It had been almost six month since Mike, a fourteen year old Labrador, had been enrolled in the New Boys Academy. It was “a new school for the new age”, as the advertisements put it – an age where boys had no use for attraction to girls. The school would beat that out of them, much to Mike's personal dismay.
He was struggling, permanently pent-up and longing for release. Ideally, he wanted that release to come from a female canine, but uttering such things would result in harsh punishments from the staff. If they even suspected he was fantasising about girls he would be 'corrected' in the harshest possible ways.
The study period was drawing to an end. The quiet reading room was filled by the soft sounds of huffing, panting boys of every species, all stroking their lengths while studying pictures of naked, muscular males. Mike's picture was of a tall, muscular ram, fully engorged and grinning at the camera in a lewd, lustful fashion. The teenager's paw was slick with pre that dribbled from his throbbing cock in copious amounts, slathered across his palm at the apex of every slow stroke. His balls pulsed with the urgent need to release, weighed down by six months of constant denial.
A shadow fell over Mike's desk as the grey wolf, Mr Barron, loomed into his peripheral vision. “Come on, that's no way to stroke yourself!” the teacher mimed the action in the air. “Long strokes, boy! Squeeze your knot tight and glide your paw all the way to the tip.”
Whimpering, Mike replied, “B-but if I do that I don't think I c-can hold it!”
There was little sympathy in the teacher's gaze. “You will just have to learn to hold your cum. Edge yourself properly.”
The Labrador gave a nervous little whine as he closed his paw around the thick, throbbing knot at the base of his cock. He squeezed tight as instructed, and his eyes rolled up at the surge of lustful pleasure the pressure caused him. He had to hold completely still for a few seconds for fear that he would shoot his seed, but there was little sympathy from the wolf. “Come now, no stalling.”
Mike stroked his paw upward, feeling his balls ride up with the urgent need to spunk. He tried to clear his mind of lustful thoughts, thinking of boring chores, or complex problems; anything to keep his mind of how desperately he wanted to finish! He gave his knot another squeeze, this time drawing a thick beat of pre that looked dangerously milky. His sac visibly writhed under the pressure of his long held-back climax, to the apparent delight of Mr Barron.
It was pure relief when the study session finally ended. His cock and balls aching and tender, Mike joined the other teens filing out of the room, managing to fall in beside his friend, Ben. “I really don't think I can take much more of this!” he whimpered.
The red fox slapped him on the back. “You're doing fine! I told you before, the first six months are the hardest. You're almost over the hump, my guy! Stick with it!”
The fox's words offered little in the way of encouragement. Their roomate, Jason, had landed himself in trouble through being unable to control his urges, and the Labrador had no desire to join his goat friend in the ball-busting 'lessons' that slip had resulted in.
For now, there was the promise of an evening meal, and a shower before bed. The long days of training invariably left the pupils sweaty and lustful, filling every room they occupied with strong, musky odours. A cold shower at the end of the day helped drive away those lingering scents, and the worst of Mike's urges, though many of his peers remained aroused and excited as they waited for their turn to bathe. As with everything else in the school, privacy was non-existent; the boys shared a single communal shower space, able to fit a dozen boys at a time. Arriving late, as Mike and his friends did, was frustrating as it robbed them of any free time before lights out.
Once clean and dried, the three friends walked together back to their dorm. It was still early evening, not quite sunset, but the school day started before dawn and so an early night was essential. Returning to their comfortable, familiar dorm, Ben was out and snoring the moment his head hit the pillow. Mike and Jason both cast jealous glances at the fox. The goat boy took longer to settle, whimpering softly and clutching at his reddened sac as he tried to get comfortable. Where Jason's restlessness was due to pain, Mike's distraction was of an altogether different type. It took him over an hour to drift off due to the urgent, lustful throbbing in his groin.

Mike dreamed of a visitor in the night. A Dalmatian girl, big breasted and with wide, plump hips, came rapping on his dorm room window. He watched from his bed as she opened the window and slipped inside, her movements slow and sensual. The girl crept towards Mike's bed, cupping her breasts to show off their size and mouthing the wonderful things she intended to do with them once she reached the Labrador's bed. Mike began to whimper, calling to her. “Oh baby, your breasts are beautiful...”
