Prompt: Astraea is the goddess of the balance. So when Rin declared that she and Shirou were going on a date tomorrow- Astraea had no choice but to stop in. In another world, Rin Tohsaka had been the one to get the guy as Luvia Edelfelt watched her rival enviously. She had wound up with Shirou before Luvia ever had a chance- not meeting him until after… It would not be just for Rin Tohsaka to get him a second time, it had nothing to do with Astraea's own feelings for him or how much she despised Rin, it was simply about maintaining the balance and letting Luvia have Shirou in this world… If it just so happened that Astraea was using Luvia as their vessel so Astraea got her Master as well, then that was just a happy coincidence.

Tags: Shirou Emiya/Astraea (Luvia Pseudo-Servant), sex, oral, mostly femdom


Astraea is a Caster in this despite usually being a Ruler. Takes place the night before the date in UBW where they lose Saber. Assume Shirou and Rin somehow learned her true name and don't question it.


"Heh. Fine, I'll make you admit defeat tomorrow!" Rin declared, her arms crossed in front of her chest.

"That's disturbing… are we going to continue that fight?" Shirou questioned. "I don't think Astraea will let us do that again, sorry," He scratched the back of his head awkwardly.

"No you idiot!" Rin snapped. "I'm going to show you!"

"Show me what?"

"Shinto, you idiot!"

"But… I've been to Shinto before?" Shirou pondered. "Is it something to do with the grail war?"

"Grrrrrrrrrr." Rin growled at Shirou's bullheadnesses. "We are going to go have fun! Explore the city!"

"But shouldn't we focus on the grail war?" Shirou tried to reason, he didn't have the luxury of such frivolity, not when there were still so many people to save.

"No. We are going tomorrow, and you don't have a choice. Do not sleep in tomorrow." She stomped her foot in a huff and trudged past him. "I mean it, Emiya." She warned Shirou before she was gone.

That had been an hour ago, and now Shirou was in the shower as Astraea waited in his room. She had heard every word Rin said and knew what she had in mind. But Astraea wasn't about to let Rin claim Shirou so easily. The thought of Shirou enjoying himself with Rin, with her flat, uninteresting chest and gorilla like demeanor, was more than she could bear. Astraea's eyes narrowed at the mere thought, her lips pursed in determination. No, she would show Shirou what a real woman could offer before Rin had the chance to corrupt him with her mediocrity. She would restore, maintain the balance, and not let Rin have him again. It would not be just if she didn't.

In another life, another world, Rin Tohsaka had ended up married to Shirou Emiya. They had been dating since they were 17 and by the time Luviagelita Edelfelt had met them, they were unshakable. Shirou might have been friendly, but no matter how much Luvia tried to push him for more, he never considered doing anything with her. The scale was tilted in favor of Rin Tohsaka, 1-0 against Luvia. It was unbalanced. And the balance would only become worse if she allowed him to go on a date with Tohsaka again. It was only just if Shirou Emiya wound up with Luviagelita Edelfelt this time. That would restore the balance between the two fated rivals. There was no deeper meaning to it than that...

When Shirou finally stepped out of the bathroom, the chilly air of the room caused goosebumps to rise on his skin. The cold shower had done little to dampen his arousal; his thoughts of Rin had only served to fuel it. She was sleeping just down the hall... for some reason... She probably had the cutest pajamas... maybe she would oversleep and Shirou would get to wake her up... and see her tight fitting night clothes... probably with a button undone over her chest, that seemed like a Rin thing to be so accidentally lewd. Wrapped in a towel, he shivered slightly as he walked into his small room. The last thing he expected to find was Astraea, standing by his futon in all of her naked glory.

Her skin was a soft, pale white, a stark contrast to the darkness of the night. Her breasts, full and firm, stood proudly, the nipples a rosy pink, already hardened with anticipation. Her full bust bouncing lightly as she moved. And her ass... it was almost as tantalizing as Rin's was when she had bent over during breakfast this morning.

