31 Days Of Derek Hale

31 Days of Derek Hale

Day 14: Whoopie Cushion

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PFFTT!

The fart sound echoed out in the home office as soon as Derek sat down in his chair, his eyes widening and his face turning slightly red as the others in his Zoom meeting cocked their eyebrows at him.

The werewolf huffed as he reached under the cushion of his chair and pulled out a deflated pink whoopie cushion, the pink joke toy making him sneer at his husband and son’s childishness. 

“Yeah, sorry about that,” he said to his coworkers. “My husband thinks he’s funny.”

The rest of the Zoom meeting went without any sort of hiccup, however Derek kept the whole whoopie cushion fiasco in the back of his head, biting back a growl over how foolish it had made him look. The alpha werewolf certainly wasn’t known for his stellar sense of humor, and while he cherished his husband Stiles’s silliness and the way it’d rubbed off on their son, Eli, there were times when Derek grew tired of being the butt of their jokes and pranks.

That led the patriarch of the Hale Household to rally up his family into his van and speed down to the local prank shop, whoopie cushion in hand.

“Der, you don’t need to return the cushion to make a point,” Stiles moped in the passenger seat. “Besides, it’s used. They won’t take it back.”

Derek silently brooded, clenching his jaw in irritation. He hated to look like a stick in the mud, but he felt that someone had to be the serious one in the household, and unfortunately, that responsibility landed on his shoulders.

He pulled up into the store’s empty parking lot, and stormed out of the van. Derek stomped into the store and slammed the deflated whoopie cushion onto the counter in front of the startled old man.

“What kind of adult sells childish toys like these… to other adults?” Derek roared, flinching at the last part of his statement.

The old shop owner simply readjusted his glasses as he stared upwards at the angry werewolf, his lips pursed into a thin line. “It’s just meant for fun,” he tried to explain. “Why don’t you try to loosen up and just have a laugh every now and then?”

Derek bit back a growl at the older man’s worse, feeling oddly defensive. “I am fun,” he snarled, “I just don’t have time for childish shit like whoopie cushions. These aren’t funny, they’re annoying!”

The older man didn’t look phased by Derek’s outburst and actually yawned. “You’re not fun,” he coldly muttered, before a chipper quality crawled into his scratchy voice. “But, I can help you with that.”

Before Derek could ask what the old guy was talking about, he felt an odd electric shock quality run all over his body. It caused the werewolf to tense up, his skin feeling tight for a second before all of his muscles seemingly relaxed.

“What the hell was that?” he asked the older man. 

The man seemed to fight back a smile as he stared at Derek, making the werewolf all the more angry.

Before Derek could take a swing at him or yell some more, he looked downwards in the direction of the man’s gaze, his eyes widening at the pinkish hue to his skin. Derek was normally pale, but now his skin was starting to brighten and look like it was a bubblegum pink, more akin to a pencil erasure than his usual skin tone. Weirder, and even more apt to the erasure comparison, Derek could smell the faint stench of rubber beginning to emanate from him in waves, making him cock his eyebrow.

Carefully, Derek reached over and pinched his arm, pulling back with his hand. The werewolf nearly yelped as his skin now possessed an elastic quality which caused it to stretch outwards beyond the realms of possible. Derek’s heart raced in his chest as he realized that he’d been turned into rubber!

A hiss like a tire being inflated echoed out in the small prank shop, and Derek felt his clothes growing tighter by the second. Looking downward at himself, Derek was shocked to witness all of the muscles in his body steadily inflating. He’d already been blessed with large, manly muscles, yet now they started to bulge out and round. They looked cartoonishly big, with round qualities to the point where he seemed more inflated than muscular, like most of his muscles were full of air. Even his cheeks puffed outwards; and speaking of cheeks, a lot of the growth was centered at Derek’s ass, which bubbled out into large beachball sized globes.

“Wh-what did you do to me?!” Derek roared as he explored his pink, inflated body with his shaking hands.

The older man just continued to fight back laughs. “I figured that this would help you learn how to laugh more,” he snickered.

“What does that even mean?!” Derek cried, taking a tentative step forward, flinching at the sound that echoed out.

Pfffttt!

Derek froze, his eyes widening before they narrowed towards the shop owner. “You turned me into a fuckin’ whoopie cushion!” he accused, holding his arms out to show off his inflated form. However, little poots were heard at the brisk movement, making the werewolf blush.

The older man waved his wrinkled hand dismissively. “It’s only for a few days,” he muttered before gesturing at the whoopie cushion on the counter. “Oh, and no returns on used products.”

With a growl, Derek snatched the whoopie cushion off the counter and stomped out of the store, bristling with every little fart noise that sounded out with each step he took. A few people out on the street would giggle in his direction, especially at the noises that he was helpless to make, making his pink face turn a dark red with embarrassment.