Yet as the dream girl straddled him, poised to ride his throbbing, hungry cock, the dream world lurched violently. Mike tumbled, eyes snapping open just in time to see the floor rising to greet him. He slammed down hard, barking out in pain, dazed from his violent lurch into waking.
“Dreaming of breasts, Mike?” the question came from Mr Barron. The wolf loomed over Mike, having clearly been responsible for his unexpected plummet.
“N-nosir!” Mike protested.
The grey wolf let out a disgusted huff. “Don't bother lying to me, you were talking in your sleep! Report to my office immediately after breakfast. We'll deal with your wayward thoughts there.”
The wolf stormed away. Confused and bleary, Mike took in the anxious looks of his fox and goat friends. “You're in for it now,” Jason mumbled. The goat's paw closed protectively over his balls as he spoke.
Filled with dread, Mike struggled through his breakfast, forcing it down despite a total loss of appetite. He dragged it out as long as he could, but he could only stall for so long before earning further punishment, and all too soon he found himself knocking on Mr Barron's door. “Enter!” the wolf called from within. Whimpering, the Labrador eased the door open and crept inside.
“Ah, Mike. Come and stand in front of my desk.” The wolf rose from his seat as he spoke, revealing a blue cylinder in his paw. “Do you know what this is, Mike?”
The boy nodded. “It looks like a fleshlight, sir.”
“Indeed it is.” Mr Barron turned the device so Mike could see the opening. The inviting shape of a canine cunny made his balls tingle with lust. “This is what you dream of, isn't it? Come on then, arouse yourself.”
Blushing softly at the instruction, Mike needed only a few strokes of his paw to coax his cock from its sheath. He teased himself as he'd been instructed, with long, lazy strokes and clenches of his knot to bring himself to full hardness. Satisfied, Mr Barron approached, taking his time to lower the fleshlight over Mike's twitching cock. “Paws at your sides,” the wolf commanded as he put the lips of the artificial pussy over Mike's tip.
The boy let out a whimper of anticipation, which turned at once to a sharp rasp of discomfort. Far from the soft embrace he'd expected, the fleshlight's insides were coarse and abrasive, scraping painfully over his cock. He let out an urgent yelp as the wolf drove the cruel device down to his knot, its jagged insides scraping like nails across his reddened, sensitive skin.
“This is what you've been dreaming of, Mike,” the teacher asked with a cruel smirk upon his muzzle. “This is what bedding a girl feels like. Do you like it?”
“N-no!” the teenager gasped, clenching his paws tight as the rough, jagged insides of the tube scraped and scratched up and down his cock. He tried to pull his hips back to escape the painful scouring, but the wolf gripped him by the tail and shoved his hips forward again, slamming the tube down hard. Mike yelped in horror as he felt his knot slip inside the tube's sandpaper embrace. The fake pussy's opening was narrow, but once past the blunt, scraping teeth beyond the rubber lips, he felt his knot swell to fill a cavity beyond.
“You can try and take it off, if you like,” Mr Barron said with a smirk. Mike went to obey, but as he pulled the fleshlight up he felt a ring of sharp spikes dig into his knot. Howling in shock, he released the device, whimpering as it wobbled and bobbed on his cock, scraping and scratching with every little motion.
 Satisfied Mike's cock was imprisoned, Mr Barron returned to his desk draw for his next tool of torture. “It is high time you grew out of your lust for girls. When I'm done with you, thinking of girls will only bring you pain. Cocks are for pleasure, pussies are for pain!”
