Mr. Monster

Sunny’s augmentation had little to no impact on Seojun’s day; sure, it was a little more troublesome to put boxers on the following morning, but he figured he could solve that problem by simply buying slightly larger sized boxers with his overabundance of capital courtesy of Taeyeon. When Seojun went to pee that morning, he discovered something else that was different: he couldn’t fit his morning wood into the toilet hole. To compensate, he scooted back onto the toilet seat much further than he was accustomed to before finally being able to fit it inside.

“So that’s one of the downsides of having a larger dick, huh…”

The rest of the morning went trouble-free, Seojun having his breakfast by himself at the kitchen island table. While it initially bothered him a little, Seojun learned to not mind Taeyeon not coming back home too much; after all, there weren’t many people in the world who posed a threat to her. And, given she was a woman with business from all corners of the world, it was hardly surprising that she might not have time to come home on occasion.

Seojun was just her Servant, he understood that; he was her subordinate, she wasn’t beholden to him, why should she have to tell him where she was going? Maybe it was the fact that she so often did explain why she wouldn’t be home the nights she couldn’t return home that built up the expectation. Still, the unexpected absence of Taeyeon at the kitchen table (since succubae had no need to consume food, Taeyeon usually just sat at the table to keep him company) saddened him.

Or maybe saddened wasn’t quite the right word. What he was feeling was closer to frustration: not an angry frustration, but a mixture of a sorrowful and a sexual frustration.

As great as the sex was with Sunny, the first and foremost thing on his mind after having been augmented was Taeyeon. His mistress had told him that size didn’t matter to a succubus, but still, he couldn’t help but fantasize fucking Taeyeon with his newly acquired augmentation. Would she feel tighter? Would it take longer to fit his entire length inside her? Would it feel better? Would he be able to reach deeper inside her? What would the feeling of her pussy stretching around his larger cock feel like?

All those questions had gone unanswered the entirety of the day prior and persisted until after lunch, when Taeyeon burst through the door as Seojun was walking away from the kitchen, having just done the dishes.

“Seojun, do you have plans for today?”

“Welcome back—oh, um, no, I was just going to go to the gym, but that was the only thing.”

Hearing that, Taeyeon’s face lit up. “Great!” The sight, in and of itself, was so adorable that Seojun couldn’t help smiling in kind. It was so bizarre, seeing the face capable of such destructive seduction smiling in such an innocently luminescent fashion. Seojun would be lying if he said that he was fully accustomed to remembering this Taeyeon was the same one who moaned his name at the top of her lungs as her vagina geysered out its nectar onto his dick. “I’m booking you for the entire day,” she told him, closing the door behind her, taking her shoes off and folding her wings back inside her body.

“For the entire—? … Um, for what?”

“Well, seeing how shrinking your penis back to its original size isn’t something Sunny can do with confidence, I figured I would take the time to get used to your larger cock.”

Said cock perked up, Seojun’s jaw dropping to the floor in parallel.

“Wha—for the whole day?”

Going an entire night was something he had already experienced with Tiffany, and while Tiffany’s body was amazing in its own right, there was something special about Taeyeon to Seojun that always made her more appealing. Maybe it was because she was his first, or maybe it was because she was his mistress, but the prospects of being able to enjoy Taeyeon’s body for an entire day made him salivate at the mouth—and other places too.

“It’s not just my pussy that needs to get used to stretching a lot more, you know,” she said, casually as ever, strolling into the living room while throwing her top off. “My transformations of you needs to readjust to your newer, larger size too.”

“Oh, I see…”

By the time Taeyeon was in front of him, she had already stripped every last bit of clothing off her svelte form, leaving Seojun dumbly staring at the masterful piece of art before him. No matter how many times he had seen it, the sight of Taeyeon’s bare body never failed to bewitch him: the perfectly taut, unblemished, pearly white skin that stretched over her entire body, her relatively small yet ample bust adorned by a pair of delectable pink buttons that begged to be squeezed and bitten, the soft inward curve of her waist and outward curve of her hips, the shining glean of her milky-smooth legs, it was all, simply, perfection. It was something Seojun doubted he, in the next few hundred years of his life, would ever get tired of seeing.

