Undertale: The chronicles of a perverted human

Story by C443 on SoFurry

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My first Patreon commissioned story!

The vicious Undyne finds out what happens when it is not Frisk that comes down into the underground, but a well built and perverse young man with a taste for monstergirls.

M/F, Dubcon(As FUCK), big cock, abuse, monstergirl, and violence.


Undyne The Undying's Undeniable Unvirgining

Hello ladies and gents, this is my first patreon only story and it is set in the Undertale universe and was commissioned by an interesting fellow and Patron named Endgamer.

The main character of the story is a large, heavily built man with questionable morals that fell into the underground instead of Frisk.

We are going into the story as he is crossing the great bridge and about to meet Undyne.

I have taken some liberties with Undertale’s geography and story at the request of the Patron, so before people get angry about it, know that it was by design. Smut before logic!

There is a rather large fight scene and buildup before the smut, but please stick with it. You will not be dissapointed.

Thanks for checking this out and I hope you enjoy yourselves!


Isaac sighed as he walked across the bridge’s span, his eyes roaming across the the void beneath him. He shook his head, trying to shake the raw incredulousness of this strange new world. It was a profoundly interesting place, with all sorts of intriguing creatures. He had to admit that he liked the skeleton brothers, Sans and Papyrus, because they were goofy and just fun to be around. He had found Toriel interesting as well...VERY interesting to be exact when he found out about the things she was willing to do to keep him from leaving. He couldn’t help but grin at the memory of the busty goat lady begging for him to stay, but she was smothering as hell so he bugged out.

He had wandered the Underground as they called it, dodging monsters and sometimes fighting them, finding out that his strength, speed and indeed everything about him had somehow become incredible. He was able to dodge attacks that he couldn’t even see before coming here. He was not sure how, but this place had made him feel superhuman and he couldn’t help but grin at the thought. He liked it here, he liked Snowden, he liked most of the monsters he had met so far and he certainly liked his new abilities.

He had largely avoided most things, just hanging out with Sans and Papyrus when he could and avoiding a lot of the guards who wanted to take his soul or some other crazy bullshit. They had told him that the guy who wanted his soul was named Asgore and he lived on the other side of this bridge...well, if he wanted Isaac’s soul, then he would get a chance to take it in person.

Isaac looked down as he walked, his hands in his coat pockets and looking at the world passing under him in an almost surreal way. He saw a waterfall, a large scrap dump and even an entire town as he walked and yet they seemed to disappear and reappear as he walked.

“This place is a fucking maze!” He exclaimed, his boots thudding against the cold stone of the bridge. “A lot of these paths just circle back on themselves or just come to a dead stop,” He muttered and shook his head, his eyes searching for any discernible path through the winding and physics defying bridge paths. He scratched his chin as he came to a set of divergent paths, running his fingers through his well trimmed beard as he did so.

‘Well...might as well go…’ His thought was interrupted by the sounds of metal on stone, a rapid rhythmic pounding below him that only got louder and louder. He turned and looked over the side at the lower bridge span, curious to see what the hell was making a racket like that...and what he saw set him aback a bit.

There was a tall figure, clad in all-concealing plate armor with a sharklike visage engraved on its helmet. The armor itself looked heavy, with intricate engravings that reminded him of thrown spears and flowing water across the cuirass and pauldrons. Even the sabatons and vambraces were richly decorated and in all honesty quite beautiful if you knew a thing or two about such things. The snarling visage of the helm was topped by a deep red horsehair plume that made no attempt at subtlety, as if the wearer was screaming at his opponents to do their worst in a statement of pure martial confidence.

The figure stopped and looked up at him, the helm craning up as he made eye contact with the strange armored figure and almost instantly Isaac new that things were about to get bad. He couldn’t see its eyes, but the raw malice he felt from the armored figure put him on edge. He had a talent for knowing when he was in someone’s crosshairs and at that moment, he knew that this armored asshole was lining up a shot.