Worse was that once Derek reached the van, Eli and Stiles were stunned silent as they gawked at his whoopie cushion body… then they both burst out laughing.

Derek just bared his werewolf fangs at them in irritation as he opened up the driver’s side door and jumped into the seat—

PPPFFTTTT!

The loud fart noise boomed inside the van as Derek sat down, his inflated bubblebutt squishing like the perfect whoopie cushion it now was.

Immediately Stiles burst out into hysterics, going so far as to wipe tears from his eyes at Derek’s helpless fart noises.

Derek just grumbled to himself and gripped the steering wheel tightly, the motion causing little fart sounds again as he drove home, fart sounds echoing out every time the vehicle hit a bump in the road.

“Damn it, *pfft, this is *pfft ridiculous,” Derek groaned.

31 Days of Derek Hale

Day 17: Nippleslüt

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Alpha Derek Hale was taking a shower, a little irritated that he was rock hard and his husband was working the nightshift. Normally whenever Derek got a little frisky, he was all too happy to rush over to Stiles and go to town. However, he was a little miffed that he was all cocked and loaded, yet he was stuck all by himself with just his hand.

“Damn it,” Derek growled as he pumped away at his throbbing cock, even using some of Stiles’s shampoo to help do the trick.

Still, jerking off just failed in comparison to actually fucking. 

Derek was about to just give up and turn the water to ice cold when he spotted an unknown blue vial in the shower. Picking it up, he eyed it and read out the chicken scratch writing on the label that read out Liquid Lust. 

“‘Liquid Lust’?” Derek scoffed, rolling his eyes at his husband’s antics. Stiles had been practicing potions with Deaton, and every so often, Derek would find remnants of his experiments around the house.

Still, wanting to encourage his lover’s endeavors, Derek opened the vial and sniffed at the concoction. It reeked of musk, making the alpha gag and flinch.

Unfortunately, Derek’s jerky movements caused him to lose grip of the tiny vial in the shower, leading it to falling out of his grasp.

“Fuck!” Derek huffed as the smelly liquid fell out of the bottle and landed all over his hairy chest. It splattered across his pectorals, seemingly absorbing straight into his skin. The musky aroma clinging to Derek like it was emanating from him directly.

Immediately, Derek felt his nipples go hard. The little nips perked up before actually stretching out and elongating, inflating until they were large and nubby, looking like a pair of thumbs attached to his chest.

“What the hell?” Derek gasped as he looked down at his altered nipples. He tentatively reached up with one of his hands to prod at them. “What kind of potion is this— OOoohhhh!”

Merely grazing his fingers against his enlarged nipples sent a ripple of pleasure throughout Derek, his voice breaking out into a moan as his knees buckled. His cock throbbed even more, leaking precum. It was like a surge of pleasure never felt before. No amount of sex or jerking off had ever felt nearly as good as just touching his nipple just had.

“Wha-what the fuck is going on?” Derek panted, his meaty, hairy pecs heaving up and down as he struggled to catch his breath. His nipples seemed to burn with want, their own hardness competing with his cock’s, demanding attention from the alpha.

Almost unable to control himself, Derek reached up with both hands, running his thumbs over his hard nubs.

“Uuugghhh!” he squealed, his head rolling back as he toyed with his chest. The pleasure was mind-numbing, and Derek was helpless to do anything besides rub his nipples.

This soon turned to him grabbing a strong hold of both of them with his hands, lightly tugging on his huge nipples. It felt as if Derek had two cocks on his chest, his ignored dick bobbing uselessly between his meaty thighs as he pinched his big nips.

“Oohh fuuuck,” Derek bellowed out, the normally silent guy unable to stop moaning loudly, his deep voice echoing throughout the bathroom. “Holy shit, that feels so good— UUGHHH!”

Derek nearly shrieked as he came, his cock erupting and spewing out globs of cum that splattered against the linoleum in the shower. Basking in the post-orgasmic bliss, the werewolf felt as if he’d just shot the largest load of his life. He couldn’t help but chuckle in disbelief as he tried to catch his breath.

“Holy shit,” he breathed, rinsing away his cum off the walls. His nipples remained perky and hard, and after masturbating by tugging on them once more, Derek finished his shower and toweled off.

He wiped the steam away from the mirror and frowned when he saw that his nipples were still huge and hard. They poked noticeably off his chest, looking ridiculous on his muscular, alpha male frame.

“Um, maybe this’ll wear off in the morning?” he guessed as he glanced at the vial of the liquid lust, finding no other information about it on the bottle. 

Derek stumbled over to his bedroom, biting down on his lower lip at the shiver that traveled down his spine as the cool air from the A/C blew over his hairy chest, caressing his hard nipples. Just that light sensation was enough to make his cock begin to stir back to life, but he tried to ignore it.