Without a word, Astraea dropped to her knees before him. He tried to protest by whispering her name, but she ignored him. Her hands moved to his waist, deftly removing the towel that had been his only barrier to modesty. His erection sprang free, and she wasted no time in pressing it between her breasts. They were cool to the touch, but the sensation was exquisite. Her thumbs teased his shaft as she began to move them up and down, her eyes never leaving his face. The sight of her golden hair cascading down her back was mesmerizing, and Shirou felt his resolve crumbling. He knew he should push her away, that this wasn't right, but his body was screaming for more. And she clearly wanted this...

Her movements grew more confident, her breasts enveloping his cock as she began to bounce them in a slow, hypnotic rhythm. A bead of precum formed at the tip, and she leaned forward to lick it away, her tongue flicking out like a serpent's. She smirked up at him, and he couldn't help but wonder if she had done this before. The way she handled him was almost too good to be true. Each time she brought her breasts up, she'd squeeze them together tightly, creating a delicious pressure that had him thrusting into her cleavage involuntarily. His eyes rolled back in his head, and a soft moan escaped his lips. Astraea's expression grew smug at his reaction. She knew she had him now.

"Whaaat- why are you doing this?" Shirou gasped.

"This is my duty as a servant of the balance," Astraea replied simply before kissing the head of his cock. "Just enjoy and know what a real woman can do for you, before you choose less."

The friction grew more intense as she increased her pace, her breathing becoming more ragged. Shirou's cock was so large, even her massive tits couldn't cover it completely. She couldn't believe Rin had been the one to claim him first in another world. It was a tragedy, really, for someone so plain to have tasted such perfection. But she would make sure that mistake wasn't repeated here. She would restore the balance. She'd show Shirou what a real woman could offer him. She would restore balance by having him make the objectively correct choice this time.

"Look at these," Astraea whispered, her voice low and seductive as she paused in her ministrations. She cupped her breasts, pushing them together and lifting them so that Shirou could see himself disappearing between them. "These are what you need. Tohsaka's flat chest couldn't do this for you, could it?"

Shirou's eyes widened at her audacity, his face flushing red. "A-Astraea, don't talk about Rin like that," he managed to stammer out. But even as he said it, he couldn't deny the truth in her words. Rin was... less endowed than the blonde servant. And while he admired her for who she was, he couldn't argue with the fact that Astraea's body was built for pleasure... "Rin has other things..." Shirou protested half-heartedly.

Astraea scoffed, her golden eyes gleaming with victory. "Other things? Like what? Her gorilla-like brutishness or her stubbornness? The fact that she's a total tsundere?" She took his moan as affirmation and leaned in closer, her breath hot on his cock. "I can give you what she can't, Shero. A taste of a real woman… although there's not a single woman who offers less than Tohsaka."

With that, she took his entire length in her mouth, her lips wrapping around him tightly. She began to bob her head, her cheeks hollowing as she took him deep into her throat. The warm, wet sensation was unlike anything Shirou had ever felt, and he couldn't help but gasp. He had never been with a woman before, and he had certainly never expected his first experience to be like this. Astraea's tongue danced around his shaft as she deepthroated him, her throat muscles contracting around him in a way that made his legs wobble.

Her eyes never left his, and she could see the shock and pleasure reflected in them. She pulled back for a brief moment, a smug smile playing on her lips. "See, Shero? This is what a real woman can do for you. Tohsaka's mouth couldn't fit even half of this," she said, her voice a seductive purr. "Don't be a fool this time, Shero."

Shirou's face flushed a deeper shade of red, and he couldn't find the words to respond. Instead, he felt his hips buck forward instinctively, and she took him back into her mouth without hesitation. Her throat was tight and welcoming, a stark contrast to the cold shower he had just stepped out of in an attempt to avoid something like… adjacent to this. He could feel himself reaching the edge, the pressure building with each passing moment.