The figure flicked its wrist and a spear made up of blue light appeared in its fist and it stepped forward in a perfect javelin thrower’s stance and HURLED the burning energy blade at the surprised Isaac. He threw himself back, nearly sending himself tumbling over the opposite side of the bridge as the lightspear punched through the stone floor like it was butter and went hurtling into the sky above him, sending shards of broken stone whipping in all directions.

Isaac pushed himself up, preparing to retaliate against the unknown prick who attacked him unprovoked, but before he could do anything, he felt the stone at his feet heat up and the soles of his boots start to smoke. He looked down and a bright blue glow was forming at his feet.

“Oh Sh-” He threw himself to the side as several of the blue energy spears erupted from the stone at his feet, just missing him by a scant few inches as he jumped clear. The smell of scorched stone and ozone filled the air around him as he tumbled, barely staying on the bridge’s span as he rolled up, almost laughing in relief, but already other areas were heating up and that now familiar blue glow causing the air to crackle as if an electrical storm was passing by.

“Oh, give me a break!” He muttered as he took off, sprinting across the stone paths as spears erupted from the ground around him, dodging left and right as the deadly spear-shaped beams of light punched up through the stone around him, leaving smoldering holes in the bridge as he passed. He was furious and slightly panicked as the creature matched his pace, its heavy steel-shod footfalls matching his own at it sprinted underneath him, sending spikes of energy punching up through the bridge in an attempt to murder someone it had never even met before.

Isaac dodged left and right, the smell of vitrifying stone and the blue heat glow his only indicator of the attacks surging his way and he knew he was in deep shit. The psycho in armor had range on him and as long as the fight went on like this through that maze of a bridge system, he was fucked and fucked hard. He needed to change up his game plan, because if this continued and he didn’t find a way through this madman’s vision of a bridge, he would run out of steam and slow down. He knew as soon as he slowed down, he was dead...and he would not allow that to happen.

He sprinted close to the edge of the bridge, his eyes locked on the armored figure as he ran, judging as it moved left and right. It was fast and knew how to move in that armor, but Isaac realised that it had to stop to hurl those freaking spears. An idea was forming in his head and he knew it was going to suck, but if he continued on like this and didn’t find a way out, he was a dead man anyway. The more he ran, the more appealing the idea became and he knew he was going to have to make a choice.

“Fuck it,” He growled and timed it up. He knew this was crazy, but he had no choice. He waited until his enemy stopped to throw another spear...and then he lept. He dove down at the armored figure, hurtling towards the armored assailant with all the speed that gravity and his newly enhanced muscles could muster. The figure stumbled, suddenly in line for a human sized wrecking ball to ruin its day. It tried to throw itself to the side, but it was far too late to do anything but take the hit. Isaac’s frame impacted it, his fist plowing into its chest, driving the air from its lungs and cracking the armor with the force of the impact. Isaac’s attacker tried to keep set its feet, but the momentum took both of them over the edge of the bridge and out into the abyss below them.

“SEE YOU IN HELL, FUCKER!!” Isaac screamed at the armored figure as they both plummeted over the edge...


Undyne jerked awake with a start, followed by a groan of pain as her body protested her sudden movement. She hurt all over and laid back, trying to assess the damage to herself as she tried to work out where she was and what the hell had just happened. She was laying in a twisted pile of scrap metal, crushed under her weight from the fall. Wait...fall?

Undyne shook her head and then gasped in pain. Her long red hair had become caught up in the scrap underneath her and she growled in anger, baring her razor sharp teeth. She had lost her helmet somewhere and the pungent smell of rusting metal filled her nose as she tried to make heads or tails of her surroundings. She experimentally moved her limbs, turning them slowly to check for injuries, but when she found she was mostly uninjured, if a bit banged up and having trouble breathing, she sat up, anger boiling in her veins as she did so. “What the FUCK happened?!” she growled, wrenching herself free and sending a small mountain of scrap tumbling down around her, leaving several strands of her crimson hair locked in the scrap she had come to rest in. She shook her head and stood up, scrap and detritus falling down around her as she took stock of her situation. She was obviously at the dump at the bottom of waterfall, but how did she…

