It was a scene as-usual for this kid, the school bully, the popular one, the star athlete. He always fucking hated these check-ups, always making a scene out of it all. It wasn't surprising however, Zebra aren't too bright usually- known for their physical prowess more than anything, which was very evident seeing the boy in his tight fitting briefs. He was only a tween, but he was already packing heat- lean biceps and perfectly formed abs got this kid standing out right away, especially on the football field where his physical dominance could truly be observed.
In comparison, Jamey really was just your average wolf- other than being his assigned general doctor, there was many reasons for him to be here despite the kids attitude. He was, like, totally fucking addicted to being able to get close to all of these athletes, known as a bit of a pervert throughout the football club, all the kids had stories of him getting a bit weird around them, not that he minded the reputation as long as he kept the job. Unlike his patient, the doctor was quite scrawny- not unhealthy by any means, but on the lower side of an average weight range. Our star athlete was here for a routine check-up, continuing to have chest pains through the season.

"Aaron please, I need to measure your blood pressure, here." Jamie says, moving in closer towards the boy and grabbing onto his bicep to attach the monitor. He wasn't the biggest fan of being touched by the 'fag doctor', slapping his hand away. "Hands off me, queer! You're not going to cop a fuckin' feel like last time!" He says, snatching the cuff from his hands, trying his hardest to apply it yet failing miserably, feeling a bit embarrassed. 
"Aaron, you have to let me do this you can't-"
"Shut the fuck up! Let me outa here, I don't need this shit anyways!" The boy yells, getting up from the chair and moving for the door. In turn, the doctor slides his chair towards the door, grabbing onto Aarons arm.
"I cannot let you go, now sit down!" Jamey repeated, the boy pulling a scalpel from nowhere and swinging it at Jamey's hand.
"I said hands off, you fucking homo! Faggot!" He said, stepping towards the doctor brandishing the blade towards him- fixing it in his hand to stab the doctor.

Thinking fast, the doctor slides back from the hyper aggressive boy, picking up a nearby bone mallet from a tray beside his desk. "Aaron, drop the fucking scalpel!" He warned, the zebra blinded by rage and continuing to charge towards him, blade in hand. Without any further hesitation, the doctor swings the mallet in an instant towards the boy's head. Upon contact, a loud "Squick!" confirmed he had made contact, the boys skull collapsing against the blunt force of the hammer, a nice dent forming in his head, his eyes losing focus while his fingers dropped the scalpel to the floor. The boy's bratty and upturned face held firm even with a good bit of his cerebrum crushed to bits. As-if to confirm a critical strike, he began squirting blood from his ear like a fountain, Jamey letting go of the hammer to permit the boys muscled body to crash to the floor.
Sitting back in his chair the doctor watched as the boy collapsed to the ground, spraying piss all over the floor through his boxer briefs. "Holy fuck.." The doctor muttered, getting on his knees to inspect Aarons corpse.. his knotted cock getting hard just from the sight. Even in this moment, he couldn't help but cop a feel of his body- those sleek, toned biceps where to die for- still giving resistance while their host dribbles blood from his nose. "I fucking told you not to fuck with me, you little whore, get these off.." he muttered, grabbing at Aaron's piss-soaked underwear and sliding them down part way to reveal his toned bum, squishing it between his hands and parting his ass, getting a good look at that puffy boi-pucker he was keeping between these buns. "Hoooly shit, I knew it, you're so fucking hot kid~" He continued, leaning over and pressing his eager snout against his sweaty taint, snorting in and catching a whiff of everything he had to offer, moving up to kiss at his butt. 

The kid had some balls, in more ways than one. His fat package dwarfed what many adults had easily- there was no way these massive nards would fit in those tiny jock straps the doc would always peek at the boys wearing in the locker room, no way they weren't bouncing around and slapping against his supple thighs all game long. He couldn't hold back any longer, stripping down his own pants and bringing rock hard cock out, pulling the kids huge flaccid zebra dong out from under his tummy and resting it back so he could get a complete view of his ass, balls and cock. There was no contest, as he had imagined- Jamie's above-average canine dick rock hard against Aarons flaccid monster. Even when dead the kid was impressive down there, the doctor measuring their cocks against each other, frotting the heads together before running up his full length. 
While doing so, Jamie couldn't help but feel a throbbing thump run up his shaft. His cock getting even harder, his hands trailed down Aarons limp arm to feel for his wrist. It was slow, but to the doctor's surprise there was still a pulse! He couldn't believe it, his evil grin widening across his maw watching the boy leak blood from his ears, the stuff trailing down his face originating from his nose and the hammer still lodged in his skull. Picking himself up, the doctor lurches over the boy and grabs him by the shoulder, turning him to lay on his back, his gaping mouth look up at the doctor, his eyes shifting slowly to look at his murderer. Spitting into his open mouth, the doctor laughs at the boy's utter misfortune, gagging and spluttering the spit all over his own face, coughing up blood while his chest spasmed from the mild choking.

