Lay Thy Head a Little (Fate/Stay Night)

Summary: Ever since Emiya Shirou found an unconscious woman near the Ryuudo Temple, his life has just turned a full one-eighty. Holy Grail War, Heroic Spirits that want to kill him, and Tohsaka Rin being the Master of said Holy Grail War. Caster had helped him immensely in the weeks that she's been his Servant, from teaching him Magecraft (proper ones, she said) to patrolling the Fuyuki City to make sure that nobody else gets hurt by the War. But sharing a roof with a beautiful woman like the Witch of Betrayal makes for passions to flare up... and they've only gotten more intimate in the days that they've been Master and Servant.

Fandom: Nasuverse | Fate/Stay Night

Tags: Porn With Plot, Fluff and Smut, Consensual Sex, Older Woman/Younger Man, Foreplay, Fingerfucking, Kissing, Rough Sex, Oral Sex, Vaginal Sex, Master/Pet, Established Relationship, Blow Jobs, Creampie, Maledom/Femsub, Bathing/Washing, Bath Sex, Multiple Orgasms, Multiple Sex Positions.

Characters: Emiya Shirou, Medea | Caster.

<>

Emiya Shirou woke up with a jolt. His back was sweaty and his heart was beating hard inside his chest. He blinked his eyes, trying to ascertain that yes, this is his room. Yes, he is still alive. And yes, the pain that is burning across his spine is most certainly not his hallucination.

"Ouch... Damn, Caster. She didn't hold back one bit," he groused.

The redhead carefully propped himself up into a seating position, making great pains to not agitate his back. His neck felt like it was cast in gypsum, and almost like a breaking damn, all of his body malaise has taken great pains to make themselves known as well. From his head to his feet.

But what or who was it that caused such pain towards the young man?

"Oh my, Master, you've woken up?"

Speak of the devil...

Golden eyes gazed upwards to see the source of the voice. Blue orbs of oceanic lustre greeted him, her complexion was fair, her long blue hair draped across her back, and the smile that she gave him was warm. Were it not for the fact that she was wearing common clothes, Shirou would've thought that she was a sea nymph coming here to seduce him. Her elfin ears, pointed and very pointedly not human did not help matters.

"Ah, sensei? Yeah, I'm up..." he responded.

The beautiful woman eyed him for a bit before crouching to meet his gaze at eye level. The rustling of her clothes and the floral scent of her perfume stimulates his senses, unlike anything in this world. Her smile turns chiding as her hands glide forward to tap him on his nose.

"We're not learning Magecraft, boy. Remember to call me Caster," she corrected.

Such a casual act of affection would've sent him a few weeks ago to a blubbering stupor, but now he's way too tired and in pain to act in any way that would embarrass him (she loves to watch him humiliating himself like that). Shirou sighed and nodded, "Yes, I apologize, Caster. Would you like to have your breakfast?" he asked.

Caster's expression doesn't change much, it's not like her to be expressive at all, but the sparks in her eyes are very noticeable as she heard the word breakfast. "I would appreciate it if you do, yes. I have heated the stock, as you have taught me," she said. Her hands turned from tapping the young man on the nose to help him stand up on his own two feet.

Which is a bad idea because...

"Oww—, Caster, I'm still sore,"

Sharp sparks of pain lanced straight to his brain, Shirou's hands clutched Caster's own as she tried to balance herself and the teenager from toppling over. He closed his eyes in pain, his limbs felt like wet noodles and he could barely make out that he was shivering. Caster looked worried for but a second before a small incantation resounded from her mouth.

The effect was instantaneous, all of his previous agony and fatigue disappeared immediately. His body doesn't feel like a barely crumbling wet paper anymore. Whatever spell that she worked on has alleviated him from the pain that was plaguing his body.

"Are you alright, Master?" she asked me in a serious voice. Shirou could barely sound out a response before she laid him very carefully across the futon, making sure that the young man was positioned to lay on his front. Her hands found the hem of his shirt, slowly and carefully hoisting it up to reveal his back to the open air.

The feeling of the warm sun and crisp air meeting his white patches ridden back was uncomfortable. But this is nothing compared to the first time they've tried this or the previous mean where he tried to 'train' his Magecraft. Shirou heaved a sigh of relief and said, "I'm okay, Caster. Just got a bit winded, that's all,"

She humphed, "I am glad that you could still make light of any annoyances coming your way," as she put her hands unto some of the white patches. And then—

"κεραυνός," she intoned.