It came back to her. The human, her chasing him across the bridge, that crazy freak leaping off the bridge and knocking the both of them over. She growled and rubbed her breastplate, her chest still sore from the impact and felt the massive dent running across the plate. That human had hit her hard enough to dent the armor and send cracks running across it from her shoulder to her hip. The whole thing was restricting her breathing and she hissed in anger, tugging at the straps of her suit, letting the pauldrons fall first and then stripped off the breastplate and tossed it aside in disgust. Underneath her armor, she wore a simple padded gambeson, which she tossed aside as well, revealing a simple tank top that both covered and accentuated her surprisingly large and full breasts. She tugged the faulds free as well, showing off her wide hips and the generous swell of her butt through the tight, black pants she wore under the suit.

That armor was her pride and joy...and now it was simply dead weight. She couldn’t help but be impressed by the human’s strength, to crack and dent royal guard armor with one punch was a feat on its own, but to do so with enough force to render it unusable was even more impressive. She let a feral grin cross her face, revealing her razor sharp fangs, her good eye shining as she did so. “Now we got a challenge here,” She snarled, anger and eagerness surging through her. This human was a challenge and she was going to show it what it meant to face off against the Captain of the Royal Guard! She would not fail her king and would deliver that human’s soul to him if it was the last thing she did.

She looked around, her good eye scanning the tumbled down detritus of the dump, the smell of rusting metal and wet garbage filling her nose as she looked around, causing her face to scrunch up in disgust. “Of all the places to land...” She muttered before slowly making her way down the scrap pile, her boots crunching through the gathered detritus as she slowly made progress down to the bottom of the pile of refuse. She finally set foot on solid ground and sighed, lamenting the wonderful smells she had discovered on the trip down the mountain of garbage, her eye scanning left and right as she looked for any sign of that human scum that had put her in such a disgusting environment. She knew that the chances of him surviving that fall were slim, but a part of her WANTED him to still be alive. She wanted payback and she was going to get it. He was just like all the rest and he was going to end up the same, fuel for Asgore’s ascension.

She listened intently for any sign of movement as she slowly started to stalk her way through the dump, summoning a spear into her hands. She slinked through the stacks of garbage and rusted scrap, her fin-like ears spread wide as she did so, seeking out any sign of the human’s presence. She moved, her spear held out and at the ready in a two handed grip, ready to strike if that human scum made any attempt to surprise the royal guardswoman. Turns out, she needed no such precautions.

She heard a grunt of irritation and the shift of something heavy moving behind one of the great towers of scrap and she smiled. “Got you, human!” She growled, a low and throaty rumble as she moved around the stack, eye open wide and ready launch herself at the surprised human. When she turned the corner, she raised her weapon, ready to send it hurtling into that human garbage’s chest, but what she saw stopped her dead. He was standing there, looking straight at her...and holding a steel support piling for a building like a club, hefting the ridiculously heavy beam as if it weighed nothing. She stared for a moment, surprised at the human’s strength and the ridiculous nature of him hefting a steel beam the size of a small house.

“Heya, cunt,” He said with a vicious grin, and SWUNG the heavy steel beam like a bat. Undyne had just enough time to get her spear between her and the beam, but the impact sent her flying across the dump, hurtling into one of the great refuse piles and sending it toppling over with the force of the impact. She coughed and pulled herself free, more enraged than hurt. Her spear had dispersed most of the impact, but just the raw humiliation of getting surprised by that human swine made her blood boil. She pushed herself free of the refuse, cursing as she tried to get her bearings, but the human was already on her.

Undyne felt a fist rocket into the left side of her face, striking from her blind side and keeping her off balance. She rolled with the blow, robbing it of its impact and tumbled away through the detritus in order to build some distance and give herself some breathing room. He punched like a runaway boulder and was smart enough to attack from an enemy’s blind side...she was actually impressed. She rolled to her feet, eye flashing as she did so, another spear forming in her grip as the human barreled towards her. She knew she couldn’t match his strength, but she had other tricks beyond mere physical might up her sleeve.