Astraea could sense his impending climax and took him out of her mouth again. "Now, let's not get ahead of ourselves," she murmured, her voice thick with lust. She began to stroke him with her hand, her mouth moving down to his balls. They were tight and heavy, and she took one into her mouth, her tongue flicking it gently. Shirou's eyes rolled back in his head, and he gripped her hair to keep from falling over. She let out a small moan of encouragement. He had never felt so vulnerable, so exposed, and so utterly at the mercy of another person.

Her hand moved back to his shaft, and she began to jerk him off again, her mouth still wrapped around his balls. Her other hand reached up to play with her own breasts, her nipples standing erect with excitement. She knew she had him now, and she was going to make sure he didn't forget this night.

The pleasure grew too intense for Shirou to protest anymore. Astraea's expert touch had reduced him to a quivering mass of need, and he could only watch as she positioned herself over him, her breasts once again surrounding his throbbing cock. Her smile grew wider, her golden eyes gleaming with victory as she began to bounce up and down, her large breasts enveloping him in a warm, velvety embrace. The sensation was heavenly, and Shirou could feel his climax approaching like a freight train, unstoppable and all-consuming.

Her breasts were so substantial, so large and firm. They felt so perfect. He reached out, his fingers digging into her shoulders as he thrust up to meet her movements, their bodies moving in a silent symphony of lust. Astraea's eyes remained locked on his, and she could see the desperation in them, the need for release that only she could provide. Her movements grew more frenzied, her breasts smacking together against his shaft with each bounce, creating a delicious friction that had him on the edge.

With a final, guttural groan, Shirou exploded, his cum shooting up to cover Astraea's breasts and face. She didn't miss a beat, continuing to bounce her tits tightly on his cock even as he spasmed, his seed coating her chest and neck. When she finally came to a stop, she leaned back, her chest heaving with exertion, her eyes never leaving his. She licked her lips, tasting the saltiness of his essence, and smirked.

"Look what you've done," she murmured, her voice a sultry purr. "You see this?" She gestured to the mess on her body. "Rin couldn't do this for you. Her chest is a valley compared to my mountains."

Shirou's cheeks burned with embarrassment and arousal as he watched her slowly clean herself up with her tongue, savoring every drop of his cum. Her actions were so brazen, so... animalistic. It was a stark contrast to Rin's shy nature, and it was intoxicating. He knew he should be ashamed, that he should push her away, but he couldn't. It's not like he and Rin were anything anyways, he shouldn't feel guilty! He just liked her... but he liked Astraea too. The pleasure was too much, the thrill of the moment too overwhelming.

With effortless strength, Astraea pushed Shirou onto his back, straddling him with ease. He felt the heat of her pussy pressing against his cock, and she reached down to guide him inside her. He gasped as she lowered herself onto him, her tight, wet warmth engulfing him inch by inch. Her eyes never left his, and she bit her lip in a silent challenge as she took him fully, her inner walls stretching to accommodate his length.

Her hips began to rock back and forth, her breasts bouncing with every movement. They were magnificent, perfectly shaped mounds of flesh that jiggled with each thrust. The sight of her riding him, her expression a mix of triumph and pleasure, was almost too much for Shirou to bear. He reached up to cup them, his thumbs brushing over her hardened nipples, and she moaned in approval. Her skin was smooth and soft, her breasts heavy and warm in his hands.

Astraea leaned forward, her golden hair cascading around them like a curtain, and whispered in his ear. "You see, Shero? This is what you would be missing with Tohsaka. I'm not like that flat-chested girl you're so hung up on. I can give you what you really need. Choose me!"

Her movements grew faster, her hips grinding against his pelvis as she worked herself towards climax. Shirou could feel the walls of her pussy tightening around him, squeezing him like a vice. He had never been with a woman before... and she was so... intense. She was like a force of nature, demanding and unyielding, and he found himself unable to resist her allure. His hands roamed her body, exploring the curves and planes of her waist and hips, his fingers digging into her flesh as he held on for dear life.