“Do you want me to take your clothes off?”

“Oh, no, sorry—” embarrassed, Seojun flung his shirt off, his pants and boxers soon following suit.

“Go ahead and sit down on the couch.”

Seojun obeyed without a second thought, the majority of his brain’s bandwidth preoccupied with drinking in the beautiful, erotic sight in front of him. While Seojun never took himself to be a sub, especially given how much he enjoyed dominating Yeoreum and Tiffany and Sunny, there was something about Taeyeon’s supreme confidence, from the confident way she bared her nude body to the calm and collected way she spoke, that made Seojun all but willing to submit to her.

Despite the numerous times it had happened already, Seojun still found his breath hitching when Taeyeon’s silky-smooth legs settled atop his own, caressing them in a warm, gentle embrace. “Let’s go slowly this time, OK?”

“O-OK.”

Hearing the jitteriness in her Servant’s voice elicited a giggle from the dainty demoness. “There’s no need to be nervous. Or maybe you’re excited?”

“Bo-Both.”

To that, Taeyeon smiled, reaching a hand down to gingerly caress his now throbbing cock in her hands. Seojun let out a hiss, an electrical current shooting through his spine, shivers running from the top of his head all the way down to the tips of his toes. “Tell me, what exactly are you excited about?” The sultry whisper drifted into his ears, the allure from her voice alone driving the semi-human man crazy.

“A-About—” Seojun struggled to get the words out, Taeyeon’s hand sensually, slowly, yet firmly, rubbing up and down the entire length of his shaft. What got him past the hurdle was the steady, warm gaze she trained on him, her black orbs communicating such a desire to listen that they seemed to milk the words out of his throat. “—feeling you squirm, and listening to you squeal, as I destroy your tiny cunt with my massive cock.”

Hearing the words curled the edges of Taeyeon’s lips upwards. “Oh, is that so?”

Seojun nodded, his fingers gradually curling into fists as Taeyeon’s steady handjob injected more and more bursts of pleasure into his body. “I was thinking about it all day yesterday.”

“Aww, I’m sorry baby,” she cooed, gently patting his cheek with her free hand while the other hand gave his cock a squeeze. Seojun bit his lip, suppressing a moan as another, stronger electrical current was sent up his spine. “I was spending yesterday getting ready for today.”

“Getting ready?”

“Mmhm.” The entire time, Taeyeon hadn’t broken eye contact with him once, and while Seojun wasn’t the greatest and maintaining eye contact, something about her eyes kept his gaze magnetically locked to them. “I went overseas to get fucked by some American guys so I could get this tiny cunt reaccustomed to larger dicks.”

The ardent blaze of jealousy that flared up inside him was all but drowned out by the insanely hot imagery of Taeyeon’s petite stature surrounded by a group of burly American men with their hard cocks out, each waiting their turn to fuck the delectable specimen of a female in front of them.

“Oh, you’re getting bigger; you find the idea of me getting gangbanged that hot, huh?” Taeyeon said, stifling a chuckle with a pair of curved lips and a set of smiling eyes. “Don’t worry, none of them were as big as you.”

Those words were something Seojun had given up hope in hearing, convincing himself that the below-average size of his dick said nothing about his status as a man, that comparing something randomly dictated at birth was meaningless—but when he heard those words of reassurance from Taeyeon, his chest swelled with pride.

