Shirou Emiya x Rias Gremory

Attending classes at Kuoh academy was more of a distraction than a learning opportunity as far as Shirou Emiya was concerned. Sure his old school, in his old dimension back in Fuyuki could get hectic, especially with all the fanboys his ex flame Rin Tohsaka had dogging her tight and perky, bodacious ass.

But Kuoh Academy took things to utterly and stupidly ridiculous levels. First, there were the many girls on the same level of beauty or near as Rin, which generated even more horny fanboys , seriously they were so hot the boys couldn’t contain themselves and tided themselves by, by giving them stupid titles like ‘Great Onee-sama’s’ and other such silly things. The girls had the boys in a frenzy constantly, few of them actually focused on classes instead of ogling their bodies.

If that wasn’t bad enough, the girls could be just as bad. Mostly in regards to Kiba Yuuto, whom they referred to as ‘Prince’ because of his fine, effeminate bishounen looks. And to Shirou’s great distress, himself as well, with a few of them even openly salivating at the thought of ‘bl’ boys love between him and Kiba. The thought made him shudder.

But then things got even worse, when the ‘Perverted Trio’ were taken into account. They loudly and proudly declared their perverted desires, so much so that even during class, Shirou couldn’t get through one class in the last month without them disrupting it.  

Honestly, since ending up in this world, besides how utterly alien it and the magecraft of it were, the constant annoyances he dealt with throughout his school days were genuinely the most grating on his nerves. He would have counted the constant fights against stray devils and beating down his girlfriends former fiance quite annoying, but he could have done that handily even before Rias reincarnated him with her second mutated Bishop evil piece.

With them? Everything short of an ultimate class being was easily dealt with by traced mundane blades and his own not inconsiderable skills. It was to be expected, since he could content with servants with just his 27 badly atrophied magic circuits and human body. But with the upgrade into a devil body and each of his circuits evolving to the point where they could easily output as much mana as the average devil bishop, separately? Really, it was laughably easy to defeat every foe he’d come up against so far.

Shirou loosed a sigh, forcing his turbulent thoughts down and retaining control over the thousands of blades circling idly in the sky. Kanshou and Bakuya, usually C-ranked Noble Phantasms when he projected them, but in this world, solid B-ranks since there was no Gaia to force them out of existence. Including the fact that were was no Gaia, his projections took even less to make, and so projecting thousands of the married blades at once was easy, since he could easily get out five hundred or so back in his old world, with his shoddy magic circuits and Gaia pressing down upon him at all times.

Controlling them all beyond just shooting them off? Not quite as easy. Which was why he was spending time up on the roof of Kuoh Academy instead of in class, he could at least perfect his abilities instead of wasting his learning time.

He heard the roof door open and shut, but didn’t react. He knew who it was, he could smell her the moment she got within fifty feet of him. The slight smell of ozone, of destruction told him easily enough, the scent of her bloodline.

“Wow,” He heard her gasp, “I never get tired of seeing you do things like this, it really hits home just why even Riser Phenex was little more than a gnat to you in a fight.” Rias commented as she made her way over and draped herself over his back, soft, lithe arms wrapping around his neck and the incredibly bouncy sensation of her large breasts pressing into his back.

He almost snorted at the thought of Riser. For all his big talk about his bloodline, it hadn’t really done much to protect him against a few blessed black keys he’d copied off of Kotomine when he killed the smug evil bastard, really the Phenex should just count himself blessed that he didn’t pull out something nastier like Gae Bolg, Harpe or just went full overkill and pulled out the Excalibur of his beloved Saber. While he couldn’t fully copy it even in this world, he was infinitely closer to it by an order of magnitude than even Archer could have gotten back in his old world.

And considering at full power it could make quick work of even the White Titan, that said a lot about how absolutely bullshit his powers were.

Dismissing the countless blades above him with a thought, the sky lit up briefly with particles of magical energy and Shirou turned his attention to the busty redhead draped over him, her long curtain of crimson hair brushing against his cheek and tickling him slightly, “Weren’t you in class just a few minutes ago?” he asked. She was, he knew she was, he had literally saw her through her class window just five minutes or so ago, she’d even smile and waved at him.