She flicked her wrist and send her spear hurtling towards him, but he threw himself to the side, the spear rocketing past close enough to him to singe his hair. Using the momentary breath that his pause gave her, sent a torrent of freshly conjured spears at the hapless human. He threw himself to the side, rolling and ducking in the dirt and scrap as he avoided the sun hot spears as they punched vitrified holes through the rubbish around them. “You’re strong, human!” Undyne screamed, “But you will not leave her alive!” She sent another blitzing storm of spears at him, causing him to dance away, “I am going to deliver your soul AND your head to Asgore on a silver platter!”

Isaac ducked low as he ran through the rain of spears, the blades sending up puffs of vitrified sand, melted metal, and scorched garbage around him as he hid behind one of the great garbage towers to catch his breath. It was like trying to fight a machine gun, if you ran right at her, she would pepper you with those damn spears. He was certain he could take a few hits from the crazy blue fish bitch, but he couldn’t just tank them all. He sighed and leaned back, enduring her shouted taunts and insults as she approached. He knew that he could win if he could close with her, he already proved that he was more than strong enough to do so, but how could he when she was literally throwing enough of those things that he couldn’t so much as wave his cock in her direction?

He clicked his tongue and thought about her, trying to come up with a strategy on how to fight the psychopathic blue cunt, but then a bulb went off in his head. She was blind in her left eye and indeed he had used that weakness against her before. She had limited depth perception and couldn’t see anything coming in from the left without turning her head. As she approached, he darted out from behind the tower he had been taking cover behind, strafing across her line of vision, making sure to keep her head turning to see him as he moved.

“Stay fucking STILL!” She screamed as she hurled the spears, but he kept moving, darting right and then left, keeping her bad eye towards him at all times. She hissed, clenching her teeth, anger pounding in her veins as she sent wave after wave of blood boiling energy spears towards the burly human, but with each move he got closer and closer. She kept trying to turn, trying to keep him in line of sight, but he had her figured out and figured out good. She lashed out in rage, smashing one of the trash towers in a fit of fury as she tried to strike the slippery human, causing it to shatter into thousand of pieces and scatter detritus everywhere...and that mistake would be her undoing.

In the dust and debris kicked up by her infuriated and misguided attack, he made his move. He came in from the left, hard and fast. He knew if she reacted fast enough he would be skewered, but he couldn’t keep playing this game. So he went in full throttle, betting it all on one attempt.

Undyne heard his footfalls and made to turn, her good eye widening as she made to turn. “FUCK!” She screamed as she tried to turn in time, an energy lance forming in her fist, but she was too late. His fist thundered into her unprotected stomach like a battering ram. It was perfectly placed, hooking up to drive the air from her lungs in one brutal blow. Undyne’s breath exploded from her lungs in one massive burst and she doubled over onto his arm, clutching at her stomach as she collapsed to the ground, gasping for air that would not come. Isaac sighed and stood up straight, hopping in place as the adrenaline hammered in his veins. There was nothing like the rush of winning a life or death struggle...well there was one thing.

He looked down at the doubled over Undyne, admiring the pronounced nature of her bubble butt and the delicious curves that the crazy fish lady’s body took. He found another feeling rising in him, one that he had not satisfied since leaving the ruins. “To the victor...go the spoils,” He said with a grin and grabbed the back of Undyne’s head, forcing it into the dirt beneath them, causing her tight butt to strain her pants even more, becoming even more pronounced and full.

“What...the fuck are...you doing?!” She gasped as he forced her face down hard into the dirt and filth. She tried to push back, but his far greater strength kept her in that humiliating position, her ass pushed up and her face pressed into the ground. “I will fucking KILL you,” She snarled, her eye flashing as she struggled, trying to push up against him, but his hand on her head hept her pinned easily, despite her best attempts.