He walked over to his shirt to try to cover his chest, but that proved to be another problem.

“Uuughh!” Derek moaned out again as soon as he tugged his shirt on. His nipples poked against the fabric like crazy, and just the cotton running over the nubs was enough to cause his cock to go erect and shoot out cum.

Derek had to rip the shirt away off of him, panting as he gained a reprieve for his sensitive chest. “What the fuck’s happening to me?” he gasped, his nipples almost simmering in the air as they begged for his attention some more.

That night Derek barely got any sleep at all. He would try to lie down on his back, but whenever the covers brushed up against his hard nipples, he’d go rock hard and have to tug on his nips to ease his horniness. Whenever he tried to lie on his front, it led to the alpha uncontrollably squirming against the mattress, moaning loudly as he ground his chest against the hard mattress, loving how it felt to rub his nipples against it, but also humiliated over what a huge nippleslut he was turning into.

“What the fuck am I supposed to do with these?!” he roared in frustration, looking down at his big nipples. 

When morning came, Derek was slightly relieved to hear the front door opening, meaning that Stiles had come home.

Derek leapt out of the cum-covered bed and raced downstairs to his husband, eager for some answers.

“Hey, Der— what happened to your nipples?” a tired-looking Stiles asked from the entryway once he saw the large nubs attached his husband’s muscled chest.

Derek gestured down at his nubby nipples with a shaky hand. “I accidentally spilt some of that liquid lust potion of yours on them, and now they’re— this! And they’re super sensitive!” he growled, his cock already starting to twitch at the mere thought of playing with his chest again.

Stiles’s eyes widened. “You messed with my potion?” he gasped in shock. “That was just a test. I don’t know if there’s a cure for it.”

Derek paled. “So I’m stuck like this?” he asked, looking down at his hard and sensitive nipples, imagining a life where he’d have to walk around constantly shirtless with his massive nubs on display. They’re so sensitive that he seriously doubted that he’d ever be able to get off again without someone playing with his nipples.

Stiles frowned for a moment before offering a meek smile. “If it helps,” he said, slowly reaching up, “I could play with them, if you’d like?”

He reached up and ran his thumb over one of the nubby nipples, and Derek instantly swooned.

“Ooohhh,” he moaned, his cock going straight to attention. “P-please, play with them some more.” He leaned forward and shoved his chest towards Stiles, looking forward to spending the day having Stiles play with his enlarged nipples, the nubs already tingling with anticipation.

31 Days of Derek Hale

Day 26: Twink

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Derek bumped into some small, tiny guy. The little guy wore comically oversized clothes as he ran off, looking panicked and frightened. 

“Fuckin’ weirdo,” Derek snorted, readjusting his gym bag over his broad shoulder. 

The 6’3” alpha sauntered into the gym to workout. Normally, the muscled stud preferred to lift or perform bodyweight exercises at home where he wouldn’t have to deal with a lot of people. However, after renovating his house, he didn’t want to mess it up with his musk, so he’d opted to get a gym membership. After a few weeks of working out at one of the local gyms, Derek was surprised to discover that he actually liked to work out in public. There was something about being one of the bigger guys at the gyms that filled him with a sense of pride. Towering over the other men and easily out-muscling them only cemented his role as an alpha, and Derek could only smirk as he threw his weight around the gym.

After changing in the locker room, Derek strutted out onto the gym floor clad in only tight gym shorts that strained against his powerful thighs. His impressive chest muscles were on full display as he moved towards the weight pile. His chiseled, plump pecs illustrated sheer masculine power, and Derek frowned a bit when he realized that the gym was virtually empty.

“Guess the other guys just can’t keep up,” he hummed to himself, grabbing the heavier weights on the rack and performing bicep curls like it was second nature to him. His bowling ball-sized mounds flexed with power as he lifted, and Derek couldn’t help but admire his bulky form in the large mirror.

Derek was so caught up in working out that he barely noticed when another gym patron walked up to the weight pile, grabbing a weight that was a little heavier than Derek’s.

This other guy rivaled Derek’s size, both in height and musculature, much to the alpha’s annoyance. This other guy’s thick curly hair reached the same exact 6’3” height as did Derek; that fact bothering Derek for some inane reason. Plus, this other guy also worked out shirtless, showing off his pumped up muscles that exuded manly power. His chiseled pecs were just as rounded as Derek’s, and when he lifted his weight, his bicep bulged to the same exact size Derek’s had.

The other guy glanced towards Derek and nodded at the lighter weight in his grasp. “My girlfriend likes to use the smaller weights too,” he chuckled.