Rias giggled, “I was,” she replied, moving in closer to whisper in his ear, her hot breath making a pleasurable tingle run down his spine, “But watching my extremely attractive and extremely manly boyfriend conjure such power made me remember when you saved me from my arranged marriage and you taking my virginity that very night – it made he all hot and horny, I just had to come see you.”

It was a battle for Shirou not to both sigh in exasperation and grin in pride. One, because he was very proud of his skills in the bedroom, perfected through experience with Saber, Rin, Sakura and Rider, all very different girls with all very different wants and desires even in the bedroom, and learning how to please all four of them until he left them exhausted and mewling beneath him made him near a master.

Granted, his Structural Grasping was absolutely bullshit at this point and he could even examine them and deduce when and where to pleasure them for maximum pleasure.

Second, was the fact that ever since he’d rocked Rias’ world, she’d turned into a bit of a nymphomaniac, there hadn’t been a night since he’d crushed Riser and fucked her out of her virginity that she hadn’t come back to him for a repeat.

Her hand reached around his abdomen, creeping closer to his groin, and she began to lay kiss after kiss up his neck, moaning softly, and almost wantonly in his ear. She even started to grin slightly on his back, pressing her big tits, hardening nipples and all harder and harder into his back.

Just before she could cup his groin in her slim, dainty hand, he caught it with one of his own and stood up, roughly pulling the horny redhead beauty around from his back and pushing her forward until she was bent over the railing of the roof.

It wasn’t going to be the only railing on the roof, that was for sure.

Shirou admired the busty redhead bent over before him, full, luscious thighs full in view, bouncy round ass clear for him to see, the tiny purple skirt of her uniform having ridden up over her thick, baby making hips. Rias moaned wantonly, looking over her shoulder at him with smouldering emerald green eyes, flipping her curtain of crimson red hair over her back, as if beckoning him to grab the majestic tresses and use them as a leash, her hips gyrated over the rail, bringing his eyes to her silky black lace panties, an even darker black at the camel toe of her puffy aroused pussy, damp with the laden moisture of her arousal.

Alongside the heedy scent of his girlfriends arousal, another scent tickled his nostrils. Another ozone like smell, although where Rias gave him the feeling of arousal, this one reminded him of the scent from a lightning strike.

Akeno. He had to withhold a smirk, she’d taken to spying on him and Rias during their intimate moments lately like a proper little voyeur. Honestly sometimes that girl reminded him of Rider, he beat she was just like the bodacious plum haired gorgon in bed as well. Acting all defiant, sultry and dominant but really yearning to be completely defeated by him and made into a submissive little slut.

Putting the busty queen of lightning to the back of his mind, he leathered a spank on one of Rias’ ass cheeks, marvelling as the rounded bouncy cheek bounced and rippled.

“Hyah!” Rias let loose a mewling moan as he spanked her.

“You little slut,” Shirou sneered lustfully, out of character for him, no matter how cynical the 5th Holy Grail War and it’s revelations about both himself and his family had made him, but very nice for some kinky sex, and Rias enjoyed it since it wasn’t actually real.

Well, actually it kind of was. She was a slut, but only for him. He was a bit of a man slut himself considering the amount of girlfriends he had – Saber, Rin, Sakura, Rider, even his older sister Ilya, first when she was stuck in a loli body and even in her fully developed twenty year old body when he and Rin helped her fix her body using liberal use of Avalon and Ilya’s innate wishcraft.

No wonder his dad fell in love with Ilya’s mother Irisviel, because Ilya’s body was a carbon copy of hers now that she was full grown and she was thicc as all hell, just as voluptuous as Rider, if bigger in the tits and a bit smaller in the ass, but with hips to utterly die for., and that snow white hair alongside her glittering ruby red eyes.

He felt his cock throb even harder in his school dress trousers, bulging out obscenely,

Fiddling with his belt, Shirou unclipped it and allowed his pants and boxers to pool around his ankles, his fat, massive, throbbing cock fell free, slapping between the cheeks of Rias’ fat badonkadonk, and hot dogging her.

Pulling her black lace panties to the side, exposing her puffy, wet pussy to the view of his golden eyes, Shirou pulled back his cock and lined up with her vagina with one hand and fisted his other hand through her gorgeous crimson red tresses like a leash, “Imagine a proud devil heiress of the Gremory House shaking her fat ass like a bitch in heat for a mere mid class devil, in public at that where anyone could look up and see you.”