Suddenly, bright aquamarine light illuminates his back, crisscrossing over each other under the white sticking patches. Alight with Prana, the white patches revealed words of a dead language, each word beyond the comprehension of even the most knowledgable expert of Mediterranean Magecraft. Shirou himself doesn't know much about the languages or the words themselves, but he knew that they're part of a healing spell that promotes growth and healing.

"You have improved, almost all of the deviations in your Magic Circuits have been repaired," she said analytically, almost looking like someone busy cutting the entrails of animals in order to divine the future rather than the beautiful yet mischievous older woman that she appeared before. "...thankfully, whatever numbskull aftereffects that you so idiotically burnt across your Circuits won't impede you from casting Magecraft. Keep this up and I might consider you adequate for the standards of modern Magi,"

"Thank you for your teaching," he said, responding to her acerbic and harsh words.

"Hmm, but not enough that I will consider this 'good enough'. Boy, to the bath." she said sternly.

"Again?!" Shirou protested, his cheeks fully flushed with embarrassment and trepidation.

She looked particularly annoyed at his response. "I thought I had knocked out whatever shame that you have left this past week. It seems I might have to repeat your lessons before..." she muttered hauntingly. But then her eyes focussed back, Caster clapped her hands twice and pulled Shirou to his feet. She grabbed ahold of his arms as she led him towards the bath.

"W-Wait, Caster. The breakfast. The stock is probably burning by now...!"

"No need to fret, Master," she said, undeterred from her personal crusade. "I have memorized the steps that you have instructed me, it is trivial to replicate the same movements using a few tricks of mine," she laughed.

The image of a Dragon Toothed warrior making miso soup and roasting fish shouldn't have caused him this level of fear, but he dreaded the outcome anyway.

They arrived in front of the baths. Caster stepped inside locked the door behind them and finally let go of his arm for the first time since she's manhandled him to the bath.

"Well, then. Strip,"

"...Caster—" Whatever response would've been mouthed off by Emiya Shirou is halted as the older woman placed her fingers on his mouth.

"Master, you have seen me nude more times than there are days since we have met. And I can assure you there will be more in the coming future. So please... take off your clothes," she commanded him.

Unwilling to argue with his headstrong Servant, Shirou sighed despondently before turning away from her. He put his arms underneath his shirt and pulled up, revealing all of the white sticking patches, bandaids and other bandages that are covering his body now that they're no longer hidden by his shirt. He looked at her, almost asking her to look away.

But look away, Caster did not. "Master... you're adorable, but you're not being cute right now. Take off your pants,"

Realizing that there was no escape from this situation, Shirou gave in fully. With halting hands he placed his palms against his pants, seeing no further reason to prolong this voyeuristic gaze from his Servant, he quickly pulled it downwards. He bent down, trying hard not to think of the older woman before him of eyeing his body, and grabbed his discarded clothes before dumping them to the clothing rack.

Caster nodded, "Better, now get in the bath. The water is running cold,"

Since when did she even prepare the bath? Such thoughts resound throughout Emiya Shirou's head as he opened the door towards the inner room, the brown interior of the bath looked pleasing to the eye and steam was wafting throughout the room. A wooden seat in the middle of the room right next to the bath looks waiting for him to sit on it to clean himself.

"Now then, sit down boy." Caster said behind him, shower head in hand.

"Since when did you undress?!" he asked surprisedly. Because she, indeed, had undressed and was now standing with only a towel to cover her privates. Also, he did not remember ever having such a skimpy and low-covering towel in his life!

"Hmm? You were staring off in the distance long enough for me to disrobe. Now, enough daydreaming and sit!" she said, leaving no room for arguments. Shirou hung his head low and sat down on the stool. He heard a splashing sound behind him, the sound of a showerhead being turned on. Then water was sprayed on his back, streams of cool water washing off his grime, sweat and also cooling his body.

He could not see behind him, but he could feel hands touching his shoulder to make sure that no inch went unwashed from her careful ministration. The silence in the room was suffocating, and the air made it somewhat hard to see.

"Your Circuits were running hot again,"

"Hmm," he hummed in ascent.

"They need to be cooled, the patches and bandages need replacing. Did you get stares in school?" she asked, trying to make small talk.

"Well... before the first Physical Education lesson where I need to change my clothes, nobody seems to pay me any mind. Now..." he pursed his lips. Trying to tell her this feels embarrassing.

"Well? I won't know the answer unless you tell me."

'That is a lie and you know it!' he thought. There is absolutely no way that someone of Caster's calibre and personality won't try to cast some sort of surveillance spell where she can see everything that is going on inside the school. Especially with Tohsaka Rin being a Master within Homurahara High School.

",,,they say that Taiga chewed me out in some sort of a primitive display of affection or something. That, or domestic violence. I'm not sure." he answered with a disbelieving voice.