Derek bristled at the obvious attempt to make him look weaker than the unknown douchebag. He just clenched his jaw as he set the weight down, opting for an even larger one than the other guy’s. Gritting his teeth, he began to rack out several bicep curls.

The subtle way the other man’s eyes widened caused the alpha to smirk, loving how his bicep pumped up to an incredible size. The arm burned with lactate and he could vaguely make out the other guy muttering something under his breath, yet Derek was too focused on trying to look like the bigger man.

Derek’s muscles burned from his workout, the burning sensation seemingly spreading throughout the rest of his body from his arm. The immense weight in his hand steadily felt heavier by the second, Derek chalking it up to reaching muscle failure. He thought that it was odd that he’d reached it in under a minute since he could usually lift heavy amounts of weight for a substantiated amount of time.

Derek grunted as he attempted to perform one more rep, yet his arm started to shake and he ultimately dropped the weight, letting it clang loudly onto the floor. 

The guy chuckled again, and clapped Derek on the bare shoulder. “Don’t worry, Little Guy,” he teased, “there’s no shame in starting off with the smaller weights. We all gotta start somewhere, right?”

Derek swallowed down a growl and instead tried to glare threateningly at the other guy to get him to leave him alone… but he stopped when he stared directly at the dude’s chin. Earlier, Derek could’ve sworn that they’d stood eye to eye.

Derek’s eyes widened when he witnessed the other guy actually growing. As impossible as it seemed, the other gym goer sprouted up in height, his muscles also packing on some serious size. His pecs plumped out even more and his arms took on some more consider meat. 

“What the fuck?” Derek muttered, freezing when he heard his voice. It was void of any baritone, making his voice sound lighter and almost squeakier, as if it had shot up a few octaves. 

Then the horror slowly dawned on Derek that the other guy wasn’t just growing, but Derek was also shrinking.

Derek watched as his line of sight kept slipping lower and lower, until he was staring directly at the other man’s plump pecs. It didn’t stop there though, as all of Derek’s muscles began to deflate. 

“What the fuck’s happening to my muscles!?” Derek squeaked out in his smaller voice, holding his arms out in horror as his biceps steadily grew flatter.

Derek was helpless to do anything except watch as all of his hard-earned muscles grew flatter and near nonexistent. His arms shrank until they looked like unremarkable sticks, lacking any bulges whatsoever. His pumped up pectorals gradually flattened as they shrank against his chest, looking smaller and smaller until his entire torso was flat— lacking major pecs or even any abs. Even his legs thinned out as quads and calves deflated, growing smaller until Derek had little twigs to stand on.

To add insult to injury, Derek paled as he squirmed and felt an uncomfortable bagginess in the front of his boxers, the front of his shorts looking flat.

When he was finally done shrinking, Derek stared at his skinny body in shock and horror, estimating that he must’ve lost well over fifty pounds of pure muscle, and that he had to have stood at a measly 5’3” now.

“Wh-what did you do to me?” Derek roared, but his lighter voice didn’t hold any sort of threatening quality to it at all. In his frustration, he tried to charge forward and pummel the now larger man, but as he swung his tiny fists at the man’s massive bulk, the other guy didn’t seem phased.

The big gym bully just snickered. “Sorry, Little Man,” he scoffed, gently shoving Derek away, yet the incredible difference in strength sent the tiny alpha stumbling backwards until he fell on his tiny butt with a thud. “There’s only room here for one gym alpha.” 

To illustrate his point, the larger man lifted his powerful arms and flexed his massive biceps which flexed to the size of small melons, easily out sizing Derek’s tiny stick-like arms.

Out of humiliation, Derek took off, sprinting out of the gym in a frenzy, embarrassed at how there was a lack of dangling sensation between his legs. He hurried into his Camaro and nearly wailed as he had to readjust his seat closer to the wheel because his shortened legs couldn’t reach the pedals.

As the tiny man sped off, a large bodybuilder entered the gym, his large muscles oddly already starting to burn the second the stepped foot inside…

31 Days of Derek Hale

Day 19: Action Figure

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Derek rubbed his temples in irritation as he wandered through the numerous aisles of the toy store. Aisle after aisle, row after row, brightly colored advertisements and countless useless objects with stupidly high price tags made his headache even worse.

Derek had come to the toy store to find a gift for his boyfriend, Stiles… who he had to point out was a legal adult. Stiles was just a total kid at heart and loved to collect tons of franchise memorabilia, which was something that Derek loved about him. And after falling for the whole “Oh, you don’t have to get me anything” trap last year and having to deal with the fallout, Derek was determined to get Stiles the perfect gift this year.

“Damn it,” Derek growled at the memory of Stiles giving him the silent treatment after his non-gift last year, quickening his pace as he stomped through the aisles in search of something great.

Unfortunately, Derek was having no luck.

