A/N: Castoria is quite cute, so when I saw this bunny suit art fit for Halloween, I just had to include it~

Do enjoy~

Trick or Treat: Castoria Bunny Edition

Ritsuka had grown up enjoying Halloween quit a lot.

Be it when he was young it or when he was in his early teens, Halloween was one of his favourite holidays, second only to Christmas for obvious reasons. Halloween though had its own appeal; the spooky atmosphere, the candy and ritual to gain it, and of course dressing up in costumes and binging horror movies.

The reasons for his like of the season were many, and when it came time for him to serve at Chaldea his joys were put on-hold to deal with the various crises that afflicted the organisation. Now though, with things winding down for a change he found the time to organise something special, not just for him but for a couple dozen of his Servants; trick-or-tricking. In a public neighbourhood filled with regular humans.

Some might gawk at the idea, especially with Servants like Hercules and Vlad about, but with the season being what it was they fit right in. Couple the older-looking Servants with some of the younger ones and they could play it off as being a family or even just a minder keeping an eye on them. Naturally Ritsuka himself went along, dressed up in a suit-and-tie with a fake nail through his head, making him look like a classic Frankenstein, though he was mindful to get Frankenstein's permission first. She seemed... amused, if he was to put a word to it, judging by the slight hum and huff she made. She didn't dislike it, at least, which was good.

She went off on her own though. Not one for the whole trick-or-treating experience but preferring to wait for everyone in the nearby pumpkin patch, he assumed.

That was fine by him; he had someone else accompanying him anyway.

''Hm? Master, what is it?'' Said aforementioned companion piped up, nudging him with an elbow.

Ritsuka turned to look at her, a light smile on his lips as he laid eyes on Artoria Caster. The blonde Caster-class Servant peered up at him with those beautiful green eyes of hers, entrancing him with their innate charm. ''Nothing, just enjoying the atmosphere I guess.''

''Ah, fair enough.'' She dipped her head, glancing about. ''The street is a bit quiet though, isn't it?''

''I suppose? What, expecting some ghosts to come out?'' Ritsuka teased.

''W-Well, you never know, right...?'' Artoria blushed, averting her eyes.

Ritsuka though chuckled, his gaze falling from her face to her outfit. Gone was her usual attire in favour of a costume – a rather risqué costume she had to wear as a result of losing a bet with Euryale. A bunny-suit. She had a witch's broom in her right hand to sell it as a witch-bunny sort of costume, but in truth it was, plainly, just a bunny-suit. One that fitted her exceedingly well, the leotard pushing up and cupping her medium-sized breasts nicely whilst still leaving a fair bit of skin on display, only a small collar-piece around her neck whilst her shoulders were bereft of cloth. The pantyhose she wore though did wonders to make her legs look irresistible; her ass especially emphasised by the tight fabric, something Artoria herself was embarrassingly aware of.

Mercifully most of the trick-or-treaters they'd encountered were kids so they didn't spare Artoria more than a glance, too busy gorging themselves on chocolates and sweets to care. The adults following them though did let their eyes linger, but with his arm around her they didn't try anything, not that he thought they would. Still, one could never be too careful, especially since Artoria could probably blow them across town with an accidental exertion of strength.

Ritsuka dispelled such thoughts though and opted to instead snake his arm around Artoria's slim waist. The bunny-girl squeaked, face flushing when she spied his cheeky smile and prompting the Caster to look away, flustered. He responded by pecking her on the cheek, further darkening her blush. Such affection wasn't new between them but he always loved how easy it was to fluster her, especially given she had been in battles and fought for her life at times – yet a kiss was enough to make her flustered and stammer. It was so indescribably charming he couldn't help himself.

Distance laughter drew his eyes ahead to a couple of kids crossing the street. This late it was dark out, cones of light emanating from the street-lights and illuminating the scattered autumn leaves that splayed across the road and pavements. The road to their left had plenty of cars parked but scarcely one driving, whilst to their right was a pitch-black park, the trees tall and quietly swaying in the breeze. Someone had the bright idea to decorate the metal fence lining the park; planting cut-out ghosts, bats and spiders all over them.

As they neared the open entrance to the park though he noted the gravel pathway into it was lit by jack-o'-lanterns, the orange glow illuminating the pathway. ''Hm... wanna go through here? Looks pretty neat.''

