Chapter Text
“Professor. Did you need me for something?”
Byleth’s bright blue eyes, ever-impassive, surveyed Edelgard von Hresvelg with their usual stoicism, but even she could tell that there was a tinge of something less guarded in his gaze. He only ever got like this during a rare moment of vulnerability, when she could peer beneath the layers of ice and withdrawal and try to get a glimpse at the man beneath. She never succeeded, but she always appreciated the opportunity, unwittingly or not, to learn even the tiniest bit more about her teacher and friend.
Especially since it had been her choice, in the first place, to ingratiate herself more fully with him, to become something more than friends, than student and teacher, than instructor and pupil. It had been Edelgard who’d first made excuses to linger after class, to step a little closer than was necessary for academic conversation, and who’d first let her fingers dance across his shoulder, tickling towards the back of his neck, until Byleth had, in a rare moment of surrender, leaned his head forward, exhaled hungrily, and taken her lips in a sudden, welcome kiss.
In the classroom, and on the battlefield, nothing had changed, and none of their dynamic was altered with respect to the rest of the Black Eagles, for he was, after all, a commoner, even if he was a Professor at the Garreg Mach Officers Academy, and she was the Imperial Princess: discretion was paramount. They were still comrades-in-arms, and teacher-and-student, and none were the wiser to the hidden undercurrent of their connection. None knew of the stolen moments behind the greenhouse, or in the training grounds at night, or in Abyss, when the two of them could kiss, and embrace, and Edelgard could murmur her affection to an unflinching-yet-understanding Byleth, who would reciprocate with that rarest of countenances: a smile, slight and stiff and unpracticed, but still sincere, and enough to make Edelgard’s heart flutter in that damnable unguarded way.
Well, it wasn’t fair to say that no one knew. Hubert knew, but Hubert knew everything, and though he’d advised her against it in the strongest possible terms, he knew better than to directly countermand Edelgard. Perhaps he was still scheming against Byleth, but Edelgard knew that he wouldn’t act, not while Byleth was still her teacher and in her affections, and that was good enough for her.
What had drawn her to him? She wasn’t sure. Perhaps it was that mysterious, stoic, ever-silent manner of his, all business and restraint even in the heat of combat, focused and perennially prepared for apparently any occurrence. Perhaps it was the sincere, if detached, care he showed towards all his students, allies, and friends, ever-ready to listen and guide, even without saying a word.
And perhaps it was the…special attention he had shown her, even before they had escalated their connection.
Byleth had clearly been intrigued by Edelgard from the start, hoping to learn and understand more about what he must have perceived as a guarded young princess. Then, his fascination must have grown to encompass her hair and eyes—painful topics, but he had no way of knowing that, so she tried to be unbothered—and then become something yet more superficial, without becoming unwelcome.
Namely, a fixation on the flare of her hips, and the curve of her thighs, and the strained pressure of her rear against her coat and leggings.
Edelgard had felt his eyes burning into her butt from behind long before she’d made a move on him, and the attention had been…flattering. From anyone else, it would have been degrading, unwelcome, unwanted and humiliating, but the idea that Byleth, her teacher and mentor, was staring at the ass of the Adrestian Princess? That he was looking greedily, whenever he got the chance, at the stretch of her big butt against the bright red pantyhose that barely served to contain her backside, tugged even more taut at the slightest bend or squat? It was as exciting as it was embarrassing, and Edelgard had not been able to resist a burn and tingle in her cheeks whenever she realized that Byleth was getting an eyeful of her ass.
Once they started sojourning together, his fascination had become even more obvious. Their more extended, fuller-throated, hungrier-energied sequesters, when they were moaning and sloppily kissing, embracing tightly and snugly, were characterized by pronounced and punctuated rubbing, grinding, grabbing and squeezing. Of Byleth, as Edelgard brushed her knee and hands against his distended bulge, reveling in the minute hiss that escaped his lips when she dragged her hand across his covered cock…and of Edelgard, as Byleth hungrily stroked her wide hips, greedily felt up her thick thighs, and wantonly sunk his fingers into her tight, bubbly rear.
