. Dearborn chuckled at his own promise and winked at Diego, who could feel the front of his pouch straining again to keep everything contained.
---
As suspected, Mr. Dearborn asked for two volunteers to give sperm samples which he stated he would use for a class experiment in the future. Diego squirmed in his seat, unsure of what to do. It didn't matter, though, as Mr. Dearborn seemed to ignore him and pick two other classmates, one of which was Ryan. Ryan glanced at Diego with confusion, and he returned it with a shrug, his giant deltoids rolling underneath the tight fabric of his new shirt.
After class, the students filed out one by one, except for Diego. Ryan only needed a glance to understand that his friend wouldn't be joining him soon. Diego felt his ass twitch as Mr. Dearborn's hungry gaze bore into him. Without needing to be told, Diego locked the door and waddled back over to the desk, presenting his firm powerful glutes and looking back with desire in his eyes. He slid his trousers down slowly, pressing his palms against his cheeks slowly for his teacher to watch. His throbbing cock sprang up and hit the desk with a wet thump, already slick with pre that was pooling in his underwear all class period.
"Good," the older man purred. "Right to business." Diego heard shuffling behind him, and turned back to find Mr. Dearborn shedding the sweatshirt again. He was definitely bigger. Mr, Dearborn struggled to take it off as his student couldn't help but watch and study his muscles that were just a bit thicker and rounder as they crashed into each other. Mr. Dearborn growled and ripped the shirt apart like it was paper. Diego moaned and shot a wad of pre against the desk. Mr. Dearborn took a single step over and craned his neck down over his pecs to look at his pupil student. "Do you see this, boy? I'm already getting bigger." He brought one up arm into a flex, the forearms and biceps peak pushing into each other.
"Sir," Diego whimpered, "the condom."
Mr. Dearborn smirked and pulled one out of his back pocket. "I won't forget, Diego." He crouched down rolled the rubber over Diego's hard pole, making him wince from nearly cumming right there. Mr. Dearborn shifted to his knees and grabbed Diego's ass in each hand, pulling them apart roughly. "Now let's see if you kept every last drop."
Before Diego could question what his teacher meant, he felt a hot breath against his exposed pucker, sending chills down his spine and making him clench even harder. It was soon followed by a warm, wet sensation as Mr. Dearborn's tongue ran over it again and again. Diego couldn't suppress a low groan as Mr. Dearborn jammed his tongue in, eagerly exploring Diego's hole. From the sound of his teacher's content rumbling, he would have guessed that his teacher's load was still in there. Diego squirmed on the desk and pushed his body against Mr. Dearborn, begging for more. Mr. Dearborn pulled back and smacked Diego's ass. "You like that, boy? You want more?"
"Please, sir," he moaned. He kept trying to push his huge round glutes back but Mr. Dearborn held him firmly.
"I'm going to give you something better." He stood back up, towering over Diego. Diego may still be weigh more, but it won't be for long as Mr. Dearborn was already coming close to his student's level of muscle development, scaled to his much taller height. "Something much better," he purred. Diego felt his teacher's tool sandwich itself between his spread cheeks. Diego's hole opened up eagerly this time, but was still unprepared as it was stretched even wider than this morning. Diego groaned as it slid in without stopping until Mr. Dearborn reached the hilt. He felt so pleasantly full. Before he could get used to the feeling, Mr. Dearborn slid back almost all the way, and rammed it back in, pushing Diego and the desk forward. Diego was already so close to cumming he let out a yelp and filled his condom, his load already matching the size of this morning. The teacher felt Diego's vice grip pulse with each shot and redoubled his efforts into plowing Diego, jamming into his prostate and making his student see stars. Diego kept cumming, the condom, swelling bigger than his fist as he was slammed onto his instructor's fat cock repeatedly. He suddenly felt huge, bulging arms wrap around his midsection as he was hoisted upwards by the older man, unfazed by Diego's sheer mass. Mr. Dearborn held him close as Diego was surrounded by muscles, biting and kissing his wide traps while his hips pistoned long strokes in and out of Diego's suspended body. Diego felt as though the muscle god was hitting him even deeper and he groaned as he felt another orgasm coming. Mr. Dearborn was getting close this time, too, his motions becoming shorter and more erratic. Diego felt like a big masterbation toy as his huge pecs bounced weightlessly with each thrust. Mr. Dearborn gave one final thrust and used Diego's weight to push him balls deep as he filled the short stack bodybuilder with his potent load. Diego could feel his previously chiseled gut pushing out from the sheer volume and exhaled in bliss as his insides were coated with warm cum.
Diego's mind was hazy as he came down from his orgasmic high. He remembered Mr. Dearborn yanking his rubber off and drinking his cum, moaning with his deep rumbling voice. He remembered the bell ringing and his teacher shoving a butt plug into his hole. He didn't remember when the second bell rang or how he got to his next class on time, but if there was one thing he was absolutely sure he remembered was that Mr. Dearborn looked even bigger.