“Look at you, getting so excited. What a cutie~” He understood the words were a byproduct of the chasm of an age difference that existed between the two, but he still found himself feeling indignant at the nickname. So when her gaze finally broke, traveling downwards and landing squarely on his erect cock, seeing her enlarged pupils and parted lips immediately erased the indignant feeling. “Or … maybe ‘cutie’ is the wrong word to use … wow, what a monster you have there…”

As if entranced, her free hand joined the action, the other set of dainty fingers wrapping around the bulging circumference of Seojun’s cock. Everything about Taeyeon was pristinely beautiful, and that included her hands and fingers. The immaculate care the succubus applied to every part of her body, including her hands, was something he also admired about Taeyeon. Though they weren’t often the object of his admiration, he will found himself enjoying the beauty in even her hands during moments like this, when Taeyeon was giving him a handjob. However, this time was slightly different; this time, when he directed his eyes down at Taeyeon’s fingers wrapped firmly around his girth, he came to realize just how small they appeared next to the cock that all but dwarfed the digits it was trapped between. Before, both of her hands were enough to cover his entire length with about an inch to spare; now, they could only cover a bit over half.

The sight aroused him even further, the thought of ripping through Taeyeon’s small, tight hole with the cock her hands once had little trouble covering but was now struggling to do so building up the anticipation more than ever.

“Fuck … all of this is going inside me, huh?”

And, for the first time since meeting Taeyeon, the usually supremely confident succubus let out a nervous chuckle.

Honestly, Seojun figured Taeyeon wasn’t even capable of feeling emotions such as nervousness or anxiety. Sure, when they were roleplaying, Taeyeon had no problem expressing those kinds of emotions realistically, but Seojun understood them to be an act. However, this time, he could tell the nervous chuckle was completely genuine.

So this is one of the upsides to having a larger dick, huh?

It was at this point that Seojun felt the roles reverse; now Seojun felt like the one full of confidence, and Taeyeon of nervousness. “Well, we do have all day, right?”

Taeyeon nodded, her hands coming off his cock and onto his shoulders, taking another deep breath before lifting herself off his lap. “Are you ready?”

Seeing the careful, hesitant manner in which his mistress was approaching him, Seojun turned the question back onto her. “Are you?”

Seojun playfully brushed the tip of his rock-hard dick against the dripping wet lips of Taeyeon’s sex, an action that made Taeyeon gasp in surprise. Her lips pressed against each other, another deep breath entering her lungs and out her mouth. “One way to find out.”

With Seojun’s hands planted firmly on her hips, Taeyeon began guiding herself downwards onto his dick. Even at first contact, the difference in size was immediately transparent: her labia began parting as the tip of Seojun’s cock slid between them, her wet folds spreading further and further and further apart. The muted sighs and groans started leaking through Taeyeon’s sealed lips as the entire, swollen tip of his cock found itself surrounded on all sides by the hot, wet walls of her vagina. However, they weren’t given a chance to rest, Seojun’s girth forcing Taeyeon’s pussy wider apart with every passing moment. “Fuck, Sunny made you thicker, too?”

“Are you OK? Should we go slower?”

She shook her head, much to Seojun’s relief. “No, it’s just … I’m not used to this…” Taeyeon bit her bottom lip, her eyebrows furrowing in concentration, gaze absentmindedly directed at his chest as she pushed on, her vaginal walls stretching to their limits in the wake of the monster that was forcing itself between them. “It … it’s so fucking big…”

“Taeyeon…”

“I’ll have to…” Taeyeon’s fingers dug into Seojun’s back, her well-manicured nails piercing Seojun’s skin and drawing beads of blood. However, the pleasure of the vice grip of Taeyeon’s love canal overwhelmed any sensation of pain. “…take in this monster…” Seojun’s hands, which were still resting on Taeyeon’s hips, had long loosened its grip, fearing the impulse to pull her the rest of the way down overtaking his sensibilities, “…every time…” the grimace on Taeyeon’s face spoke to the struggle she was undergoing, trying to accommodate an oversized guest, but also of the waves of pleasure streaking through her body with each centimeter of progress. “…I need to feed, huh?”