He fondled her ass with obvious fixation, massaging and rubbing Edelgard’s backside no matter the angle or arrangement, thrusting his covered crotch between her fat buttcheeks aggressively enough to send ripples through her rear, and Edelgard always greeted his attentions with hoarse, teasing, welcome moans, never giving word to her understanding that Byleth was in love with her ass.
But for all their touching, all their kissing, all their groping and grinding, they had never…escalated. Never stripped, never gotten anything more than vaguely physical while still clothed, and that had proven to be a sore spot for Edelgard herself, who often lurched away from such liaisons on the verge of frowning at her robbed pleasure.
But surely that was not why Byleth had asked her to remain here, after class. He certainly did not expect to drastically up the ante now, and here, of all places, in the Black Eagles classroom, at the end of the school day.
Why, then, was his gaze so inscrutable? Why was he still silent?
…Why, then, was he standing up, and moving to the door, and locking it?
“...Professor?” Edelgard asked, voice suddenly weak and wondering, almost worried, as Byleth latched the door shut, and turned to look at her.
“P-P-P-Professor!”
Edelgard’s voice stuttered in shock and rippling with anxiety and surprise, but plaintive and high and sweet all the same. Her violet eyes were wide, her mouth wider, every aspect of her countenance communicating confusion, tinged with a growing…something. Interest? Fear? Want? She didn’t know, and neither did Byleth, but he wasn’t concerned either way: he had a task, and a wish, and was acting on it with all the determination and power that he could.
Byleth pounded away, rawly driving his dick into and out of Edelgard’s untrained asshole with long, deep, brutal thrusts. Her thighs were on his hips, legs hanging in the air uselessly, feet extending behind his back as she gripped the edge of the desk so tightly that her knuckles were already growing numb. Her hips were half-off the wood, her backside hanging freely in the air, supported only by Byleth’s hands that scooped beneath her waist to hold her.
His balls, heavy and fat, aching with the promise of a long built-up load, swung forward powerfully with his every thrust. Each movement forward left them slapping obscenely against Edelgard’s jiggling asscheeks, sending ripples through her fat butt with each point of contact, leaving her whole body shuddering and jostling as the desk creaked beneath the effort. Edelgard’s asshole was wrapped around his cock like a vice, gripping urgently and desperately, unused to any intrusion, much less a barreling, urgent, overeager in-and-out motion from a dick as big as Byleth’s. The protesting squeezing of Edelgard’s butthole only served to massage and welcome his dick deeper inside, as his thick cockhead rubbed every which way inside her, dragging and rubbing, working up a wonderful friction within her rear as her anal ring bore down in desperate hopes to force him out.
Byleth had not given Edelgard the slightest warning, nor the barest space to protest. As soon as the door had been locked, he’d been upon her. Expecting a kiss, she’d puckered her lips, but he’d ignored it, and had instead dragged her unceremoniously to the teacher’s desk. His desk. Hoisting her atop it, he’d reached down to grab a handful of her red leggings.
“Wait-!” Edelgard had started to say, before Byleth had tugged, and the fabric tights had torn with a loud ripping sound. The gesture had left a hole in the material, extending down below to form a full-pelvis opening in her clothing, revealing the jet-black panties clinging to her crotch.
Byleth had then hooked a finger into the band of her panties and tugged to the side once more: this time, mercifully, not hard enough to destroy them, but it still left Edelgard’s crotch completely exposed to his hungry gaze.
But Byleth’s eyes had not been fixed on Edelgard’s pussy lips, despite how her admittedly adorable attempts to obviously fashion her bush into a spread-wing pattern in imitation of the Hresvelg eagle had resulted in her instead settling for a simple triangle of white hair. Instead, his stare had traveled downwards, beneath her cunt, and came to rest on what lay below, as he hoisted her hips higher.