Her breasts swayed before him, begging for his attention. He leaned up and took one into his mouth, his tongue flicking over the sensitive peak as she gasped and threw her head back. The taste of her was intoxicating, and he knew he could never get enough. He suckled and nipped at her nipples, feeling her tighten even more around him. Her movements grew erratic, and he could feel her approaching the edge.

Shirou's hands gripped Astraea's hips, guiding her in a rhythm that felt like it was carved into his very soul. Her wetness was like a warm embrace, coating him with every thrust. He watched as she threw her head back, her golden hair a wild mess around her shoulders. Her eyes were squeezed shut, and her mouth was parted in a silent scream of pleasure. He could feel the muscles in her thighs tightening as she bounced faster and faster, her orgasm building like a crescendo.

Their bodies moved in harmony, a dance as old as time itself. Each movement was a declaration of war, each touch a battle cry. Astraea's pussy was tight, a perfect fit for his cock, and the sensation of her riding him was unlike anything he had ever felt. He could feel her clenching around him, her wetness increasing with every movement. The noises she made were animalistic, and they filled the room, drowning out any thought of morality or propriety.

And then she was there, her body convulsing on top of his, her pussy spasming around his dick as she came. He felt the warmth of her release, the walls of her sex fluttering against him, and he knew he was lost. With a roar, he gave in, his hips bucking upward as he buried himself deep inside her, filling her with his cum. The world around them shuddered, the very fabric of reality seeming to warp and bend to their will.

Their orgasms crashed over them like a wave, leaving them both gasping for breath. Astraea's body went limp on top of him, her head falling forward to rest on his chest. He could feel the pounding of her heart, the rapid rise and fall of her chest. She was alive, she was real, and she was his. How was anyone supposed to compare to a goddess like her? No mortal had a body like that...

For a moment, Shirou allowed himself to bask in the afterglow, his arms wrapped around her, his cock still deep inside her. But the weight of what he had done settled on him like a dark cloud. He knew he had to tell Rin, he didn't know what there was between them, but he knew she would be upset. But for now, he just held Astraea tightly, their bodies sticky with sweat and cum, and enjoyed the feeling of her in his arms.

Shirou's hands began to roam her body, tracing the curve of her spine, the dip of her waist, the swell of her hips. Her skin was softer than silk, and he marveled at the feeling of her ass in his palms. He squeezed gently, feeling the muscles there tighten and release. Her breath hitched, and she pushed back against him, her pussy still spasming around his cock. His cock hardened again.

With surprising strength, Shirou rolled them over so that Astraea was now on her hands and knees, her golden hair fanned out around her. She looked over her shoulder at him, a smug expression on her face. "Is this what you want, Shero?" she purred, her voice thick with desire. "To take me like your property? But what would your darling Rin think?"

He didn't bother to respond with words. Instead, he lined up his cock with her wet, open pussy and thrust into her, hard. She gasped and arched her back, her breasts jiggling with the force of his entry. He grabbed her hips and began to pound into her, his thrusts deep and powerful. He had never felt so alive, so in control. Her insults to Rin had brought out a side of him he didn't know existed, and now he was going to show her just what he was made of.

Astraea's eyes went wide with shock, and she let out a low moan. She had been the one in charge up until this point, but now Shirou had taken the reins. She could feel him filling her up, stretching her out, and it was glorious. Her body responded to his newfound dominance, her pussy clenching around him as he drove into her over and over again. She could feel another orgasm building, one that was going to be even more intense than the last.

Shirou leaned over her, his hands gripping her hips tightly. He whispered in her ear, his voice a gruff growl. "You're right, Astraea. Rin can't compare to your body." He paused, driving in deep and hard, making her gasp. "But I'm going to fuck you so hard, that you stop feeling the need to bring her up all the time."