From the look on his face, it's obvious the boy wasn't quite the same person that he knew before- a hammer in the skull not exactly doing wonders for his IQ, but it was something. He had full control over this piece of shit, and his reactions to the spit showed that he still was feeling pain, tears flowing down his face a sweet, sweet solace from the years of torment this little fucker must have caused. Vengeful, the doctor savoured this moment some more, leaning down and licking up the tears that were slowly dripping from his eyes. It must have been crushing (boo!) for him, years of bullying defenceless kids and being an ignorant brat came back to bite him in the worst way possible, but some part of him subconsciously knew he deserved this.
Positioning himself just below the brat, letting his tapered doggy dick poke at Aaron's plump balls, gripping the things in a single hand. "Mmh, god damn.." He muttered to himself, pulling his huge balls further and further away from the boy's body, stretching them far out to see just how long the boy's wrinkled sack would allow them to be pulled. Giving them a twist, he gave a good chuckle watching the boy's body spasm from the pain, twirling them around again and again, letting them contract up into a twist with his swollen nuts held hostage at the end. "Godd, you love this don't you bitch? Squirm for me, you sexy bitch!" He yells, slapping the boy's face and punching his twisted-up nuts hard, making him splutter and cough loudly. "Yeaaahh, that's right you whore- spit all over my hand, good boy.." The doctor fishes his hand into the boys mouth, swimming his hand in saliva before bringing it down to his rock hard cock, coating it up to eventually fuck his ass with. 

Bringing his cock to his hole, he watched as each idle slap of the boy's balls would bring on a few seconds of muscle spasms, his asshole clenching and unclenching rapidly wish each hearty nutslap. "Holy shit.. what a fuckin' whore!" He taunted, lining his cock up and pushing it inside, reaching heavy resistance every single inch, squeezing his shaft so roughly. There was nothing quite like this, he never imagined he'd finally take his love of athletic boys to this level, but here he was! Balls deep in some bratty boycunt, feeling that tough zebra pucker milk his cock as-if begging for a helping of his sticky cum. "Who's the fag now, you little whore?" The doctor grinned, leaning in and letting go of Aarons balls, bringing both arms to his legs and pushing them back for better leverage against his asshole- slamming down harder than he slammed that hammer into his fucking skull. "NNghhh, YEAAHHH! DIE, SLUT!" He yelled, his balls clapping against his ass, Aaron's tongue lolling from his mouth, drooling bloody saliva everywhere like a satisfied slut. A few minute pass before Jamie feels himself getting close, the boy was now softly aspirating, eyes in the back of his head from either pain or pleasure.
Grabbing the hammer in his skull, Jamie yanked the thing out and held it over the boy's face- leaning in and kissing him deeply, his mouth unable to really hold a kiss, Jamie just swimming his tongue around in his toy's mouth for satisfaction. Pulling back, his knot finally pops in to his spasming shithole, Jamie squirting his backed-up frustrated load right into Aaron's guts, finally bringing down the hammer in his ecstasy, collapsing the zebra boy's sharp features around the mallet, lifting it again and constantly laying it down- blood squirting every which way, covering his entire body in the blood of his prey.
He didn't stop for several minutes, cackling to himself while he systematically crushed every recognizable feature on the faggot boy's face to a bloody pulp, ruining his perfect irresistible features and crushing his facial structure to smithereens, collapsing onto the boy with his cock still knotted in his ass, snuggling his intact torso, wrapping his legs around him.

He wasn't done yet, but he just wanted to savour the kill- his body still warm as he had only truly died only seconds ago, a single dream fuck from the hottest boy in school. For a moment he just laid there, the cool tiles contrasting against his prey- the mallet deeply imbedded into his skull. "Did you like that, bitch? You were always such a cunt to me, boy.. if only i'd have done this earlier.." He whispers, pulling up and dragging the boy with his knot over to the scalpel he tried to use to kill him with. "What were you going to do with this, huh?" He toyed with the scalpel for a moment, flipping it between his fingers like a pro, before turning it on his meal. "Something like this, right? You wanted to gut me, didn't you?" The doctor asks, beginning a long broad slice down the boy's remaining torso- stopping right above his crotch and finishing with a horizontal cut. Sticking his unprotected hand inside- the doctor pulls out his entrails, unravelling his organs across the tiles like he was pulling the stuffing from a plush toy, finally yanking out his stopped heart- the connections popping off as he takes a hearty bite with his sharp teeth. "Nnggh, this is heaven, boy.. I should do this more often to little punks like you, I hope your mother raised another kid as hot as you because.. *gulp* I don't think I could hold back!" He finishes, leaning down and pulling his ribs apart, tossing them across the room one by one- sticking his muzzle inside and slurping at the warm blood like a smoothie.

Pulling his maw from the warm depths, the doctor pulled the boy behind him for a moment with his knot, snatching up the discarded organs and swallowing most of them whole. He knew he couldn't leave much evidence of Aaron behind- so he imagined he only had a few more minutes to have his fun with the toy before packing him away. Bringing the scalpel to his hung black dick, Jamie sliced perfectly around the edges of the thing- pulling most of his privates clean off of his crotch, a few more cuts to be made and he had a perfect trophy of Aarons' cock, wondering if he should make sausages from the cock and just keep the balls... Either way, he finished by pulling himself free- his knot popping loudly from the tight cocksock he had made for himself, crawling on all fours up to the chest cavity, cocking his leg up like a feral and taking a long, hard piss right into the boy's chest- his bubbly hot piss splashing inside delightfully, drenching the boy in his scent, marking him permanently as property of the doctor, the hot nectar foaming up, mixing with blood to make a nice orange colour, the doctor wiping the rest of his piss against the boy's arm.

Well, that was nice.. but now it was cleanup time! He wasn't quite sure how he was going to get out of this one, but he always seemed to..