“Fuckin’ finally,” he repeated under his breath as he entered an aisle chock full of superhero action figures. 

Derek hurried down the aisle, his eyes scanning the rows of plastic men all over. Each one of them was brightly colored in blaring blues and radiant reds, their over exaggerated muscles looking extremely round and out of the realm of anything humanely possible. Derek’s trademark frown deepened as he searched all over the aisles for the perfect one.

No ordinary superhero would do, especially since Stiles already owned so many. Derek shuddered at the thought of accidentally buying his boyfriend one that he already owned, just to get the side eye and accused of not paying attention.

“Damn it,” the werewolf repeated, annoyed. He frantically began to search the aisle, picking up toy after toy and holding it close to his face studiously. Sure, they were all painted colors and had a variety of “[Insert Random Item]-Man” across the box in bright, blocky letters. However, Derek couldn’t seem to remember which ones Stiles already owned.

In his panic, the werewolf grabbed a white box that contained a blank action figure in it: no facial features or costume painted on at all.

The second his fingers grazed the mysterious box, Derek winced at the odd spark that traveled throughout his body, causing the hairs on the back of his neck to stand up. 

“What the hell was that?” he muttered as he brought his hand up to his face to examine his still tingling fingers.

Derek’s eyes widened as he witnessed his fingers taking on a shiny quality. He scrunched up his face in confusion as his fingers gleamed more underneath the bright fluorescents of the toy store. His heart raced in his chest as they stiffened, becoming immovable as his hand apparently turned into plastic.

“Wh-what?!” Derek panicked as the strange transformation traveled down his arms. Weirder was that the werewolf swore that his muscles plumped up, becoming larger and much more exaggerated before they hardened into the same plastic quality as his hands. His signature black leather jacket vacuumed to his torso as his pecs widened and pushed outwards, becoming skintight. It then started to brighten as it went from slate black to royal blue. His jeans underwent the same changes, suctioning to his buffer legs as they brightened into a cartoonish blue that looked more apt on a superhero, not a regular guy wandering around the mall. Derek winced as his bulge seemingly shrank as it was pressed tightly against him. Derek painstakingly move an almost inflexible arm and patted at his groin, groaning as it felt flat and unremarkable like a Ken doll.

The tingling sensation spread up to Derek’s head, and the altered stud couldn’t help but try to reach up with his plastic limbs. His hair had hardened into a large plastic mold, becoming a lump of black plastic in the shape of his usual hair style. His face felt smooth and unblemished, and he couldn’t help but press both of his hands on either side of his head and give it a little squeeze.  Derek couldn’t hold back his gasp as his head squished and then popped back into shape, illustrating that it made completely out of rubber now.

The werewolf tried to run off, to seek help, but he was stopped by his massively hindered movement. Like most action figures, his limbs were stiff and rigid, their over muscled selves only posable at the main joints.

“Well, well,” hummed an irritatingly familiar voice, “that’s a nice look there, Derek.”

Derek struggled to turn around, his virtually immobile body and larger muscles making movement extremely tedious. He fought back a growl when he saw none other than Theo, the bratty chimera who didn’t hide his crush on Stiles.

The mischievous smirk on Theo’s annoying face was enough to clue Derek into the fact that he was somehow behind whatever was happening to him.

“What did you do to me?” Derek demanded, trying to threateningly stalk forward, but his posable joints made his movements awkward.

Theo shrugged his shoulders. “I was lookin’ for a birthday gift for Stiles,” he snorted, “and I know that he likes action figures, and for some reason he also likes you, so…” He gestured forward at Derek’s new plastic body. “And you’re just about done.” 

Theo snapped his fingers.

Derek felt as if his sense of gravity was thrown as he wobbled on his stiff legs. The shelves in the aisle seemed to grow taller and much larger. However, it quickly dawned on Derek that the store wasn’t growing— he was shrinking.

The werewolf was helpless to do anything besides get smaller and smaller, as his movements became harder and harder to create. Derek’s scowl softened and instead he held a stoic expression as his face hardened. Eventually, the former alpha werewolf had been turned into  ten inch tall super hero action figure, complete with big muscles.

“Perfect!” Theo laughed as he easily picked up the toy Derek, snatching the blank box in his free hand.

Derek inwardly screamed, but was helpless as Theo positioned his plastic arms in a manner that looked like he had his hands on his hips in a heroic pose. He was shoved into the box, and from his frozen position, Derek could barely make out the outside of his prison chasing colors to become bright and alluring. Unbeknownst to him, the outside of the box now read: Superwolf: the World’s Most Muscular and Cranky Superhero!

“Stiles is gonna love my gift,” Theo laughed as he walked action figure Derek over to the cashier.