Her eyes narrowed, and she threw her head back, her golden hair a wild mess around her shoulders. "You're just saying that," she taunted, her voice breathy with pleasure.

Shirou's grip tightened, his hips slapping against her ass with each thrust. "No," he said, his voice thick with lust. "I'm going to fuck you so good, you'll forget about this stupid rivalry."

Astraea threw back her head and screamed his name, her body convulsing as she came again. The sound echoed through the room, and Shirou shuddered at the sudden tightness around his cock. He wasn't going to let her win this battle of wills. He was going to claim her fully, make her his in every way possible. His strokes grew harder, faster, and she began to scream his name with every thrust, her body tightening around him like a vice.

"Oh, Shero! Yes, Shero! Fuck me harder!" she shouted, her voice raw and desperate. Her nails dug into the tatami mat, her body shaking with the intensity of her pleasure.

He didn't relent, his movements becoming almost violent as he claimed her. Each time she moaned his name, he felt a surge of power, his cock growing harder, his movements more punishing.

Astraea's orgasm hit her like a thunderbolt, and she screamed, her entire body going rigid. He could feel her pussy pulsing around him, the warmth of her release coating his cock. But Shirou didn't stop. He fucked her harder, his hips moving in a relentless rhythm. Her moans grew louder, more desperate, and she began to beg for mercy.

"Shero, please, I can't take it," she panted, her voice strained.

"You can," he growled, his own breath coming in ragged gasps. "You're supposed to be the perfect woman. You can take whatever I give you."

And she did. With each thrust, she took him deeper, her body responding to his with an almost feral need. She screamed his name again and again, her voice bouncing off the walls of the small room. He could feel her tightening around him, her muscles clenching in anticipation of another orgasm. He didn't relent, pushing into her until he felt her body begin to shake once more.

"Yes, Astraea," he hissed, his own release building. "Come for me again. Show me that you're mine."

Her response was a scream that seemed to tear itself from her very soul. Her body convulsed around him, her pussy gripping him like a vice. He watched in awe as she came, her eyes squeezed shut, her mouth open in a silent scream. It was the most beautiful thing he had ever seen, and he knew that he would never forget it.

Shirou's own climax was building, a pressure that threatened to overwhelm him. He fucked her faster, harder, each stroke pushing him closer and closer to the edge. He could feel her pussy tightening, her body begging for release, and he knew that he couldn't hold out much longer.

"Astraea," he groaned, his voice strained with effort. "I'm going to cum."

"Do it," she gasped, her eyes opening to meet his. "Cum inside me, Shero. Make me yours."

The words sent him over the edge. With a roar, he emptied himself into her, his cum filling her up, making her his. He collapsed on top of her, his body spent and heavy. His cock remained buried deep inside her, still twitching with the aftershocks of his orgasm. Astraea's face was pushed into the tatami mat, her cheek flattened against the firm surface, her eyes closed tightly as she felt him fill her. The heat of his seed inside her was intoxicating, and she could feel her own body responding, the muscles of her pussy clenching around him, milking every last drop.

For a moment, there was silence, their breathing the only sound in the room. Then, slowly, Astraea's body began to relax, her muscles going slack beneath him. Her legs quivered slightly, and she let out a contented sigh. Shirou's weight was a comforting presence, and she felt oddly at peace, despite the guilt that still gnawed at the edges of her consciousness. They lay there, their bodies entwined, not moving, not speaking. The air was thick with the scent of their passion, a musky, sweet aroma that seemed to cling to their skin.

Shirou's chest rose and fell heavily, his breaths slowing as he drifted into a peaceful slumber. His arms remained wrapped around Astraea's waist, his cock still lodged deep inside her. Her own breathing began to even out, matching the rhythm of his. The warmth of his body was like a blanket, and she found herself succumbing to the siren's call of sleep. Her eyes grew heavy, and she let them fall shut, her head lolling to the side.