“Y-yessir!” the Labrador whimpered, deciding it was best to agree in the hope the torment would end sooner. His eyes widened in shock as the wolf unfurled a black rubber pouch, revealing its insides to be covered in sharp triangular points. He wrapped the sharp parachute around the top of Mike's balls, pulling it tight to dig the studs in to the teen's heavy sac. After buttoning the parachute closed, Mr Barron began drawing small lead weights out of his pocket, fastening them to thin chains dangling from the bottom of the parachute. As each one clipped into place, Mike felt the parachute dig into his sac, driving the spikes deeper into his sensitive flesh. His spasms of discomfort caused the cruel fleshlight to bounce on his cock, stabbing and scratching to both draw urgent whines of pain from his maw, and cruelly tease his manhood back to an unwanted hardness. He was so desperate for release that any sensation, even painful ones, served to arouse him.
More and more weights slipped into place, each one accompanied by a sharp tug and a piercing sting. Tears welled in the corners of his eyes as Mike tried to hold still and take his torment as instructed. As the weights grew, not only did they drive the spikes ever deeper into his tortured sac, but their combined weight began to stretch his swollen balls, tugging them down, sending fits of shooting pains through his groin whenever he tried to shift his weight to ease the strain. As the wolf let the final weight go, Mike's squirming caused them to sway, prompting him to let out a bark of agony as his right nut was viscously stabbed, only for his frantic effort to ease the pain to cause the weights to swing about and gouge his left nut just as fiercely. The teen surrendered to shameless howls of despair, his every motion bringing a fresh stab or sting of anguish into his cock and balls.
“I want you to think long and hard about this pain, Mike.” Mr Barron said in a patient tone. “Remember it whenever those thoughts of girls enter your mind.”
Mike nodded frantically, huffing and whining through grit teeth as he fought to cope with the tugging, stretching pain.
The wolf circled around behind the boy, placing a paw upon his shoulder. “How long has it been since you had release, Mike?”
“N-nearly six months, sir!” The Labrador yelped in surprise as the teacher's paw squeezed his right buttock. The jolt made the weights on his balls swing wildly, stabbing the parachute into him at random speeds and angles. The pain made his knees buckle, but Mr Barron caught him before he could fall.
“Go and lean over my desk, Mike. I think I have something that will help you.” The teen took a half step forward and was rewarded with fresh agony as the weights pulled at his sac. It was a short distance to reach the desk, but Mike took it in tiny shuffles, moving as little as possible to minimise the pain to his groin. He cursed the weights, and the scratching, stabbing sleeve around his cock. If only his knot would shrink, the damned thing would fall right off!
Mike felt exhausted by the time he reached the desk, worn down by the anguish between his legs. He lay upon the wooden top, though it offered no reprieve from his torment. A fresh bark of torment slipped from Mike's muzzle as Mr Barron kicked the boy's legs apart, leaving him in a wide, shameful stance. “I think a little 'medicine' will help cure you of your shameful desires,” the Wolf purred. Mike heard the clink of a belt unbuckling, followed by the ruffle of falling clothes. He felt the familiar point of a canine cock upon his anal pucker, but whereas before it had been a training dildo, this was the real thing; warm and soft in ways no rubber pleasure toy was.
Although well stretched and trained from months of self-fucking, Mike still felt a pang of discomfort as the wolf's cock slid inside, for the testicular torture made it hard to relax. A soft, pathetic whimper slipped from his maw as the wolf's manhood slid deeper and deeper, until the hot, pulsing knot was pressed against Mike's stretched sphincter. For all the stabbing and scratching on his cock, and the agonising tug upon his abused sac, the hot meat filling his ass sent a lustful tingling through the teen.
Mr Barron's paw closed on Mike's neck, pinning the boy in place. “I'm going to fuck that filthy 'straightness' right out of you!” With that primal roar, the wolf thrust his hips forward, his knot stretching Mike's hole wide and forcing its way in. The painful stretching was mixed with an urgent, blissful pressure as the wolf's cock pressed on his prostate. Giving Mike no time to adjust, Mr Barron began to thrust, swift and forceful, slamming Mike's hips into the bench. What pleasure the boy might have felt gave way to urgent agony as the rough pounding bent his own cock downward, crushing it and its binding fleshlight into the desk front. The points and ribs within the torturous device bit deep into the Labrador's sensitive manhood, which swelled and pulsed each time the wolf's cock struck his prostate. Each buck of the hips, made the weights swing violently, striking the desk with heavy thuds that heralded a fresh, burrowing stab of misery. “Sir! P-please! N-not so hard!” the teen whimpered, his nails leaving gouges in the desk top as he fought to resist the building agony in his crotch. But the older male had no interest in showing mercy; if anything, Barron's thrusts grew more forceful, spurred on by the begging and whimpering of the youth.
