Ken is a mage in Fairy Tail, and he has gotten his hands on a very special magical tome that can let him rewrite reality. Naturally, he uses this to indulge his fetishes.
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Ken was nobody special. He was an unremarkable wizard and a thoroughly forgettable member of Fairy Tail—his specializations were as mundane as magic could get, and when it came to a fight, he would be far better off on the sidelines than in the fray. He was not too old and not too young, a similar age to the stars of the guild but without any of their talent or fame (or infamy), and most people outside the guild wouldn't even recognize him as a member. Hell, sometimes even some of his own guildmates didn't realize he belonged to Fairy Tail…
But while he didn't stand out, he did have friends, and if he didn't have any noteworthy magical specialties, he did have a reputation for collecting interesting trinkets and artifacts. Most of them weren't especially powerful, but now and then he would get his hands on something extraordinary. This was one of those times, and Ken was especially eager to try out his newest acquisition.
'As the mirror reflects the real, so the real reflects the image, and
As with the Maker's Word, so with the words here scribed:
As it is written, so it shall be, neither emended nor revoked, but
As it is written, ONLY as written, and forevermore unchanged;
Such is the magic of this text, and of any text here scribed.'
This was etched on the inside of the front cover of a plain, black, hidebound grimoire Ken had obtained from an unwitting antiquarian, a faded and careworn text whose frayed and yellowing pages were all blank and unnumbered. Apart from a fading title, "ARS AUGERE", that message was the only thing written in or on the book. But Ken recognized the title of the grimoire, and he realized that it was a powerful magical tome: a legendary artifact imbued with some of the deepest of lost magic. And it was his at a bargain for just twenty jewels.
Naturally, he was eager to try it out. Naturally, he thought of many inappropriate things he could do with the magic this tome was supposed to contain. But he was hesitant to try anything too big—anything he might not be able to reverse—until he had a better idea of its limits.
Which was why he had invited Erza Scarlet. She was intimidating, a fearsome and formidable woman, and although they were members of the same guild, Ken had always been a little hesitant to approach her. But with the assistance of the Ars Augere, he was able to overcome that trepidation.
'Erza Scarlet is a good friend of mine.'
She thought nothing strange of it when Ken invited her to his room to see a new spell of his. Why should she? She was a good friend of his, of course, and this was just the kind of thing friends did for each other.
So Erza sat on the end of Ken's bed in his room, and Ken sat at the head of his bed, looking at Erza in her armor and thinking with wonder of how one of the most beautiful girls in the guild was in his bedroom—one of the most beautiful girls, and more importantly, possibly the absolute thickest girl in Fairy Tail. She was well up there, at any rate, with huge, plump breasts and a perfect, massive ass, so it was no wonder that he would want to try this out on her first…
"When are you going to show me this new spell, Ken?" asked Erza, breaking in on his thoughts. "Do I need to prepare myself for it in any way?"
Ken nodded, a little distracted.
"Yeah…" he said. "You should get naked."
He looked at Erza and held his breath, waiting for a response. There were any number of ways this could end, and far too few of them were good. But if the magic worked…
'Erza Scarlet will do whatever I say.'
"Completely?"
Ken gulped.
"Yep. Completely naked."
Erza frowned. There was a niggling in the back of her mind, a sense that there was something unusual about this. But she did not dwell on that. It seemed unimportant. She simply cleared her mind and focused on her magic, and with a movement of will as effortless as raising a pinky finger, Erza shifted her armor through space and time, unequipping and exchanging it for her birthday suit in the blink of an eye.
She was now sitting buck naked at the end of Ken's bed, and she had barely even a blush. She was only the slightest bit flustered about this, her composure barely jostled, and she plainly saw no reason why it should be a problem for her to be in this state while alone with a man her own age. At most, she was just a tad impatient to see Ken's new magic, and she stood up and placed her hands on her hips, turning to face him.
Ken could see her breasts hanging bare and pendulous, glorious globes of milky flesh. He could see her pussy crowned by a tuft of scarlet fuzz, a plump sex pristinely pink. He saw her athletic and yet curvaceous body, the redhead stacked like few others, just as trim and toned as she was plump and busty. It was a magnificent body, almost cruelly gorgeous, and Ken shivered at the sight of it. But what he wanted most to see was out of view from his position, with Erza facing him as she was.