The morning sun peeked through the window, painting the room in soft, golden light. Rin Tohsaka, dressed in her usual attire, was not happy. Today was supposed to be their special day... and Shirou had chosen today of all days to sleep in. She supposed it was somewhat understandable with some whore in the neighborhood spending the whole night screaming but still... today! They were supposed to go on a date!

"Shirou, we're going to be late!" she called out, her voice sharp with irritation. But when she saw the scene before her, she froze. There lay Shirou, sound asleep, the picture of peace, his body entwined with that of the naked Astraea. Her eyes widened in horror as she took in the sight of his absurdly large, still erect cock, buried to the hilt in the servant's pussy.

"What the fuck?!" she yelped, her hand flying to cover her mouth. The shock and disbelief on her face was palpable, her cheeks flushing a deep shade of red. She couldn't believe what she was seeing. Her best friend, the one she had harbored feelings for, the one she had promised to show a good time tomorrow, lay sprawled out with his servant. The cow. The sight of Shirou's cock too... why was it so big... and why was it inside of that bimbo?

Her thoughts raced, her heart pounding in her chest. The room felt suddenly stifling, the air thick with an unspoken tension. She wanted to scream, to demand an explanation, but the scene was too jarring, too raw. Instead, she backed away, her eyes never leaving the couple on the floor. She stumbled out of the room, her mind reeling with a whirlwind of emotions. Of all the things to happen, why did it have to be today of all days! That jerk had even agreed to go on a date with her today!


A/N:Short and sweet, but kind of fun. Loved the idea of Astraea justifying her wanting to fuck her master with "maintaining the balance" but could not figure out a way to write it into the actual smut. Hopefully I remembered to make every time Astraea says Shirou's name in dialogue say Shero as Luvia does. Not a ton to say here, but it was fun, thanks for the prompt!

Next up is a Shinji Matou cucking Shirou wooo there are a lot of those prompts! One that I'm kind of eh on how it turned out as most people (Oddly not Shinji though) feel very OOC and it was way longer than I wanted - like it's over 10K words for a fucking prompt I thought would be 3K lol. Look forward to that I guess. Leave a like, fave both me and this fic to not miss future prompt responses. Please comment more prompts even though I have plenty, I like having options and genuinely just reading them. Chronological order of submittance has very little bearing on what I do next, I choose what's vibing for me at the time.

Alright let's see how weird I can get with prompt themes this time. I want an excuse to reread a bunch of interludes in FGO. So give me prompts that are derivative of one of those. Like for example, I have one on my list that is the interlude Jason just got but the reason why so many people showed up to Argonaut tryouts is because Medea Lily slept with them so they would come and Jason wouldn't have to be so discouraged. Can be about anyone in the interlude, just tell me which it's from. Or again, feel free to ignore my suggestion and give me more Shirou/Ritsuka/Shinji prompts or whatever.

Not sure if the link will work since the pastebin ripoff I set this up went down last night, but if the server is back online then great! If not, I'll fix it by the next chapter on a different site, but didn't save it in a google doc like an idiot, and don't want to reformat stuff today. Here's a link of all the prompts I've come up with on my own it's like 40 or so?

/r/SceptredGleet

Generally, my prompts aren't in the same place as the rest, so I don't look at them when I sit down to write. Had someone request that I do some of my stuff more rather than just prompts, so here's all of my ideas. I mostly prefer twisting others ideas to come alive for me, but if you want to "sponsor" one of my prompts and express interest in it, it would theoretically be more likely to be written. Theoretically. Some of them are longer full story ideas that would be separate from this. Ones with FGO JP spoilers are all at the bottom, if I managed to order them correctly. 95% of the ideas on there were written before I wrote my first ever smut scene so a lot suck but... If you want to look at them, they might be there. Stupid normal pastebin not allowing adult content on unlisted posts anymore. I'll update the link each time I have like five new ideas or whatever probably, idk still figuring this out.

Anyways yeah, kudos, subscribe, comment, bla bla bla.