The whirling mix of sensations, the maelstrom of pleasure and pain, it all became too much for Mike to endure. As the wolf's cock buried itself in his ass again and again, the teen gave in to lust. He felt his balls tighten, pulling up against the spiked parachute that held them in a cruel, spiked embrace. His toes curled, and behind him, Mr Barron let out a feral growl of pleasure as the boy's ass clenched tight around his cock. “Don't you dare, boy!” he barked, but Mike was too far gone. With a shameless yelp he let go, spilling thick strands of seed into the cruel artificial pussy that imprisoned his desperate cock, moans of pleasure edged with shuddering gasps of discomfort as every pulse caused fresh scratching and stabbing on his shaft and knot.
“You naughty boy!” Mr Barron snarled. “For that you... will... be... punished!”
With a final thrust, the wolf shot his load into the boy. The sensation drew a submissive gasp from the youth, his sex-starved mind clinging to that messy feeling as a signifier of his own relief. Perhaps as a small act of mercy, the wolf reached down and pulled on the buttoned clasp of the parachute. Mike shrieked at the fierce bite of the points, which gave way to a long sigh as the weights clattered to the floor. His cock, now spent, shrunk enough for the vile sleeve to fall with them. As the pressure on his back eased, Mike stood up and studied himself; his shrinking cock was covered in angry red welts where he'd been poked and scraped, and his balls were little better, swelling from the prolonged torture they'd faced.
Mr Barron, despite his pants being at his ankles and half-hard cock still dribbling spunk, fixed the boy with as stern a scowl as he ever had. “An orgasm without permission is a serious infraction, Mike. For that, you are to receive one week's detention. I'm sure your friend, Jason will show you the way if you don't know it already. Report there after next period. Speaking of which, you had better get moving if you don't want to be punished for tardiness!”

Whatever relief his 'private lesson' had granted was swiftly spoiled by the time his next lesson began. It was an edging class, an all too common subject for the boys of the Academy. Mike settled into a seat next to Jason just before the bell rang. The grey donkey raised an eyebrow at Mike's subtle blush, and then upon sniffing the aroma drifting off his friend, the quizzical expression gave way to shock. “Mike, did you cum?”
“Yeah. I didn't mean to, but I couldn't help it!”
Jason hissed through clenched teeth, but held his thoughts as the teacher, Mr Moor, began to speak. The black bear instructed the boys to stroke themselves hard, then begin to edge the boy beside them. “Begin!” the muscular male called out, and the assembled boys took a hold of their junk. It took Jason no time at all to get hard, but Mike's aching cock was more reluctant; stroking the reddened tip poking from his sheath sent uncomfortable tingles through his body, and as the tip rose out to reveal his shaft, his grasping placed pressure on the tender welts and dimples lining his boyhood. His breathing became harsh and laboured as he tried to force himself hard, but even the softest caress was unwelcome to such tender meat. Despite the overstimulation, Mike managed to get himself half-hard by the time Mr Moor called out again, telling them to reach for their partner.
“Sorry,” Jason mumbled as his paw closed around Mike's cock, the touch drawing a soft whimper from the Labrador. He tried to focus on the task in paw, stroking his donkey friend's length with slow, firm motions. All the while, his own mind was assaulted by a heady, confusing mix of sensations; the pleasure of a paw's mutual stroking mixed with the sting of reawakened stings, and both were heightened by overstimulation to the point that it became hard to distinguish pleasure from discomfort. As Jason began to huff and pant, lustful and needing release, Mike's own grunts were drawn from wishing his tender meat would be let rest, at least for an hour or so!