The whole time Derek screamed at being turned into a toy, and he just hoped that Stiles would figure out a way to help him out… and another part of him hoped that Stiles would like his large superhero muscles.

31 Days of Derek Hale

Day 21: Centaur

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“Fuck!” Derek roared as he stormed into the yard, hands clenched into tight fists. 

The werewolf was irritated over having nearly lost control of his inner wolf, and nearly wolfing out in public. Derek and Stiles had been out on a simple dinner date, when stupid Jackson had to show up and be his usual douchey self. Normally, Derek was able to keep his lupine instincts in check; however, the second that stupid Jackson had placed his hand on a clearly annoyed Stiles’s shoulder, Derek had seen red. He’d shot out of his seat and had unleashed a fearsome snarl, even baring his massive werewolf fangs in the jerk’s direction.

It had managed to get Jackson to cut his crap, but the action had also accidentally caught the attention of other patrons in the restaurant, who’d only stared awkwardly/fearfully in Derek’s direction. The ceaseless staring had totally ruined the night, and Derek had dragged Stiles out of there early, much to his chagrin.

“Der!” Stiles called out after the stomping werewolf. “It’s fine, really!”

Derek was still seething. Sure he was irritated with Jackson, yet he was more so angry with himself and how his lack of self-control had ruined his date with Stiles. Thinking about it more only served to bring out an onslaught of more anger-inducing memories about how being a werewolf was a pain in Derek’s ass.

His jaw clenched, Derek just huffed in annoyance. “It’s not fine,” he pouted. “And this whole werewolf bullshit is something that’s just going to keep causing us trouble.”

Stiles frowned and placed a tender hand on his boyfriend’s shoulder.

“Sometimes,” Derek huffed, “I wish I wasn’t a werewolf.”

On cue, a streak of light flickered through the night sky as a shooting star bolted across.

Immediately, Derek flinched as he felt a warm travel throughout his body. The first thing he noticed was that his pants were starting to grow uncomfortably tight. 

“What the hell…?” Derek wondered aloud as he looked down at himself. HIs eyes went wide as saucers when he saw his altered bulge in the front of his pants. 

His normally proportional six inches had somehow elongated, creating what looked like Derek was stuffing a ripe grapefruit in his boxers. It was obscenely large, and between his thick thighs, Derek felt balls that had to be the size of lemons. Worse was that back of his pants felt as if they’s burst at any moment.

Looking over his broad shoulder, Derek gasped at the caricature of a butt that was attached to him. His perky cheeks had somehow managed to balloon out to a crazy size, pushing further out with each second.

In his panic, Derek ripped off his pants, his breath getting caught in his throat at what he saw.

Never being one lost for words, Stiles gasped out, “Holy crap, Der! You’ve got a horse cock!”

Derek’s cock had grown to at least fifteen inches, and it was nearly as thick of his beefy wrist. His balls had swollen up to resemble baseballs. The werewolf didn’t have time to focus on that as he felt his weight being yanked back due to the increasing size of his booty.

His legs stretched out longer, causing Derek to sprout up at least two more feet in height. All he could do was stare in disbelief at his changing body, his heart beat loudly in his muscled chest as he wondered what was happening to him. His throat went dry as he witnessed his toes fusing together, his nails hardening to form hooves. 

His butt grew so big that Derek stumble back and almost fell, but he was caught by something.

Stiles’s wordless gasp mirrored his own as he looked back and saw that he’d grown an extra set of legs to offset his elongated backside. Derek blushed at how he must’ve looked, having his regular-looking torso sitting atop a lower half that was stretched out with four legs needed to keep it upright.

Derek’s altered lower half began to itch as thick, black fur sprouted all over it, covering every inch. It was glossy and looked shiny underneath the moonlight. As a final touch, Derek winced when he felt his distended backside tingle as he sprouted a long tail that swished back and forth.

The warmth finally dissipated, and Derek also felt an odd calm inside of his head, like his inner wolf was finally silenced.

“What the fuck just happened?!” Derek panicked, taking an awkward step forward in his new body, his hooves clacking loudly on the ground as he struggled to get used to walking. As he moved, his huge cock dangled around freely, making his face crimson.

Stiles’s mouth was agape as he looked over his changed boyfriend. Derek’s long legs were thick with muscle, which flexed with animalistic power with every heavy step he took. “Der,” he gasped, “you’re a centaur!”

“A what?” Derek groaned, pinching his nose in irritation. “When I said that I didn’t want to be a werewolf anymore, that didn’t mean that I’d rather be a centaur instead! How the fuck am I supposed to hide this thing!?” He gestured at his horse ass and cock, which were humongous and definitely would prove to be difficult to keep from prying eyes.

Derek stopped and sniffed at the air, still maintaining a keen sense of smell. And a curious aroma was wafting off of Stiles in waves.