On the puckered, tight, snug opening of Edelgard’s asshole. It had winked and clenched, shuddered and twitched, as Byleth looked, as if knowing that there were eyes fixed upon it, and as if recognizing that they were the very same eyes that had stared so hungrily at the buttcheeks occluding them before.
Understanding had crept onto Edelgard in that instant, and she had gasped, and opened her mouth, but no words of protest had escaped her lips. Had she been robbed of them, in the suddenness of the moment? Or, more tellingly, had she recognized what was going to happen, connected it to the build-up before this, and was…unwittingly welcoming it?
Perhaps it had been a bit of both. But the outcome was the same: Byleth was going to fuck Edelgard’s butt, and he was going to do it now.
Byleth had hoisted Edelgard’s hips up, lining her up more closely to his crotch and allowing her legs to come to rest on his shoulders, and spat a clear wad of saliva right onto Edelgard’s asshole. She had yelped in surprise at the cold contact, her squeak trailing into a throaty, unbalanced moan as he had rapidly swirled his thumb in a circle along and around her rear entrance, deliberately abstaining from nudging a digit in.
“Pr-Profe-Profes-ssor, I-” Edelgard had stammered, struggling to speak, looking down at Byleth as she supported herself on her elbows, still facing him, half of her body hanging off the desk. Her words had died on her lips as Byleth, wrenching his hand away from her asshole, had reached for his trousers and, with some one-handed struggling—his other hand had been digging into her thigh, holding her up—dragged his dick into the open.
It had been exactly as enormous as his bulge had suggested, and exactly as substantial as Edelgard had envisioned in quiet, private moments, remembering him humping between her buttcheeks. Long and thick, throbbing as it had reached full mast, with a rounded tip, flanked by his swinging, swaying, swollen nutsack, curls of blue hair delicately adorning the base. A stupefying shaft, to tell the truth, and Edelgard’s mouth had fallen open, wordless and soundless at the sight of it.
Grunting, Byleth had shuffled his trousers down to his knees, and then his ankles, and then used the hand that had been on Edelgard’s asshole to line the head of his cock up with her opening. Only then had she regained something akin to clarity, knowing what was about to happen, and with what, and to what, but when she had spoken, it had not been to beg him to stop, not openly.
Instead…
“P-P-Please!” Edelgard had mewled, her lower lip pouting, eyes fixed on the dick about to delve into her derriere.
There had remained an ambiguity in her tone, an uncertainty, and perhaps an insincere faltering. Was she begging him to stop? Pleading with him to continue? Or asking him to proceed, but with some more restraint, rather than unabashed gusto?
It didn’t matter.
Gritting his teeth, Byleth had lined up his cockhead to Edelgard’s asshole. It had twitched and quivered as he watched, anticipating his intrusion, and as the tip of Byleth’s length had pressed onto her butthole, she began to whine.
“Professoooooooor!” Edelgard had moaned, still too vague to be either a plea for him to cease or an entreaty for him to hurry up. Perhaps the logistics of it had still been on her mind: Byleth was not a particularly large man, but she was a particularly small woman, and he had been aiming his especially-thick dick at her especially-tight asshole. Could she actually take it? Would it fit?
He would make it fit.
Initially, Edelgard’s asshole had tensed and clamped shut, refusing him entry, and he had thrust forward again, grunting insistently, trying to force himself into the snugly-secured opening. The bearing and weight of his thick, insistent cockhead had rubbed her rear entrance naggingly, but he had made no progress until Edelgard had hoarsely moaned again.
“I-I-I…”
It had been croaking and weak, but it had resulted in the tiniest give, and had allowed her anal ring to surrender, and his cockhead to plunge forward with a squelch.
A sigh of relief had slipped from Byleth’s lips, just as a sob of horror, shame, awe, and overwhelmed delight spilled from Edelgard’s.
“A-A-a-ah!” She had groaned, hoarsely, wordlessly, as he had snugly secured his cockhead inside her ass.