It came as a relief when Mr Moor called the edging to a halt. The room was heavy with the scent of lusting, pent-up boys; Mike's own paw now smelled strongly of his friend's scent, moistened with copious amounts of pre. Once outside the classroom, Jason turned his focus to Mike's fate. “Did they catch you when you spilled?”
Mike nodded. “I got a week's detention. I guess I'm going there now.”
Jason grimaced. “It'll suck, dude. Good luck.”

Detention was served in a remote corner of the school, in a low, windowless building on the corner of the grounds. Mike knocked on the door when he arrived, fidgeting in dread anticipation of what may follow. “Enter!” a voice called after an unwelcome wait.
The man who summoned him was a tiger. Mike knew him as Mr Lee. Common to so many of the Academy teachers, he was a towering figure, muscular and powerful in stature, who carried himself with a bold, masculine confidence. Though hardly small, and neither flabby nor thin, Mike seemed insignificant compared to the orange, black-striped male that beckoned him forward. “I've been expecting you, Mike. Come stand here.”
'Here' was a circle marked in the middle of the room. Four such circles were set in a line, with some space between them. One was occupied by a Manx cat, a fourteen year old named Devlin. The poor was stood with his paws clasped to his back, but in a bent, pained posture. Sniffles escaped his grimacing mouth, tears leaked from his scrunched eyes. When he eased himself back upright, Mike could clearly see the cause of his pain; the boy's dangling balls were heavily bruised.
“Take the posture,” Mr Lee commanded. “Stand with feet shoulder width apart, paws behind your back!”
Mike did as ordered. A gut-churning surge of fear pulsed through him as Mr Lee took up a long, broad riding crop from his desk. “This will teach you not to ejaculate without permission!”
The teen opened his mouth to protest, but quick as lightning, Mr Lee swung the crop to silence him. It slapped hard into his left nut with a force that sent the boy staggering backward. His head swam, spots flaring before his eyes as he fought the sudden urge to vomit. “Back in place!” Lee snarled. Mike tried to obey, but his legs wouldn't move; the tiger had to grab him and drag him back to position.
“P-please, sir!” Mike whimpered, but his words were ignored. A second swat left him doubled up and coughing, unable to breathe as the fierce, ball-busting swat smashed the air from his lungs. He dry heaved for several seconds, tears welling up in his eyes as he fought back a sob. He hadn't even straightened when a third smack clipped the side of his sac and rattled his balls and brains with equal measure. He slumped to one knee, gulping air and whimpering like a kicked puppy at the white-hot pain that pulsed through his tender sac. When he dared look down he saw wide, fiery red marks flaring across his balls beneath his pale fur.
A brief pause came, albeit at the expense of Devlin. Mike stood up, trying to ignore the hot swelling in his sack, and equally, tried to drown out the howls from the boy beside him. Mr Lee soon returned to torment him, swinging his crop with fierce, bruising blows that slapped his delicate balls with eye-watering force, drawing frantic barks and howls with every swat. Each time it took longer for Mike to recover, and each time the burning in his privates grew in intensity until he could no longer stand fully upright. That still earned him no mercy.
With a final crack that knocked the Labrador to his knees, Me Lee stood back to admire his work. Unable to keep his paws back, Mike sobbed as he cradled his bruised and swollen sac. Deep purple bruises formed across the delicate flesh, radiating surges of agony that left him unable to form a coherent thought. He barely registered the teacher's words, but found small mercy that no further swats were forthcoming. He curled over and sobbed, praying the searing pain would soon fade.
It took several minutes before he had the strength to stand again.
“No more orgasms, understand?” Mr Lee asked when the boy finally lifted himself up from the floor.
“Yessir!” Mike blubbed.
The tiger jerked his thumb towards the door. “Go on then. If you hurry, you'll have time to grab some lunch before the cafeteria closes.”
Mike nodded, scurrying away with his paws closed protectively around his tortured sac. As he pulled the door open, Mr Lee called out again, his words making Mike feel sick to his stomach. “Starting tomorrow, you will be in my class. Afternoon ball busting!”
Mike failed suppressed a whimper of fear. “Yes sir,” he said, and slunk away with his tail between his legs.