He was barely half way in and he could already tell Taeyeon was starting to struggle, the tightening sensation around his dick having gradually increased to an almost painful level. The sensation was completely foreign, and while there was some level of discomfort, the novelty of the sensation drowned out any negative feelings. At this point, Seojun’s hands completely vacated Taeyeon’s hips and were resting at his sides—he no longer trusted his own willpower to preventing himself from pulling her delicate figure downwards, shoving the rest of his length and girth into the cramped, damp hole.

It felt like his first time all over again; not only was the tighter sensation pleasurable, but the feeling itself was more intense; Seojun vaguely remembered Sunny’s explanation, that there were new nerve endings to his increased length, so it made sense given that it was primarily that elongated part of his penis buried inside Taeyeon’s heat. The tension had built up quickly in his lower regions, but now that he was more experienced with the feeling, he had greater control over it; he wanted to wait at least until he was fully inside of his mistress before releasing.

“Was this … everything you imagined?”

Taeyeon’s eyes found Seojun’s for the first time since starting, offering a lopsided smile to him. “Yes, it’s—fuck—” Seojun was interrupted as Taeyeon’s pussy gave his shaft a swift squeeze. Taeyeon responded to his questioning gaze with a playful smirk, although hints of her struggling was still present on her face “—it’s so constrictive that I feel like I can barely breathe, but your tight snatch feels amazing around my cock.”

“That’s good…”

The progress was slow but steady, and by the time there was about a quarter of the way to go, Taeyeon stopped to take a short break. “What’s wrong?”

“Sorry, Seojun, let me take a bit of a break…” Taeyeon hung her head, her hands still fiercely gripping his shoulders, her chest rising and falling with every breath. Her eyes were closed, her lips parted, her beautiful, almond hair creating a curtain around her face. “I didn’t think your monster wouldn’t be so thick.”

“You can thank Sunny for that.”

“Hmm…” the hum, incredibly simple yet stunningly beautiful nonetheless, seemed to resonate about the living room, “…admittedly, I spent so many years content with smaller, more palatable dicks that I had forgotten the upsides of larger ones.” The discomfort and the exhaustive struggle was being fended off by the occasional slivers of precum that her reproductive organ—or rather, digestive organ—lapped up and absorbed with haste. It wasn’t even the bodily fluid that had put the demoness in such a fervent heat; the sheer size of her Servant’s cock caused the potency of its life force to ooze out of the throbbing member and directly into Taeyeon’s body. It was something she hadn’t experienced in a long time—decades, centuries even—and Taeyeon absolutely reveled in it.

“Taeyeon…”

The succubus raised her head, meeting the concerned eyes of her Servant. “What’s the matter?”

Seojun figured he wouldn’t need to say much more as Taeyeon was always able to tell when he was on the verge of orgasm, but the questioning gaze told him that, for whatever reason, she didn’t pick it up. “I’m getting close, do you mind…?”

Taeyeon, who had been so preoccupied with the daunting task of cramming the entirety of her Servant’s gigantic cock inside her tiny hole, had forgone almost every other one of her senses in favor of the overwhelming sensation of pleasure with traces of discomfort and struggle. When Taeyeon realized this, she was in part disbelief but also in part awe—when was the last time she had lost herself like this?

“Aw, I’m sorry, you’ve been so patient, haven’t you?” Taeyeon, though disheveled, brought her gaze to match Seojun’s once again, a gentle hand caressing the cheek of the younger man. “I should reward you. Go ahead, push the rest of that monster into my cunt.”

The words barely left Taeyeon’s mouth before Seojun had done the deed, a shrill shriek of pure ecstasy ringing throughout the house as Seojun’s cock split the walls of the moaning succubus, burying itself deep within her walls and firmly pressing against the hard barrier of her cervix. Her soft bottom slammed down onto his groin, cushioning the blow slightly.

“Fuck, Seojun, it’s so big, oh fuck, it’s so much—”

Incessant moans streamed out of Taeyeon’s mouth, Seojun’s body similarly tensed up, his hands created red finger-shaped marks on her otherwise perfect skin.