''Ah? Sure, I guess...'' Artoria demurely agreed.

Up until he teasingly add; ''Plus less people will see you in that outfit.''

''Yep, going now!'' Artoria declared, all but dragging him inside.

Ritsuka laughed lightly and caught up with her, the pair of them jogging partway into the park before slowing back down to a calm walking pace. Without any street-lights within the park path the was only area that was illuminated; beyond it was just pitch-black forest. There was something equal parts eerie and enthralling about the dark though, a sentiment only tentatively shared by Artoria herself as she stuck close to him, spying the darkness with worry.

He resisted the urge to tease her though, opting instead to tug on her side. Artoria looked up at him and blushed, understanding the subtle suggestion – and with a demure dip of her chin she agreed, following him as he led her off of the beaten path and into the woods. They didn't stray far for fear of losing what little light they had available; thus opting to hide behind a tree not two dozen feet from the path, out-of-sight of any passersby but not from the light.

And the moment they were out of sight Ritsuka pushed his Servant up against a tree, kissing her.

''Mmph-?!'' Artoria's eyes widened, startled.

For all of a few seconds. Her eyelashes soon fluttered and a light moan fluttered out of her throat as she reciprocated, lips mashing up against his own as she wound one arm around his nape, pulling him deeper into the kiss. Ritsuka gladly did so, his left hand on the tree whilst his right playfully slid up her side, caressing it... before pulling down the cup of her leotard. Instantly Artoria squeaked and he pulled back from her lips, flashing her a cheeky grin – right before darting down and taking her nipple into his mouth.

The Caster-class Servant very nearly moaned in surprise; stifling the sound just in time with a hand. Nevertheless Ritsuka continued to suck on her tit, his tongue drawing sensual laps around the nipple before his lips popped off and grazed further up, laying kisses up her tit until he swapped over to the other, tugging the other leotard cup down in the process. Artoria didn't even try to stop him, her whimpers audible through her muffling palm whilst her other held onto her broom for dear life.

Until she forsook said broom; holding onto his head with both hands. Her fingers weaved through his hair and he hummed in response, giving her tit a quick suck before rising back up to his full height. Artoria barely drew a breath before his lips mashed against hers; a deep mewl reverberating out from the back of her throat as he grabbed her ass with both hands, kneading her curvy rear through her pantyhose.

''Mn... Master...'' Artoria breathed against his lips, shivering. ''L-Let me...''

Without another word Artoria hurriedly knelt down before him, fingers working on his belt and loosening the zipper – and she squeaked when his cock sprung out, already erect. She shot him a chastising look but Ritsuka just grinned sheepishly, earning an exasperated sigh from the blonde Caster. She overcame such exasperation quickly though, her right hand coming up and stroking his cock slowly, eyes glued to his shaft despite her evident embarrassment,

Her tentative strokes steadily became more confident, and with that confidence came courage; her fingers fully enveloping his shaft as she held it firmly. Jerking him from tip to base she dared to take it a step further and licked at the tip, eliciting a quiet grunt from Ritsuka that evolved into a gasp when she took the tip between her lips, sucking on it shyly even as her hand kept jerking him off at a hurried pace.

''That's it...'' Ritsuka breathed out, looking about to make sure nobody was around to see this. ''We're good, keep going...''

Artoria gladly did so; her tongue lashing at the tip of his dick more avidly. Though still shy about it this wasn't her first time giving a blowjob and it showed; her tongue moving with experience as it flicked and slithered about the tip. Then when he least expected it she shifted her hand further down and took him deeper into her mouth, humming around his girth as she sucked up to the tip and plunged back down, accepting more and more of his cock between her lips.

The sensation of those slim pink lips grazing along his cock, her sucks gentle but earnest, sent shivers racing through Ritsuka. The young man pursed his lips and held back his moans as best as he was able but they still leaked out in the forms of grunts or groans, his eyes screwing shut tightly as if to help endure the pleasurable hotness of Artoria's mouth. If anything that seemed to motivate Artoria into sucking him off more; her lips gliding along his erection as she blew him with such earnestness.