Getting to take the mid class exams had been a reward granted to him by Sirzechs, the Satan Lucifer and Rias’ older brother for getting her out of her unwanted engagement. His goal was high class so that he could reincarnate his other girls, Saber, Rin, Sakura, Rider and Ilya and they could be together forever, more or less.  

Mostly because, as humans, Saber and Rider who were incarnated would live much, much longer than he, Rin, Sakura and Ilya. So for them all to be together, Shirou had decided to accept Rias’ offer to become her Bishop, both for the obscene power boost he gained from it, but mostly so he could be with his harem forever and leave none behind.

He’d learned a lot from Archer’s mistakes. While he’d always remain true to the nature of a hero, it was through Archer that he learned to prioritize those he loved beyond that of the desire to save people. What use was a machine like hero? They could save people, but they could never take away their tears with such hollow conviction.

Rias wiggled her hips, “Mmm,” she moaned in agreement, even with her head pulled back taut because of her hair leash, “I can’t help it, just thinking about you and your big cock makes me so hot and I can’t help but want all those boys who want me to look up and see you claiming me over and over again.”

That was enough for Shirou. Pulling on her hair, he yanked the busty devil heiress backwards and then thrust forward, spearing into her juicy wet pussy with the entirety of his big dick. Rias screamed as he pierced her, her crotch and lower stomach area bulging outwards obscenely.

Shirou relished in the feeling of being within the wet, warm and willing pussy of the devil heiress, enjoying the way she clamped down on him immediately and mewled, hips shaking as she orgasmed just from him inserting his thick cock into her.

She really was a little slut that couldn’t get enough of his cock. The way she moaned and breathed needily beneath him was in stark contrast to their relationship in the beginning where she was casually sultry and always seemed to be in control of herself. Truly, there was such a primal sense of victory whenever he saw the powerful, proud devil submit fully to him.

It was a feeling he’d cultivated with each girl of his harem, because each and everyone of them were obscenely powerful in their own ways. And all of them besides Sakura were extremely prideful on top of that.

“So big,” Rias moaned, eyes rolling up into the back of her head.

His hand now free from lining up his cock, Shirou reached undereath the busty redhead bent over before him, shivering and wiggling atop his cock and took a fist full of her school shirt, tearing it open savagely, buttons flying everywhere and exposing her massive, perky round tits clad only in a tiny black lace bra that they were absolutely spilling out of.

Sinking his hand into the expanse of her large, doughy boob, Shirou had to admire just for a moment how big and soft they were, it was like his hand sunk into the best pillow on earth, a pillow that not even Gilgamesh had within his legendary treasure vault, Rias’ tits were amazing, bigger than even Rider’s, with with a supernatural perk to them, and small bright pink nipples that were just so delicious looking.

It was times like these, Shirou could almost understand Issei Hyoudou’s sheer obsession with oppai. Because he could absolutely not stop himself from roughly groping her fat breast with a near reckless abandon.

With one hand tugging Rias head back by her lovely crimson hair as a leash, and his other hand greedily groping her tits, Shirou began to fuck her then.

“Aw gawd!” Rias slurred as he pulled back and then slammed his hips into her, spearing her once again on his manly rod a split moment later, the railing she was bent over groaned from the strength of his thrust.

Once, twice, three times he pulled back and thrust to build up his speed, and then he was off, railing Rias on the roof with a speed no human could ever hope to match, all the while he used his grip on her to work his Structural Grasping spell, finding every nook and cranny of her body, where to pull on her hair to give just enough pain that it crossed into pleasure, where to grope her oppai masterfully that would send any normal girl to orgasm in moments, and finally each and every spot of her pussy he needed to ravage with his cock to hit that high G note on every single pass.

Shirou grunted as Rias tightened on his cock, and then loosed, and tightened again, her pussy sloshing, fat round ass rippling and her moans piercing the air as she orgasmed, one time after another thanks to his insanely pleasurably assault on her slutty devil body.

“Fuck this pussy is so good!” Shirou growled lustfully, picking up his pace even more. The loud, wet slapping sounds of his crotch slapping against her juicy round ass echoed through the school grounds.

They were not being quiet at all.

Her pussy felt so warm, wet and just all around lovely wrapping around his cock, to the point where he could barely control himself, pulling back from her breast, his arm now no longer blocking them from view, and giving anyone who could be watching a perfect view of Rias’ big bouncy breasts flopping up and down wildly on her chest, her lovely designer black lace bra hanging like a decorative shelf beneath them.