“Taeyeon, I-I’m about to cum…”

“Wait, please Seojun, give me a chance to get used to—”

“I’m sorry Taeyeon, I-I can’t!” Try as he might, Seojun could no longer hold it back. With a loud yell, Seojun’s entire body shook with the ferocity of his orgasm, torrents of the sticky sustenance ejecting straight into the deepest parts of Taeyeon’s womanhood.

“Oh—Oh, god!” Taeyeon’s insides erupted with heat, the triple-whammy from the sheer size of Seojun’s cock, its aura, and the delectable semen embedding itself deep inside her quickly overwhelming every single one of her senses. “Fuck, it’s so hot—” Taeyeon’s wings unfurled, her horns popping out of the top of her head, losing all sense of self control as stream after stream of semen was deposited straight into her womb. “—fuck, I-I can’t, Seojun—” In that brief moment, Taeyeon went from getting there to being on the precipice, and that sudden change, on top of everything else, was what pushed her over the edge. “—Seojun!”

Taeyeon’s orgasm rolled over her entire body, her petite frame shaking uncontrollably against Seojun’s sturdier one, her eyes rolling to the back of her head, her toes and fingers reflexively curling, her back arched, her midnight wings stretching as far back as they could, and her legs quivering as tidal wave after tidal wave of her own juices washed over Seojun’s shaft still firmly lodged inside her.

“Taeyeon—oh fuck…” Seojun muttered, a shudder running down his spine as the wild bucking from Taeyeon’s orgasm overstimulated his dick at the end of his orgasm, milking out a few more, weaker ropes of his viscous seed.

When Taeyeon’s orgasm had finally subsided, her head landed on the shoulder of the younger man. “I feel like I’m going to be sore tomorrow…”

“Really? Can succubae get sore?”

“Well, yeah—I mean, humans can get stomach aches from eating too much, right?”

“Oh yeah … yeah, that makes sense…”

Taeyeon giggled, patting Seojun’s cheek lazily. “Give me a minute or two, because I think if we go again too quickly, I might black out from overstimulation.”

The post-orgasm exhaustion definitely was starting to affect Seojun, but the squeezing motion of Taeyeon’s sex didn’t give the exhaustion much of a chance to settle in. Instead of his erection growing softer, it remained just as hard as before, being massaged on all sides by Taeyeon’s pussy.

“I think I might have to unhinge my jaw if I want to take this monster into my mouth…”

Seojun directed his gaze at Taeyeon, whose head was still resting against his shoulder but was turned away from him, looking at her tail which had morphed into the larger version of his penis. “Is this about right?” She turned it so that she could look at the pulsating, veiny shaft from the side. “Oh wow, I can’t believe this entire thing is inside me right now…”

Taeyeon brought her transmogrified tail closer to her face, pressing her cheek against the erect cock. Seojun groaned under his breath, both from feeling her soft cheek on the side of his dick while it was being suffocated by Taeyeon’s vagina, and from the strikingly arousing visual of her tiny face pressed against by the comparably large, if not larger, side-profile of his throbbing member, Seojun felt his arousal spike back up.

“I wonder if this can even fit inside my mouth?” Taeyeon asked, seemingly more as a question posed to herself, rotating the tail-dick so that it was directly facing her. Without much more of a warning, she swallowed the entire tip whole.

“Ah, fuck—” the surprised moan leaked out of Seojun’s mouth, the additional feeling of her tongue twirling around the sensitive tip of his sex organ causing another injection of pleasure to enter his system.

Taeyeon let out a pleased moan as a sliver of precum leaked out, her tongue quickly lapping it up and sending it directly to the back of her throat. Taking that as a cue to continue, she pressed forward, her velvety lips gliding forward ever so slightly, bit by bit swallowing his cock until just over a third of it had disappeared inside her mouth.

“Taeyeon…”

“Let me turn around, I want to be able to fully enjoy this.”