"Okay," she said. "I'm naked. What now?"
"Turn around."
Erza cocked an eyebrow, but she raised no protest and simply shrugged before doing as he said. Now her back was to him, and Ken stared at Erza's ass for a long moment, drinking in the sight of her grand, splendid glutes and the entrancing cleavage of her crack. He gawked and goggled and silently rose from the bed, then got down on his knees behind Erza.
He could feel the ambient warmth of her body, and he could see her skin redden as his breath swept over it. He was mere centimeters from her, and the proximity of his lips was raising goosebumps over the small of her back, but Erza did not give an overt reaction. She only shivered a little.
Ken ogled her ass. This close up, he could see just how huge and hefty the redhead's rump really was. Her cheeks were laden with a pillowy softness, made bigger and rounder and perkier by her substantial gluteal muscles, and the cheeks of her ass seemed to be pushed up invitingly by her long legs and her ample thighs, those humongous hindquarters thrust back and uplifted as if in unconscious presentation or even intentional invitation.
He leaned in closer, so close that his nose was nearly nestling in Erza's crack, and the redhead glanced over her shoulder at that moment to see him in this very position.
This raised just a bit of suspicion in the swordsman, and she interrogated him with a still raised eyebrow.
"What are you doing?"
Ken did not answer. He only pressed his lips flush against her skin, then parted them, letting his tongue come slithering out. He slid his lingual member into Erza's crack, and with the deftness of a master orator, he let it dance up and down, compensating for a lack of experience with unashamed enthusiasm, a boldness born less from confidence than from sheer, unfettered desire. It swirled and twirled, twisting and flicking this way and that between the redhead's meaty cheeks, laving its way over her skin, exploring her. And Ken hummed, vibrating his lips against Erza's backside, causing her buttocks to ripple and jiggle, making a very indecent noise as he motorboated Erza's ass.
Erza's eyes were wide. Part of her wondered what on earth Ken thought he was doing, while another part of her wondered why she wasn't trying to stop him. Was she just stunned by disbelief? But for some reason, this didn't seem as unbelievable as it ought to have. Somehow, for some reason, despite that instinctive urge to demand the cessation of these activities and extract answers from Ken, a larger and more predominant part of Erza was content to let the man continue to do as he wished. She was feeling warm from his touch, and she tingled in the awareness of what he was doing, thrilled by his lascivious attentions. Her pussy was growing damp, and her body was becoming compliant.
She was aroused, and against her better judgement, she wanted to see how much farther this would go.
'Erza Scarlet likes it when I play with her ass.'
Erza grew hotter and wetter as Ken kissed and petted her ass, and she shivered and blushed and panted as her arousal deepened. A faint sheen of sweat soon was on her brow, and her frame was trembling, her knees ready to buckle beneath her. And just when she thought she couldn't take any more of this teasing, Ken spoke.
"Get on my bed," he told her, smacking his lips and petting her bottom. "Down on your hands and knees."
Erza thrilled at his words, realizing where this was going and knowing why it excited her but being still too proud to admit it to herself. But she was turned on, and she happily complied with his request, getting onto his bed as he bade her, dropping to her hands and knees. Her breasts dangled, and her ass was lifted into the air, Erza taking care to face him with her backside.
She heard the bedsprings creak and felt the mattress shift as Ken climbed on behind her. She heard the softest clap sound of his hand grasping her buttocks. Then she heard a much louder SMACK as both of Ken's hands smote her posterior, beating her fleshy ass like a great big drum and causing its surface to churn like a pink, roiling sea. Erza cried out from the impact, hurt but not displeased, hotly blushing and ready for whatever would come next.
She felt him spread her cheeks, pulling them wide apart. She felt the air against her twitching anus. Gulping, nervous in her anticipation, Erza peered over her shoulders to see Ken licking and wetting the fingers of one hand. Then he smiled and pressed them into her ass, first one, then two, then three, pushing his fingers into her anus to moisten it and working them around inside her anus to stretch it out. She gasped at the first penetration, a total anal virgin, eyes going wide in shock but not quite dismay.