“I am gonna take my winnings, you fish faced BITCH,” He said with a grin before he grabbed the hem of her pants and RIPPED them away, revealing that she wore nothing underneath those tight black pants. Her azure colored ass was glorious, full and round, with a gentle heart shape and the smooth cleft of her cunt was tight looking and seemingly untouched by anything other than her own explorations. Isaac grinned and licked his lips before delivering a stinging slap to her right asscheek, causing it to bounce deliciously to the perverse human’s delight. He then sunk his fingers into the meat of her bountiful butt, savoring the feel of her cool and soft flesh in his palm. “Damn, you got a nice ass, you fish faced cunt,” He snickered, kneading her blue bubble buns as the helpless Undyne growled and spat underneath him. “Your face could use some work, but everything below the neck is quite nice,” He said with a laugh as he slid his hand down to cup her smooth blue cunt, working his fingers across her flesh and toying with her soft cuntlips.

Undyne snarled and kicked, trying to escape his grip, her eye flaring as she wriggled in his grip, but something was starting to grow in the pit of her stomach, something entirely unwelcome and indeed terrifying to the proud warrior woman...arousal. She felt it building at her core, a tingling pressure that slowly grew as he toyed with her silky smooth labia, working his fingers expertly across her pussylips. She wanted to deny it, but her body responded to his eager pawing at her long ignored womanhood.

“Oh, look at this! The fish bitch is getting into it!” He said mockingly as he ran his fingers across her now swollen and puffy cuntlips, her juices starting to flow freely and her clit engorged and unhooded, the little love nub as hard as a rock. “I would make a joke about fish smell, but that would be WAY too easy.” He said with a smirk and gave her clit a pinch, twisting it between his thumb and forefinger as he toyed with her, causing her to let out an unconscious groan of pleasure. “That's right...just like I thought, big and bad with your armor on, but when you get a proper man’s hands on you, you just devolve into a moaning mess.”

“Gonna...kill...you!” Undyne snarled, trying to pull away, but her struggles grew weaker and weaker as her body grew hotter and hotter. She should not be enjoying this, she should not be so turned on by this human assaulting her like this, but every stroke of his hand brought a new tingle up her spine and a new surge of desire into her sex deprived body. She had never had a male partner, focusing her entire life on training, even losing her hymen to a particularly straining training session. She was wholly unprepared for his attentions and skilled hands and she couldn’t help but let out another long groan as he gave her clit a pinching twist. That, combined with the raw erotic sensation of him pinning her down and toying with her sent fresh waves of humiliating pleasure through her tight body. She shook her head, groaning as he worked her now soaked cunt, her long red hair lashing left and right as she tried to force those unwanted feelings down, but it was hopeless. She let out another long and low moan of pleasure, her fingers digging into the dirt and trash underneath her as she unconsciously pushed back against his probing hand, unconsciously offering herself up to the horny human...who took full advantage of it.

“Alright, you slutty blue bitch...playtime is over, don't fucking move!” She felt the pressure on her head suddenly vanish Her body tensed as part of her wanted to leap up and rip out his throat with her teeth, but his command echoed in her head. Undyne remained still, against every fiber of her being, she stayed there with her face in the dirt, her blue bubble butt prompted up and her slick cunt on display. “That’s right. you fish faced cunt,” He growled and gave her round butt another hard SMACK, drawing an unconscious moan of pleasure from the panting royal guard’s lips. She then heard a long protracted zip and she looked back, lifting her head just enough to see what her abuser was doing and what she saw caused her jaw to DROP.

He had freed his cock and while Undyne had next to no experience with such things, the raw scale of that towering pillar of meat drove home the impression that not only was he above average in that department...he was downright freakish. As long as her forearm and as thick as her wrist, it was an obscene monument to male virility. Long strands of precum already hung from his massive cockhead and it bobbed with his heartbeat, the veins running along its obscene length, pulsing wildly as he stood over her. Underneath that monolith to masculinity, swung two balls that looked more at home on a horse than a man, already pulsing and tight with the need to fill her with hot cum.

Isaac noticed her shock and grinned down at the still panting Undyne. “Yep, this is going into your cunt...and there is not a damn thing you can do about it,” He said with a mocking laugh as he stroked his shaft, even his broad hand not able to close fully around that pulsing prick. Undyne felt raw panic and primal desire surge up through her, fear at the raw size of the cock that was set to absolutely devastate her still untouched cunny and the animalistic lust that pounded in her brain. She didn’t know what to do, to try to run or to spread her cuntlips wide for his abuse. Her indecision caused him to make the decision for her.