“R-really?” Derek asked incredulously.

Stiles bit down on his lower lip and shrugged. “I played a lot of fantasy RPGs, and always liked the centaur characters… like, a lot.”

Derek felt his shock slowly fade, and he couldn’t help but grin coyly at his boyfriend.”C’mere, I’ll give you a ride,” he chuckled.

Stiles eagerly took his hand and hopped up onto Derek’s new back, wrapping his arms around Derek’s human torso. 

Derek marveled at how weightless Stiles felt as he carried him, and he began to trot towards the house… his swaying horse cock getting harder and harder. He just hoped that Stiles knew some special stretching techniques.

31 Days of Derek Hale

Day 11: Pup

Info │ 01 │ 02 │ 03 │ 04 │ 05 │ 06 │ 07 │ 08 │ 09 │ 10 │ 11

Derek wasn’t in control. He couldn’t help it.

The alpha werewolf had no clue what was happening, but the second he heard his husband, Stiles, walk in the front door after getting off from work, he felt a surge of excitement and utter jubilation. Of course Derek loved this husband and was always happy to see him, but this was to a new extreme— almost inhuman.

“I’m home!” Stiles called out.

At the sound of his husband’s voice, Derek’s heart raced and he dropped the TV remote and felt his body crash down to the floor on all fours. Before Derek could wonder what he was doing, he felt his limbs scamper out of the living room and towards the entryway. Inwardly, he panicked, unable to stop crawling on all fours or even stand up. Whenever he’d try to, he’d fall back down onto hands and knees, forced down like a dog.

The second his panicked eyes landed on Stiles, though, Derek’s trepidation vanished.

“Woof! Woof!” Derek cheerfully barked and he sprinted towards his husband. He rushed forward and managed to stand up on his feet— well, more like he leaned his top half against the smaller man, again, akin to how a dog jumps on their master. Unable to contain his joy at seeing the other man, Derek leaned forward and licked his husband’s face all over like a puppy.

“Derek, what are you…” Stiles trailed off, looking confused as the werewolf licked him. His eyebrows scrunched together, and his brain tried to tell him that something was wrong, that Derek was acting different. But as the excited mandog continued to give him kisses, he brushed the feeling away and couldn’t help but laugh.

At this sound, Derek couldn’t help but bellow out another, “Woof!” He blushed when he felt his bubblebutt jiggle a little as he wiggled his hips to and fro, almost as if he’d had a tail. Worse was that no matter how hard he tried to, he couldn’t seem to stop himself.

“Okay, Derek, down,” Stiles laughed as he gently pushed against the eager man.

Derek put all fours back down again at the command, his blush deepening. He had no idea what was happening, but a part of him hoped that Stiles could figure out a way to help him. He opened his mouth to ask for help.

“Hrrmm, woof!” Derek barked, his eyes widening. “Woof! Woof!” His deep voice sounded the same, but no matter how hard he tried, Derek couldn’t put together a sentence. His words were reduced to barks and yips, making him let out a loud whimper.

Stiles hung up his coat and turned back to the crawling Derek. “Aww,” he frowned exaggeratedly, “what is it, Der? You want some pets?”

Inwardly, Derek bristled at the way his husband was talking to him, as if he were his pet. However, his body perked up and he wiggled his hips even more. “Woof!” he excitedly barked, so into it that his hands lifted off the ground with the movement.

Letting out a chuckle, Stiles leaned down and scratched behind Derek’s ear.

The feeling was incredible and Derek leaned further into it, barely noticing the way his leg shook. The sensation of Stiles’s hands on him was intoxicating, and his canine mind craved more.

Derek flopped over onto the floor and rolled over onto his back, his arms hanging out awkwardly in front of himself as he presented his hairy chest to Stiles. Derek looked up at the other man expectantly, despite inwardly screaming at himself to stop.

“Aww, good boy!” Stiles cooed as he gave Derek a belly rub.

Instantly, Derek felt his cock rocket to life, slipping out of his boxers and bobbing out in the air. He couldn’t believe that he was acting like a dog, getting a belly rub from his husband. But he couldn’t deny that he loved it. Something about the way Stiles’s hands ran over his body was purely orgasmic, and the werewolf craved more. Every hairy crevice of his muscled chest was felt up by Stiles, and when his fingers ran over his hard nipples, Derek was pushed over the edge.

“Arroooo!” he howled as he came, his cum shooting up into the air and landing all over his pecs. He panted as he tried to catch his breath, feeling as if he’d just blown the largest load of his life.

Stiles stood up. “Let me change and then we’ll go for walkies,” he said as he walked up the stairs.