Erza "Titania" Scarlet shuddered, tingling from head to toe, but most of all feeling the stimulation of her anus. Ken was preparing her, and the proud Fairy Queen was keenly, excruciatingly aware of what these preparations were for. And when the blunt, fleshy tip of something long, thick, and hard pressed between Erza's buttocks, when the head of Ken's cock ground itself against her gaping, loosened, lubricated anus, pushing its way in and stretching her out even more than ever, Erza tore her mouth wide open as if to exclaim, as if to scream and howl and moan.
But no sound came out. Erza was utterly dumbstruck, stunned by these sensations, and she could not do more than weakly, happily whimper as Ken proceeded to vigorously, fervently, furiously fuck her ass.
Erza's ass cheeks clapped and wobbled, jolting and jiggling in response to Ken's thrusts. His cock, surprisingly thick and rigid, drove back and forth inside her, in and out with a passionate fervor. He was pounding her asshole, pummeling it with a lascivious onslaught, pummeling her plump, bouncy booty with a rapacious, insatiable rod. She was tight, so tight that Ken felt like his dick would be crushed by the slightest spasming of her anus, but he couldn't stop fucking her, and Erza was in such a state that, had he tried, she would have begged him not to.
The redhead's face was a crimson deeper and more vivid than that of the hair which was her namesake, and her breasts pressed against the bed so that they were nearly flattened beneath her torso. Her back arched, curving like the bend of a river, and her hips rose in a convulsion like the upheaval of hills, striking Ken's pelvis and sandwiching his length more snugly between her buttocks and burying him more deeply still in her throbbing, stretched out asshole. Her teeth were clenched, and her eyes were bulging, and spittle was shining on her chin. Low and resonant, a moan vibrated in her chest, sighing pathetically from her twisted, gaping lips.
She was loving it. She hardly knew why, and she hardly thought to question why, but she was loving it as Ken fucked her ass. The sensations were like nothing she had ever imagined, and it was all she could do not to lose her mind as she was reamed and reamed and reamed by Ken's fat, throbbing cock. In and out and in and out he drove his shaft, back and forth and back and forth until Erza's heart was pounding, until her body was shuddering, until her ass felt like it would split in half from the frantic force of his thrusting. Her pussy clenched, and her juices spurted forth, and in the spasms of her bliss she clenched her anus, strangling Ken's erection, milking him for his semen, demanding his cum to pour out.
She didn't know why, and she didn't care why, but she was loving this, and moaned without the least hint of shame's restraint as Ken came inside her, pumping her ass full of his seed.
'Erza Scarlet is a closeted anal whore.'
That was her true nature now.
Erza's eyes were euphoric, and Ken himself groaned as he pulled out. He felt weak from the satiety of orgasm, dizzy from how fast and hard he had fucked Erza. He hadn't meant to go at it quite so intensely, but once he'd gotten a taste of the swordsman's body, he hadn't been able to restrain himself.
He glanced at her anus. He was surprised to see how elastically it returned to its original shape, barely gaping at all even as semen dribbled from it, his cum overflowing Erza's ass. He smiled, and as his dick went flaccid, he crawled up beside Erza and sneaked his arms around her. She did not protest the embrace, but rather turned and pressed herself softly into it, holding him in return.
"So…" Erza said after a few minutes had passed in this position. "Not to say it wasn't fun, but… what was all that about? I thought you were going to show me some new magic."
"But I did…" Ken answered. He reached into his nightstand and pulled out the black, hidebound Ars Augere. It looked like any other spell book to Erza. A little older and more careworn than most, but she saw nothing unusual about it at first glance. Yet something inside her resonated with the book, and on some level, she realized its importance. "Without this, none of what we had just done would have been possible." He paused. "Well, maybe on a one-in-a-million chance… but not ordinarily. But with any reasonable probability. No, it was only because of this book."
"What is it?" Erza asked. "Where did you get it?"
"That's a long story…" Ken said. "But sure, I'll tell you."
And so he explained to her the nature of the book and the sequence of events that had resulted in it coming into his possession…