He leaned forward, stepping over her prone form and pressing his booted foot against the back of her head, forcing her face back into the dirt as he lined up his throbbing cock with her silken cunt. He didn’t say a word as his pulsing cockhead was pressed tightly against her soaked cuntlips, groaning as the heat of her core sent waves of pleasure through his body. He didn’t hesitate and he thrust forward, sinking his massive cock deep into her tight cunt.

Undyne didn’t have any defiant words to spit, but she didn’t beg for it either...all she did when he sunk that massive shaft into her tight and untouched folds...was to MOAN in pained pleasure as her virginal twat was absolutely devastated by the biggest cock she had ever heard of outside of one of Sans’ dirtier jokes. She felt so full that she thought she would split in half as that log of a cock slammed into her cervix, causing her entire body to jerk forward with the force of his thrust. He pulled back, savoring the feeling of her cunt rippling up and down his cock like a tight glove. “Damn, fish-face...you are tight as hell and just as wet,” He rumbled, his eyes half lidded as he drew back, his cock almost popping free of her velvety folds. “I knew you were gonna be a huge slut, but...damn!” He laughed, his cockhead pulsing as it rested just inside her tight folds. “But it’s time to put you through your paces like a good bitch,” He winked down at her, his booted heel ground her face into the dirt before as he THRUST into her, driving his cock as deep as it could go before pulling back. He FUCKED her, driving his cock and her face into the ground with every near lung emptying cockplunge into her freshly soaked cunt.

She had never felt like this in her entire life, the rage at her defeat and him taking advantage of her slowly melting away to be replaced by a burning heat in her belly, as if every brutal plunge of that cock was burning away that rage and replacing it with an almost mind bending pleasure. Each slam of that battering ram-like cockhead into her cervix sent painful shockwaves of agonizing pleasure through her, causing her to moan and groan with each hard thrust into her tightly constricting cunny and she hated him for it. She hated him for beating her, for humiliating her and most of all...for making her CUM.

She SCREAMED into the dirt, her back trying to arch and her toes curling as a mind blowing orgasm ripped through her like a tsunami crashing onto the shores of her mind. She howled her pleasure into the trash underneath, femcum squirting from her cunt in a torrent as her pussy walls constricted around that pounding prick like a steel fist in a velvet glove.

“Damn...you cum like a fucking freight train, fish bitch,” Isaac groaned, his cock throbbing in her madly constricting cunt, but he didn’t stop. He fucked her through her orgasm, driving his cock in and out of her with an almost machine like efficiency, pounding her offered up cunt until her asscheeks were scarlet from the repeated impacts. “I’m gonna fuck your brain into mush, you monster bitch...you and the rest like you will learn to leave me the fuck alone!” He rumbled, his balls slowly starting to draw up and tense as he plowed the madly cumming Undyne like an animal.

Undyne clawed at the ground underneath her, no longer trying to get out from under his heel, but to thrust back against his madly pounding prick. She was fuck drunk, her eye rolling in its socket as she reached another brutal orgasm, her fluids squirting from her abused twat in a near torrent as Isaac rutted her to the point of mental collapse. His cock slammed against her now near bruised cervix with each balls deep cockplunge, as if seeking to batter through her last barrier and deposit his potent wadd directly into her eager womb.

Undyne, proud captain of the royal guard, strongest warrior in Snowden, dedicated servant to King Asgore and the harvester of human souls....screamed like a bitch in heat as another orgasm clenched her guts into knots. Her entire body tried to curl in on itself as her shrieks of absolute pleasure echoed through the garbage dump around them undercut with the wet slapping of flesh on flesh.