Ritsuka exhaled, leaning back and caressing her head; his fingers running through her hair as she settled her fingers near the base. As she sucked up his cock her fingers rose and as she took him back into her mouth they fell, leaving not a speck of his cock unattended. The gentle sucks became stronger and more lustful, the spit turning them into sloppy slurps that left him weak in the knees, such was the sensual warmth of her mouth.

Mercifully Artoria pulled back before he came, panting and wiping her chin dry, before hurriedly the Caster stumbled to her feet. Her face burned red and she refused to meet his eyes, too embarrassed to, but with a meek shuffle she turned away and laid her palms on the tree before her; sticking her ass out towards him with intent.

''Master, please...'' Artoria demurely pleaded, swaying her ass.

Ritsuka shuddered at her submissive expression, undeniably turned on. Without deigning to answer verbally he grabbed the back of her pantyhose and roughly ripped a hole in it, eliciting a soft gasp from his partner before it melted into a shy whimper, her protests nil. Nor did she protest when he pulled her leotard to one side, his dick-tip bopping her ass before he guided himself into position, parting her folds, sliding in-

And then as one they groaned as he penetrated her. As always he was gentle but there was no ignoring the rush of pleasure that filled his being as he slid steadily between Artoria's petals, her moist heat welcoming him in little by little until just over half of him was inside of her. Without missing a beat he drew back, her folds grazing his girth as he exited only to swiftly drive himself back into her, groaning through gritted teeth as he pushed deeper than before.

Settling his hands on her hips Ritsuka pumped into her, huffing and puffing as he slid into her. His palms were quick to wander though, travelling first to her ass and groping it before sliding up to her nicely-shaped tits and groping them, eliciting a whine out of his partner. One that tempted him to kiss her on the cheek, luring her gaze his way and enabling him to claim her lips in an over-the-counter kiss, her whine muffled by their locked lips.

''Master~'' Artoria whined pitiably.

Something that earned a chuckle from Ritsuka, his lips drawing away from hers only to peck her on the cheek. The blonde Caster blushed at the affectionate peck but anything she wanted to say melted into a moan as he drove his cock into her, hilting his manhood into her deepest parts as they were finally, fully connected. However he didn't stop, didn't slow – quite the opposite. The slick embrace of her loins fired him up and his thrusts only hastened further, pump after pump driving his dick deep inside of her and clapping her ass in the process.

Artoria did her best to be quiet but when he was pounding her from behind, his tip kissing her innermost parts and his body pressing hers up against the tree, her bare breasts brushing against the bark, she couldn't. Stifled whimpers and burgeoning cries fled her throat but didn't reach any ears beyond his own – nor did the harsh slap of flesh earn any attention, only the two of them in range as he pounded her drooling pussy with excited thrusts, his shaft slick with her nectar as he stirred her insides up.

''Hnf, Artoria...'' Ritsuka breathed into her nape, kissing it blindly. ''You're so cute in this outfit, you know...? So sexy too...''

''M-Master, don't say that~'' Artoria whined back.

But the way her loins tightened around him, squeezing his cock possessively, told of her secret enjoyment. Shivering Ritsuka responded to with words but action – namely slamming in even harder, devoting all of his energy to fucking the bunny-girl in front of him. A girlish squeak escaped her first and a trembling moan second, her lips pursing but failing to hide her moans as he pounded her from behind, every potent thrust jerking her body forwards before she pushed herself back onto his cock.

Spooning her Ritsuka kept up the rapid tempo, his left hand laying over hers and pinning it to the tree whilst his right went down to grab at her ass more, unable to get enough of her attractive rear. As if reading his mind Artoria whimpered but kept shoving herself back into his crotch, the friction accelerating them to their ends, gasps escaping them both as they furiously made love in a public park-!

-until with a hand over her mouth Artoria climaxed, squealing into it as she gushed around his cock. The sharpness of her orgasm made her legs buckle and nearly give out – Ritsuka not a step behind, slamming into her tightening cunt and delivering a creampie that overstuffed her in an instant. Artoria whined, clutching onto the tree for dear life as his excessively-plentiful nut spilled out of her folds and down her legs, staining her pantyhose on the way and marring it with Ritsuka's lurid scent.