Caster laughed at the answer. Her voice is very beautiful, her face is beautiful, and her body is... also very beautiful. Shirou tried to squish his legs together to make sure that she wouldn't notice the blood rushing downwards.

Seemingly unknowing of his plight, Caster made a nondescript humming and spoke once more, "I am going to take off your bandages."

Shirou nodded, her hands sliding across his back, ripping and tearing the patches and bandages that crossed his back and torso. Dainty fingers worked tirelessly and methodically, leaving no room for errors as she cut down the spells that held these affixed to his skin. Shirou has long grown used to this, the process of waking up, of removing and applying his bandages, of going to school, coming home and learning Magecraft under her tutelage, before starting all over again.

As the last of the bandages fell out, they dissolved into nothing and Shirou waited for her to re-apply the new one.

Only, she doesn't... Instead, he felt her arms reaching underneath his armpits to envelop him in a hug. He also felt her towel-clad breasts pressing him on the back. He felt his cheeks flushed but said nothing. Because nothing needs to be said. He reached his hand to caress hers.

"You've done such a wonderful job," he starts. She doesn't respond to his words at first, but he already understands the 'game' that they are playing. So he pressed forward. "You're so powerful, talented and beautiful. I wouldn't know what I would do without you."

"Dead, most likely. That or cursed with an unremarkable life, for not having such a remarkable teacher," she mouthed off to his back.

Shirou laughed amusedly, he looked back towards her and she got the message immediately. They rose up from their spot, and before she could get her bearings Shirou snatched her from her feet. She let out a small squeak at the sudden movement, her arms hugging the neck of her Master. Her eyes narrowed at him as she made a not-so-amused face. Shirou laughed at the spectacle.

Now that he's bridal-carrying Caster, Shirou walked up to the bath. He put one foot after the other inside the bathtub, pushing water over the brim as two people reclined inside the tub. He tried to move around to ensure he got Caster and himself comfortable. Once they did, the water stopped flowing over and they luxuriated in the feeling of warm water on their skin.

Shirou heard Caster sigh and he looked down. Caster is splayed out before him, the fog barely covering her beautiful towel-covered body from his eyes. Before he could say anything, Caster looked back at him. Her eyes expected him to do something, to say anything.

"...come here and let me get those out of you," he said. She nodded and put her arms up, he reached out and started to disrobe her with his hands. He started from the top, slipping the fabric fold to unloose and from his motion, her fulsome C-cup breasts spilt out. Caster's perky nipple is light pink in colour, almost the same colour as her flushed cheek. His hands continued unravelling her towels, pushing past her breasts to her stomach and landing on her waist. He could hear her breaths speed up.

Shirou finally undone her towel, pulling the water-soaked cloth aside. Now that she is as bereft of clothing as he is, he can finally admire her enchanting beauty. From her nape, and collarbone, her perky breasts, her messy hair that tickled his chest, her slender waistline, her trimmed pubic hair, and her legs that she drew close. His previous assessment of her as a siren has not left his mind, rather, this has only reinforced it. Caste is incredibly beautiful.

"...stop ogling me," she muttered.

Shirou gulped, he can't help it. Caster was just a bit too much, she stimulated all of his senses in all the right way. Now, it's up to him to return the favour.

"You can let go, now," he said. Caster blinked, she looked up at him, bit her lips and nodded. Her muscles immediately loosen, whatever tension she's got under her shoulders is lifted immediately, and she reclines even further against him. Shirou immediately went to work, his hands tentatively cupping her breasts. He massaged her C-cup tits, pushing inwards and outwards, playing with them around with the funbags like they were stress balls. Caster moaned at the motions, she bit her fingers to deafen her voice from echoing in the bathroom.

One of his hands left her breasts, a motion that caused her to look down where his hands went, only to see that it was trailing downwards towards her crotch. Once his finger reached her lower lips, he put his index fingers to her clitoris. She shrieked at the sensation. Shirou continued flicking the little nubs with his index fingers, making sure that he stimulated it in ways that her body would respond. Caster puts her arms against his, her body twisting and turning as she is assaulted on two fronts.

"A-Ah, don't tease me, damn you..." she mewled.

"Sssh, a good Servant shouldn't talk back to her Master," he chides.

Caster fell silent at the reprimand. Her cheeks flushed like mad and her mouth pursed. She stopped trying to move around and instead lay trembling against him. But her pleas are heard, because once she's calmed down, he carefully poked at her entrance with his ring fingers. Caster moaned at the sensation, the ring finger continuing its advance inside her walls. Once settled in, his middle finger joined in to fill her.