He hadn’t blamed her: it had been a truly monumental struggle for Edelgard’s poor backside to swallow up such a giant dick, but Byleth hadn’t been about to stop or be satisfied with “just the tip.” He kept going, kept feeding her asshole more of his length with every passing moment, patiently stuffing her butt with more cock. Her rear had clutched and gripped and squeezed him powerfully, constricting down as he wrapped her asshole around his dick, bearing down so tightly that it felt as if she was trying to strangle his cock.
And then he had been buried to the base, the head of his dick knocking as deep inside her asshole as it could. Byleth had stayed there for a moment, the briefest pause, more out of relief and a desire to luxuriate in the moment than a sincere wish to allow her to acclimate. Edelgard’s eyes had widened, and her mouth had stayed agape, and her voice had croaked and rattled wordlessly in her throat.
Then Byleth had really started thrusting, and Edelgard had nearly broken right then and there, her disappeared anal virginity rapidly giving way to a new, imposed familiarity with the art of anal sex.
Taking Byleth’s big dick up the butt balls-deep every time made the memory of that initial entry seem a faded, distant, indistinct thing, far removed from her current experience of being drilled up the derriere.
Being butt-stuffed so thoroughly and so wonderfully meant that Edelgard had no recourse but to surrender. Her mind, her body, her being and soul…for the moment, for the eternal instant of being fucked up the ass with long, brutal, powerful thrusts, Edelgard could think of nothing, could conceive of nothing, but how her asshole was squeezing and gripping, massaging and stroking, and grasping and welcoming the dick that was ramming into it.
The thunderous wet clap of Byleth’s balls against her buttcheeks was a bracing, steadying sound and force, one that sent ripples up her spine as surely as it sent waves through her fat rear. Whether that was owed to the strike, or to the sensation—since such contact only resulted from Byleth’s dick dragging as far inside Edelgard’s asshole as it could—was immaterial. It produced a twisted, coiling pain and pleasure regardless, tight and hot, robbing her of breath and feeling in her legs in equal measure, running through her mind in a positive, telltale buzz that communicated wrongness and delight in similar proportion.
Edelgard’s mouth was a mess of drool and her loosely-flopping tongue, her mouth open, her eyes wild and unfocused. Her legs, by now, were wrapped around Byleth’s back, trying to secure him deeper inside her as he kept rearranging her rear, her ankles knocking together loosely as he pounded her purposefully. She was fully clothed, save for her torn leggings and nudged-aside panties, but she must have been quite the sight: toppled over her teacher’s desk, being fucked in near-full uniform. Appearing wrecked, and ruined, and utterly debased.
Scandalous! Not only was he her teacher, he was also a commoner! He was preserving her maidenhead…but little else that afforded her dignity. Yet the incongruity of it, after the fact, would have made her burn with even more shame and arousal. For she was Edelgard von Hresvelg, the Imperial Princess of the Adrestian Empire…
…And she was being used, and treated, as little more than an anal cocksleeve. A tight hole to milk her teacher’s dick, and a sex toy to squeeze his shaft.
She loved it. Loved being used thusly, loved being employed thusly, loved being enjoyed thusly. Edelgard’s mind would have been afire at the memory, but in the moment, all she could do was adore it, and enjoy it, as she was anally ravaged, rawed into and rammed with all the force of a pent-up Professor plowing into his prize pupil.
Judging by the raggedness of his thrusts, and the tenuous throbbing of his balls, Edelgard knew that he was building to a finish, and building to it soon. She was panting, mewling, moaning whorishly and wantonly with need, and Byleth was digging his hands aggressively into her thick, fat asscheeks now, groping and fondling hungrily so that he could fondle and hold her at the same time. The blossoming heat in her core, and her cunt, was becoming too much to handle, too much to measure against the incessant intrusions of his dick inside her asshole, and there was a croaking, rattling quality to her growing groans as the feeling got closer.
As Byleth drove forward, messily smashing into Edelgard’s backside with the squelching sound of a butt being filled with far too much dick, it happened. It happened in tandem, eclipsing and presaging his peak by a mere moment, but it happened nonetheless. She came, and so did he.