''A-Ahhn~'' Artoria mewled deliriously, slumping against the tree. ''Master, you came so m-much~''

Ritsuka slowly pulled out and made to reply – but before he could he heard voices. Artoria did too; the pair of them tensing in surprise as the female voices neared the park, both of them possibly visible from their spot – prompting Ritsuka to grab Artoria and pull her to the floor.

The yelp that nearly escaped her was muffled by a hand over her mouth, keeping both of them quiet as they waited for the familiar-sounding girls to pass... but, of course, they decided to stand and chat just beyond the wall. Laid on the forest floor as they were the both of them were nigh invisible to the girls, who Ritsuka recognised as Elizabeth Bathory and Mecha Eli-chan, however it also left Ritsuka in an awkward position. Namely, laid right on top of his lover.

Something Artoria was acutely aware of; her cute, burning-red face looking up at him as he laid with her, his dick throbbing against her groin and still so very erect. The excitement of nearly being caught made it impossible to go soft and he couldn't just leave things here, and waiting too long would risk him going soft... tempting Ritsuka to reach down. Artoria understood and shook her head, eyes widening in alarm, but Ritsuka guided his cock to her opening-

-and it took all they had to stay silent as he sunk back into her drooling pussy once more.

A near-violent shudder roiled through Ritsuka as he sunk balls-deep inside of his lover, his hands finding hers and holding them down. Swiftly he drew back only to plunge back inside an instant later; rational thought taking a backseat while primal instinct took control. An instinct that compelled him to slam in again, then again and again, pounding Artoria into the dirt as she moaned into her hand, the muffled noises subtle but perhaps not subtle enough for the girls on the other since of the wall.

But he didn't care. He was balls deep in Artoria's pussy and that was all he cared about anymore, panting as he slammed up into her quivering tightness and earned breathless gasps in return; her thighs pressing firmly into his hips and her ankles soon locking behind his ass, forcing his thrusts to shorten yet hasten. The quickening tempo made it even harder to hide but mercifully the two female Servants had begun to walk off, chatting between themselves about costumes or something.

In truth he wasn't listening. He was too busy going balls-deep in Artoria to care.

''M-Mnn~!'' The aforementioned Caster held onto him, thighs flush against his sides. ''M-Master...!''

''S-Ssh...!'' Ritsuka shakily hissed out; struggling to make the noise between gruff grunts. ''Hah, crap, might... cum soon...!''

Any other time he might've been embarrassed about cumming so quickly, but after the amazing blowjob and wild bent-over fuck they just had? He had no shame and simply devoted himself to pounding Artoria to his end, his body crashing down onto hers and sheathing his swollen, throbbing cock deep inside of her seizing pussy, her nectar coating his cock in a gleaming sheen in the brief moments before he buried himself deep within her once more.

The short claps of flesh were no doubt noticed but he ignored it, his breath bundling in his throat and his mind steadily purged of all thought. He darted down practically on impulse and stole a kiss, then another and another, losing himself in the beautiful slimness of her lips, tasting them and coaxing all sorts of whines and moans out of his lover, her insides possessively squeezing him, begging for his creamy filling.

The thought sent a shudder through him, tipping the scales – and pushing him over the edge.

''H-Haah, crap, Artoria-!''

He spoke not a word more before he peaked, pleasure rushing through his system – and he moaned as he released his seed inside of Artoria. Her leg-lock tightened as she came with him, crying out into a hand as his seed overfilled her womb and spilled out around his pulsating cock; every strong throb preluding another gout of semen he spurted into her. He pressed into her as he came, delivering his seed and stirring her insides about, his cock churning her up with every subtle hip motion.

For a small eternity they remained paired like that, loins together and breathing stilted – until with a breathy groan Ritsuka relaxed, slumping slightly and supporting himself on his hands. Moments later he rocked his his back and managed to pull out, his steadily-softening cock dripping white onto the grass under it.

''Haah... mn, Master...'' Artoria breathed out, shivering. ''It's so hot inside of me...''

''Artoria...'' Ritsuka breathed, leaning in for a kiss.

All whilst, unbeknownst to the couple, Elizabeth Bathory and Mecha Eli-chan walked off with flat expressions.

''...they do know Servants have enhanced hearing, right?'' Elizabeth deadpanned.

''...clearly not.'' Her mechanical companion replied, equally as flatly.

Extra blackmail material for them, if nothing else.

[END]