Caster gritted her teeth, her eyes fully closed. Masturbation isn't something uncommon to her, but the feeling of someone taking charge in pleasuring her body is never something that she'll get used to in the future. The lack of authority over her body and the dominating movement of her Master tingles a place in her brain that she never thought existed.

Then, Shirou started to move his hands inside her. His movement made a schlicking noise as he pushed in and out of her. She felt tight around him, her hips rose up and down trying its hardest not to just meet his movement. Caster breathed out, deep and with gritted teeth. Her hand gripped his to hasten the movement even more.

She is close, they both realized. Caster felt a tinge of embarrassment on her cheeks but Shirou only quickened the motion with his hands. But this time, he made sure to stimulate her nipple by lightly pinching it. Caster opened her eyes and made a surprised noise. Seeing his chance, Emiya Shirou dove down to meet his lips against her. Incapable of withstanding 3 assaults on her mouth, tits and pussy, with a voiceless scream Caster came.

Her legs arched upward, a jet of clear liquid shot out of her pussy. She mumbled unintelligible words inside his mouth and her hand clamped tightly against his offending limb that is still continuing to vibrate inside her sex.

Eventually, she limped back down, their mouth stopped sucking air out of each other, and she shivered against his chest. Her breaths were uneven, her eyes half-lidded and she looked upwards at him with no intellect behind her eyes, almost like it was fried with pleasure.

Shirou found the whole sight hot and could not contain it any longer. He rose just a little bit to lift his hips over her head. And thwacked against Caster's forehead was Shirou's hardened cock.

"Open your mouth," he said. Noticing the rough command from her Master, Caster blushed and nodded. She put her arms behind her as she raised her upper body in a reverse-plank position. She opened her mouth for him to see. Her tongue was wet with want and desire, lolling out of her mouth as it tried to reach the cock hovering above her.

Shirou let out a breathy sigh as he positioned his wet cock towards her lips. The feeling of Caster's soft plump lips meeting his cockhead is still something he couldn't get used to. Her tongue drags itself across the crown of his cock to the centre of his length. The ministration is unbearable to him, so once he puts his hands on her neck he slides inside.

Caster's eyes rolled back inside her hand, the cock was slowly yet surely invading her mouth with each inch it took. The hot temperature of her throat-pussy melting the cock with unbound pleasure. Shirou continued to slide in, filling her throat with more inches of his fuckmeat until he reached the back of her throat. The bulge of his penis appearing visibly underneath his tight grip sparks a certain primal emotion inside his brain.

Shirou snapped and rammed the full length of his cock inside of her, knocking all of Caster's air. Shirou drew back his hips and rammed it forward again. He did so until there was a consistent clapping of lips meeting his crotch. Caster's nose and eyes were repeatedly hit with his pendulous ballsack. The scent of musk combined with fragrant soap lances straight to her senses, discarding away any previous thought.

But it would be unbecoming of her to simply let her Master slake off his lust off her, as a dutiful pocket-pussy she must make sure that he is properly serviced. Her mouth is the vessel for her to draw out the semen from men, yet it is also the means for her to cast her spells, Magecraft that came from the Age of Gods nearly equal to the divine miracles that they wrought. And loathsome though Aphrodite is, it is undeniable that she taught her many tricks that would satisfy any man she bed.

"κακοθερής," she mumbled. Her mouth and throat may be filled to the brim with cocks and drenched with saliva and cum, yet it impedes her incantation of High-Speed Divine Words none in the slightest. The effect is instantaneous and apparent; Shirou's eyes spark purple and his entire muscles tighten — especially the one that he's using to hold her throat.

Caster choked, the previous pressure that wouldn't so much as able to harm her now is intense enough that it could bruise her neck. His hip movement changed from the steady pounding that it once was to a more hurried and forceful motion. She felt his cock dragging from her throat into her tongue... and rammed straight into her throat once more. Her tongue also lavishly coats the moving cock, feeling the ribs and contours of his member as It tried to fill her throat.

And fill it did.

Shirou gripped Caster's throat tight as he descended into the water, drowning Caster under him. Caster sputtered, water now filling her lungs as her throat is currently flooded with his thick, frothy cum. Caster's limbs fell behind her, now incapable of supporting her as Shirou pushed her down with his weight, her head clamped between his legs and her hands about her throat.

He pushed forward, trying to extract as much cum from his balls as he could. His balls rested above her nose, blocking the air from entering her lungs. She couldn't even open her mouth, because it would mean letting any of his delicious and salty cum from escaping from her throat. Truthfully speaking, were Caster any other mortal woman, she would die drowning from the asphyxiation that her Master in his lust-ridden state is doing.