“You fucking...human...bastard...fuck me,” Undyne mewled, her eye rolling in its socket as she panted underneath him, her deliciously gripping insides rippling up and down his pounding prick. She moaned as something gave inside her mind, like a high tension cable snapping, and suddenly she didn’t care anymore. All she wanted was his cock and she didn’t care what he did to her as long as she got it. She threw herself into it, embracing her submission to that perverse human, she gave in to the surging and brutal pleasure that hammered against the barriers of her rapidly diminishing mind and let out a howl, “FUCK ME...FUCK ME, YOU MAGNIFICENT BASTARD!” She tried to thrust back against him, her hands grasping for any handholds to give her enough leverage to buck back against her brutal lover, but his heavy boot kept her agonisingly in place, the heavy treads biting into her skin as she struggled to throw herself into the animalistic rutting.

“That's right, you blue slut,” He growled, his eyes half lidded and his teeth clenched as he tried to hold back his impending orgasm as his balls tensed, “You are my bitch now...I will do with you as I please, whenever and however I want.” He rumbled, sweat beading on his brow as her madly clenching cunt milked his pulsing shaft. “You belong to me and you will never be anything more than my personal fucktoy!” He snarled, his nostrils flaring as he sped up, driving his cock harder and harder into her swollen and bruised cunt, “You may be a warrior and a royal guardswoman, but none of that means anything in the face of you worshipping my cock!”

“YESH!” She screamed, her words slurred as the fuck-drunk monster bucked under him, “I am your fucktoy, I am your little blue BITCH!” She proclaimed, her cunt spasming around his slick shaft as she accepted her debased new status as a human’s personal fuckdoll. “I am your-” She was cut off as a SCREAM of absolute agony and ecstasy ripped her lips as his cock finally broke through her long besieged cervix. His cock slammed forward, hammering into the back of her womb with the force of a post driver, sending her over the edge...and him as well. His balls clenched as his eyes shut, holding himself deep within her as his balls finally gave up the ghost, drawing up and letting fly his seed directly into her eager womb. In long, womb filling, ovary soaking and egg demolishing spurts, he filled her baby chamber with his thick cum. It was a veritable torrent of seed, stuffing her womb to its limits and filling her fallopian tubes with his eager jizz, each one seeking out a fertile little egg to plant themselves in. Neither of them knew if monsters and humans could breed and neither of them cared at that moment, but they were going to find out.

Her mind went blank, whiting out as her tongue hung free of her lips, resting in the dirt beneath her. She lost her mind, her body bucking as random signals raced through her broken mind and the most powerful orgasm she had ever experienced rearranged her mental faculties. She went limp in his grasp as she felt her womb being filled to the brim with his wadd. It was like a firehose was set off in her cunt, causing her stomach to bulge out with the raw amount of cum that was being pumped into her sopping wet snatch. Soon it backfilled, breaking the seal of her cervix and flooding back down, squirting out of her twat to soak his groin and clenching balls in a thick mixture of his cum and her juices. She felt like she was on another planet, gibbering and mewling in ecstasy as he stuffed her, her eye rolled up in her head as she was reduced to a mass of raw nerves and fuck-addled synapses by the raw power of her orgasm.

Isaac sighed and pulled back from her completely stuffed cunt, lifting his boot from her head and stepping back, pulling his still spewing cock free of her cum stuffed twat as he let his last few spurts of cum squirt across her offered up bubble butt, quivering back and long crimson hair as his ball draining climax came to end. He smiled down at the fucked mindless Undyne and shook his head at the whimpering and madly spasming woman before him, loving how she had been a proud and haughty cunt not an hour before. He shook his head and let out a laugh at her, giving her already pounded scarlet ass a nice SMACK before sinking his fingers into the wondrous meat of her bubble butt. “I think i will keep you...I always wanted a pet fish,” He said with a snicker, loving how his touch caused her to moan in pleasure, “You are gonna be good company as I figure this place out...and who knows...maybe you will lead me to a few other sluts that need to get a good cocking.” A wide grin crossing his face as he spoke.

Undyne could only moan in response as he laid claim to her, the once proud royal guard reduced to a fuck maddened whore laying in filth and at the absolute mercy of what should be her worst enemy and all she could think about was getting him to fuck her again.

Undyne the Undying met her end that day and Undyne the Slut was born...and she couldn’t have been happier.


Thanks for reading the first chapter!

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