A rush of heat and tension flowed into and then out of her, leaving Edelgard feeling aching and aflutter with welcome unease, a rolling, rollicking wave of buzzing pleasure tearing through her crotch and core, her mind and heart, in the best way possible. Edelgard climaxed with a sundered, surrendered series of stifled squeaks, recognizing—even unconsciously—the significance of cumming anal-only, and allowing it to add to her pleasure.
Just in time for Byleth to begin to empty his balls into Edelgard's ass.
He stopped thrusting, holding himself balls-deep inside Edelgard’s butt so that he could splatter her asshole full of cream, plastering the inside of her butt with bountiful bursts of spunk. He stuffed her guts full of cum from the wrong end, pouring his load into her as her thighs seized up and her eyes rolled in her head, lips flecking with drool as he flooded her with his eruption. Edelgard’s ass was pumped full of spunk, his nutsack twitching and throbbing against her thick buttcheeks as he filled her to the brim with his eruption, and every drop heavy and thick and hot so as to warm her from within, radiating heat and pleasant fullness.
The delight remained even after Byleth stopped blowing his load, his cockhead ceasing its seemingly never-ending splatters of cream inside Edelgard’s asshole. He had crammed her full of cum, stuffing Edelgard’s rear so full of spunk that she surely could not envision a time when she had not had her guts pumped full of cream from the wrong end, and the vacant, overwhelmed, drooling stare that she gave must have communicated that well.
Grunting, Byleth slowly began the agonizing process of dragging his dick from Edelgard’s tight, gripping asshole, the opening having acclimated to his cock and then some: now it was evidently reluctant to allow him escape, sucking down as he tried to withdraw, clutching at his cock as he got closer to pulling out. It was only with a yank of effort, and a rattling, weak moan from Edelgard, that Byleth managed to extricate his dick from Edelgard’s tight, cock-hungry asshole. As he did, it puckered and winked, slowly working itself closed as his spunk trickled from its overworked opening, and dripped down towards the stone floor.
Byleth gave Edelgard a once-over, perusing her exhausted form, her face sweaty, her hair wet and matted, her violet eyes still glazed, lips flecked with drool. Her pussy was puffy and wet from her anal-only orgasm, and her asshole was still oozing his cream as he nudged her further onto his desk so he could release her, but as he watched, and his dick stayed at half-mast, he had one more idea for what came next…and allowed a rare smile to grace his features, though Edelgard could not see it.
Edelgard mumbled deliriously as she was nudged to the side, and then felt something nudge her lips, her eyes watery and unfocused. It prodded her mouth again, and, unthinkingly, she let her jaw go even slacker, removing the last inhibition to its entry. A relieved, and satisfied, grunt rang out from above her, and as she blinked, and felt cognizance return to her—perception returning to her eyes, sensation slipping back into her lips, a twinge coming back to her nose—she saw what was coming a split-second before it happened. When she was too late to stop it.
Byleth’s dick, fresh from Edelgard’s asshole, slipped between her lips, just in time for her to taste it again. Taste the bitterness of her own ass on his cock, and the cum he’d pumped into her butt, and know that she was going ass-to-mouth without even being asked.
But she did not protest. She did not withdraw, or recoil, though the salty, bitter tang on the dick in her mouth was not exactly welcome, even to her addled senses. Edelgard did not retch, or reject it, even as Byleth pushed further in so that her tongue could not fail to pillow more of his length, and she could not fail to taste it all.
Because, truthfully, Edelgard could not have asked for more. Not have beseeched him for more. Now that she had been awoken to the amazing opportunities afforded by assfucking, Edelgard could hardly wait for the next time Byleth would bang her butt. She was still the Imperial Princess, and his devoted and dutiful student…but, privately, she knew that she would be Byleth’s anal whore, his personal butt slut and cocksleeve, forevermore. He would blow his load into her butt as often as he wished, and obliterate her mind, however temporarily, each and every time.
And Edelgard knew she would adore it.