Fortunately, Caster is a Servant, a Ghost Liner that needs no sleep, food, or air to keep on living. So whilst she's currently being drowned with cum and water, she won't die even if she were to be submerged for a full day unto the bottom of the sea.

After a few minutes of ejaculation and submerging inside the bathtub, Shirou rose up, dragging Caster with him. Her limbs hung limply behind her, her head felt dizzy for being without air for so long but nothing life-threatening to her, and her mouth continued acting as a vacuum seal to the obscene amount of cum that is resting inside her belly.

She couldn't see above her, but she felt her Master dragging his cock out of her mouth. The motion caused some jerks and shivering coming from him, and once he pulled his cock out of her mouth-pussy, he placed it right above her eyes. Caster needs no sight to hear and feel her Master currently heaving deep lust-ridden breaths.

That previous spell might have been a bad idea on her part. But Caster's brain is way too pleasure-addled to think of any other thoughts, so she voiced out, "Please... fuck me more, Master~"

The next thing she knew is that he has thrust his cum-slicked cock deep inside her pussy. She purred from the rough act. She felt his hands cupping her breasts, tugging and pulling at her nipples. His mouth has closed into her now bruised neck, licking the purple welts with his tongue.

Caster smiled with pleasure. There is no thought behind her head, there is no iota of civility or decorum. What she and her Master are doing is no longer able to be called sex. No, they are rutting. Her cock wanted to pump his seed inside her womb, to make her pregnant, to want her to raise his child as he pumped her full of cum. How primitively depraved!

She loved every notion of it.

Once she felt comfortable with his member resting inside her pussy, Caster lifted her hips, dragging her inner walls against his cock. Both Master and Servant gritted with want, the warm depth of Caster's pussy clamped tightly unto the magma-hot cock of Emiya Shirou. And as she reached the top of Shirou's crown, she descended down with a loud plap.

Caster's cheeks met Shirou's lap, and she rose up to descent again. Shirou was not idle, he made sure to synchronize her movement with his own. The two, a teacher and a student, were still not sure what to make of their relationship. The Hero with the Infinite Swords and the Witch of Betrayal. Separated by eras, age and magical prowess. Forced to fight in a battle royale where the victor has their wish granted by the omnipotent wish-granting Holy Grail. These two could not be any different from the other.

Yet today, none of that matters. Today, they are just two individuals who are too busy fucking each other to care. A Master and his submissive Servant.

"More, more, more. Right there, Shirou!" she cried.

They went from their previous missionary position to a standing doggy-style. Caster placed her hands on the walls in front of her, to stabilize her form from falling over, and Shirou who is now beyond reasoning and logic is ramming straight inside her pussy. His hands clutched at her hips to guide his cock as his hips clashed against hers.

Yet this wasn't enough for the redhead, he let go of one of his hands from clamping her hips and raised it above his head.

A loud smack resounds throughout the room. Caster gasped from the sudden pain as a hand-sized imprint now coloured her ass, she could not hold herself back. The ecstasy, pain and constant pleasure meld together with the feeling of lack of control brought forth a mighty orgasm that pushed into her.

"Oh, ooooooooaaaaaahhhh! Cumming!!!" she wailed.

Shirou need not an instruction to comply with his body needs, his hips clinched as he floods Caster's womb with his healthy and virile seed. Caster's face was smooshed into the wall as the pressure of her orgasm and Shirou's ejaculation pushed her forward. Her limbs lay uselessly at her side. The full weight of everything that had happened in the past half an hour or so crashed into her fully, from the lack of air to the exhaustion to her brain simply wouldn't comply with her.

Before Caster could crash into the floor in a miserable heap, she felt arms enveloping her. It felt strong, warm and above all... kind. It was the gentle hand of a hero.

She opened her eyes to see the worried face of her Master. She laughed at his expression, "We're... going to be late with the breakfast, are we?"

Shirou blinked confusedly before realizing the stock that she had prepared. "...yeah," he admitted sheepishly. He lifted her up to his arms, the water around them had been thoroughly drained from the tub leaving only but a puddle where the hot waters should be. "But we could wait for later."

"Oh my? I never thought that you'd shirk on your schedule so easily like that, Master?" she teased.

He laughed, "Cut me some slacks. I'll prepare it. It's just... right now, I just want to do this," he tightened his grip. "That's also what you wanted, right?"

As she rest comfortably within his arms, pussy still attached to his cock that is pumping his seed, and wet and sticky all over, Caster couldn't help but agree. "Very well. We could stay like this for the next 5 minutes." she cooed and rested her tired head against his own. A fluttering feeling within her chest all the while.