Alone, Derek’s mind finally cleared enough for him to start to freak out over what was happening to him. Gritting his teeth, he tried with all of his strength to stand up or speak, but it was futile. Finally giving up on that, he crawled around the downstairs, shocked to see that the house had changed. There was now a dog bowl in the kitchen with DEREK printed on it in large, blocky letters. Unable to help himself, Derek crawled over to the water bowl next to it and lapped up some water noisily, splashing liquid all over the hardwood floor in the process. He leaned up, his face cherry red at his actions, but his thirst satisfied at least. 

Scampering into the living room, Derek winced at the large dog bed in the corner along with the rubber toy in the shape of a bone.

The mere second Derek’s eyes landed on the toy, his heart began to race and he couldn’t help but rush over and happily take the toy in his mouth. Whenever he tightened his jaw on it, it let out a loud squeak, further exciting the werewolf even more. He happily thrashed his head around, loving the squeaking from his chew toy.

“Ready?” Stiles asked, interrupting his play time as he walked down the stairs in more comfortable clothes.

Derek cocked his head to the side and dropped the toy from his mouth, humiliated beyond belief. He was used to be a boasting and powerful alpha, not some damn puppy! Still, as Stiles grabbed the leash off the rack, Derek scampered forward eagerly.

“Sit,” Stiles said as he held out the black, studded collar. There was a small sliver tag on it that read out: Derek, along with Stiles’s phone number.

Derek immediately sat like a dog and straightened his torso as best as he could. He puffed out his chest muscles with pride, loving the way Stiles looked over him. He was such a good guard dog— no, wait, he didn’t mean that.

Stiles put the collar on Derek and attached the leash, barely having time to open up the door before Derek excitedly bolted out. 

The smell of the fresh air and the sounds of the birds chirping was so much, and Derek couldn’t help but whip his head around to take in all the senses. He loved the bright colors of the cars that zoomed by, and he couldn’t help but preen at how Stiles walked in line with him. Derek’s tongue happily lolled out of his mouth as he walked.

The two of them came to an intersection, and without thinking, Derek sat down and looked upwards at Stiles.

Stiles looked left and right before nodding down at Derek, the werewolf standing back up on all fours and continuing their walk.

“Good boy, Derek!” Stiles cooed. “That’s a such a good boy for waiting to cross the street!”

“Woof! Woof!” Derek happily barked, loving how Stiles praised him. He was such a good boy, especially for Stiles.

“Hey there, Stiles!” a voice enthusiastically echoed out.

Stiles looked away from Derek and then smiled lazily at Theo, who walked towards the two men. “Oh, hi Theo,” Stiles said, in a less cheery voice. This one almost sounded distrustful. 

At the sound of Stiles’s change of tone and the approaching of the other man, Derek couldn’t swallow down the fierce protectiveness that bubbled up in his chest. He stomped forward and puffed out his chest as best as he could, steeling his arms to make his muscles look even bigger.

“Grrr!” Derek growled at the other man, making him stop in his place.

Stiles tightened his grip on the leash and kept Derek back, offering Theo a meek smile. “Sorry, Theo,” he huffed, “Derek’s not great with other people yet. I’m still getting him trained.”

Derek stopped growling, but kept his large werewolf fangs bared threateningly at the other man.

Theo held his hands up and shook his head with a chuckle. “Well, I know you’ll get him trained well soon,” he sighed. “You always said that you wanted a dog…” With that he turned around and walked off, but Derek could’ve sworn that he’d heard him mutter “…I must’ve messed up the spell…”

Stiles and Derek finished their walk, the whole time Derek loving the quality time with his husband. Derek had loved smelling all of the flowers in their neighbors’ yards, he'd enjoyed the way Mrs. Hall ad given him a pat on the head (it’d been nothing like Stiles’s head pats though), and he’d chased a squirrel much to Stiles’s annoyance.

When they returned home, Stiles fed Derek some food, which Derek happily gobbled up. He followed Stiles around the house as he did little chores here and there until it was nighttime. 

“Time for bed, Der,” Stiles yawned, stretching his arms over his head and he sauntered towards the bedroom. He hopped in the bed and lied down.

Derek followed him into the room and spun around a few times before lying down on the dog bed that was at the foot of his bed. There was a rawhide there from earlier, and Derek chomped down, gnawing it with his large teeth. He was so happy. He had the best master in the whole world, he got a belly rub earlier, and he got to have walkies.

It couldn’t get any better than this—

“It’s kinda cold,” Stiles shivered. “You want up, Der?” He patted the mattress.

“Woof! Woof!” Derek excitedly barked as he jumped up onto the bed and scurried over to his Stiles, licking his face lovingly. 

“You’re such a good boy,” Stiles laughed as he scratched behind Derek’s ear.

“Woof!” Derek happily barked, his wide and toothy smile dominating his face.