Rearing his free hand back, he swung down and delivered a resounding spank to her ass that sent Rias squealing like a stuck pig, jiggling ass reddening where he struck and her cunt feeling like it was doing its absolute best to squeeze it till it came off.

“You like that don’t you?” Shirou sneered again, laying another spank on her ass, this time on the opposite bouncing butt cheek, drawing another lurid moan from the gorgeous heiress.

Rias’s wide open mouth closed slightly as she took a deep breath from her moaning, a groan of lusty pleasure rumbling in her lovely swan like throat, when she opened again to answer, she was but a moment too late as Shirou’s free hand darted around like Hrunting on a target, and he roughly inserted two of his thick, calloused fingers into her mouth, “Yessh! Shoo geewwd ♥ !” she squealed whorishly around his fingers, drool trailing down her chin, eyes rolled back and tongue sucking and lapping at his fingers in an almost crazed manner.

Pulling out of her mouth, Shirou grinned and let go of her hair, allowing her head to fall down slightly towards the railing as Rias lacked the strength to keep even her head held aloft due to the mind breaking pleasure being dick punched into her womb. Her great, plump tits squished whorishly through the railing graits,

Her head made a ding sound, falling in between her hands that were wrapped around the railing and gripping so tightly the metal had began to warp. Rias never trained for gains as far as physical strength went, but she was still a high class devil and her strength was while nowhere near the likes of an average rook, still superhuman.

Her whole body shivered back into his thrusts, her love and sheer desire for him combined with his godly skill in the pleasure arts forcing her through near continuous orgasms, and the sword incarnation moaned, “Damn Rias you take my cock so good!” Shirou groaned as her pussy convulsed even harder around him. His legs buckled slightly from the feedback he felt that ripped through his cock all the way down to tingle his balls, and he was quick to use both of his now free arms to grip her thick, childbearing hips tight enough to leave bruises.

“Take it, you bitch, take my fucking cock!” he grunted, picking up his pace even more thanks to his grip on her hips and fucking the older girl utterly savagely . “Oh, yeah. This is what a slutty devil like you enjoys, isn’t it? Nothing more than a slutty set of wholes for me to ravage as I please!”

His thrusts were ferocious, the echoing clap of skin on skin could probably be heard even in the classrooms at this point, and he was sure their observer who even now he knew was frigging her slutty half fallen angel cunt silly could both hear and see the utter delude of juices Rias sprayed out on each pass his cock made, soaking his uniform, her thighs and dripping into a deep wanton puddle of pussy juices on the concrete floor of the roof.

Rias squirmed and wiggled beneath him as he pounded into her, over and over again, panting, moaning and squealing huskily, bent over the railing for a good forty five minutes, by time Shirou felt his balls finally constricting as both his monstrous stamina and willpower finally gave out in him and he thrust into her with enough force that the railing snapped below Rias and she fell face first into the ground, big, bouncy round tits and face covered in drool, eyes rolled up into the back of her head and tongue twitching outside her mouth in a maddened, jibbering, fucked silly ahegao expression.

“Fucking shit! Get knocked up Rias!” Shirou cried out as he unleashed his own delude of sexual liquids, a great delude of bubbling, thick sperm that shot through his rod and painted her insides white. Her cunt made a loud squishing noise as it was filled to full capacity, Avalon doing its work and allowing him to regenerate the load of his balls at an absurd rate.

When he finished and pulled out a full two minutes later, Rias’ legs twitched in place for a few moments before falling to the ground, spread wide showing her utterly gaping cunt, frothing and overflowing with his cum, legs spasming up slightly every few seconds as the after shock of pleasure and phantom feeling of his cock within her cunt continuously ripped through her destroyed high class devil pussy and dragged her through miniature orgasms one after another.

Shirou admired his handy work with a proud smile as he took in the absolutely fucked stupid expression on his loving girlfriends face and the absolute wreck he’d made of her body with his cock.

Then his smile turned into a wolfish grin and he turned to the opening to the school building, where he could smell the familiar scent of Akeno, and the heavy scent of her arousal even from a good twenty feet away and through a door.

‘Now how should I go about punishing her?’ He mused thoughtfully.