Taeyeon lifted herself ever so slightly, creating just enough space to swing her legs around and turn the rest of her body away from him. With that, she let her body drop back onto Seojun’s lap, a groan coming out from the both of them as Taeyeon’s marshmallowy butt settled onto Seojun’s groin. “Much better.” With that, she inserted the dick back into her mouth.

The cycle was starting back up, the tension starting to form in his nethers as Taeyeon’s masterful tongue danced around the perimeter of the tail-dick. She kept it there for a few seconds before pulling it back out, her tongue running along the underside of his cock. “Mmm, that’s going to be a little more difficult,” she noted, planting kisses along the length of his shaft. “How’s my pussy?” she asked, playfully shaking her ass against his groin. Seojun groaned, the friction sending a surge of ecstasy up his body. “Nice and snug?”

“Ye-Yeah. Are you getting used to it?”

“It still feels like my pussy is still being stretched out, but I’m getting there.”

Seojun opened his mouth to respond, but what instead left his mouth was a warbled moan, Taeyeon having reinserted the transmogrified dick into her mouth. A pleased hum emanated from her throat as she pushed the stiff shaft into her mouth, making it a few centimeters deeper before pulling back out. “Mmm, it’s so big, I feel like I could do this all day…”

Her hands joined her lips, firmly securing the lower half with one hand while dribbling a warm layer of saliva onto it. After having dribbled enough of the viscous, translucent fluid onto his cock, both hands came up to slather his length with it. Seojun gritted his teeth, fighting back the budding signs of his second orgasm already forming. Although it was still a pretty decent distance away, if he wanted to survive the entire day, he needed to be more resilient than this.

After having sufficiently lubricated it, Taeyeon pushed the now shining dick into her mouth. With the aid of her hands, her progress jumped ahead, having swallowed almost half of his cock before being forced to retreat. “Wow, fuck, if it wasn’t so wide it wouldn’t be so difficult…” she commented, massaging her jaw with her hands, opening and closing it a few times for good measure.

At this point, Seojun’s eyes were closed, his hands tightly gripping the waist of the small succubus. The constant squeezing of his dick by Taeyeon’s tight snatch, the soft pressure of Taeyeon’s firm ass against his damp groin, and now the added feeling of Taeyeon’s warm saliva coating his member along with her lips and her tongue pressing against the circumference of his cock was quickly becoming overwhelming. Taking deep, controlled breaths was all he could do to slow down the impending march of his second orgasm, Taeyeon continuing to experiment with deepthroating his cock, none the wiser.

With how unphased Taeyeon now seemed by the cock firmly wedged inside her ever-tight hole, Seojun figured she had all but gotten used to it. However, it became apparent that Taeyeon was masking the effect of his cock on her when, a few minutes later, Taeyeon completely stopped, slouching over and placing her hands on her thighs.

“Fuck … it still feels like you’re splitting me apart, Seojun,” she said, chuckling. “Why did Sunny have to make you so massive?”

“It’s OK, we still have the whole day—wait,” Seojun stopped, a thought just now occurring to him. “How am I going to last the whole day?”

“Tiffany should—” as if on cue, the door opened, the two of them turning their heads to see a disheveled Tiffany standing at the doorway, stumbling into the house while folding her midnight wings back into her body.

“Sorry, I got—oh you already started?”

“I told you, Fany, you get tomorrow. Be careful though, he’s probably bigger than you’ve had in a long time.”

This perked Tiffany’s interest. “Oh, really?” Taeyeon lifted her tail, which had since reverted to its original state, up to eye level, and transformed it back into the thing she was trying to fit inside her mouth minutes ago. Seeing the newly elongated size of Seojun’s cock just about caused Tiffany’s jaw to drop onto the floor. “Oh my—holy fuck!”

“Right?”

“Wow, I need to really thank Sunny later…”

Seeing Tiffany’s hungry eyes directed at him, a mixture of emotions welled up inside Seojun: elation and anticipation, but also anxiety and weariness. The day had barely started, and he was going to have to do this all over with Tiffany tomorrow?

These were going to be a long two days.