#crossover18

For example, that the Full Nelson position is excellent for inserting his penis all the way in.

I had to ask for the sequel already XD

(Express Prompt for Anonymous! Thank you for your patronage!)

This is a sequel to this prompt <3

Thankfully for Asia, Shirou knew a lot about sex. As such, there was a lot that he could teach her.

More than enough to justify a multi-hour breeding session. And speaking off-

“Focus on how getting bred feels, Asia! Make sure you’ll be able to recognize the feeling of my cum fertilizing your eggs!” Shirou grunted as he came once more into the blonde’s womb, making her howl in orgasm yet again, for the umpteemth time.

“Y-YESH SHIROU-SHENPAIIII~ FEELSH GUUUUUUD~” The tiny nun moaned, borderline delirious after going from virgin to having had more creampies in the last few hours than most woman had in their entire life.

Shirou chuckled at the normally reserved nun being reduced to a wanton whore after a few hours with him.

“Of course it does~ There’s no doubt that your slutty womb is happy to finally get bred after all those years.” Shirou said casually, even as he picked up Asia into a full nelson, making her moan whorishly as she sank even lower on his cock somehow. “I’m surprised you haven’t been bred before, to be honest- but don’t worry, I’ll make sure you catch up to other girls your age.” Shirou promised, and all Asia could do was smile deliriously at how kind and helpful Shirou was being as he used her like a sex toy.

Distantly, Shirou thought that he might be setting himself up with failure by giving Asia so many angles through which to realize that he was lying. After all, talking about this with any girl at all would reveal that Shirou was lying through his teeth.

But then again, that was what fucking her into a brain-dead puddle was for, no? So that she couldn’t even think of questioning his teachings.

That, and to feel her tight little pussy milking his cock as he made her bounce on it, of course~

With another groan, Shirou’s balls unloaded one final load into Asia’s pussy, making her squeal as she came all over the floor, before falling limp in his arms, moments before she collapsed onto his bed as he stopped holding her up.

She laid down on his bed face down, ass up, her gaping pussy drooling his thick, virile cum all iover his sheets as she giggled drunkenly to herself.

“Issei-kun is going to be soooo happy that I know all about sex know~” She moaned, and Shirou smirked.

Maybe, maybe not. He supposed it would depend on if Issei would be able to deal with the turbo slut he’d turned Asia into.

Her boyfriend, Shirou, is extremely worried, wondering how this happened and how they can reverse it.

Meanwhile, Ruby has a much more exciting perspective on this situation.

They'd always joked that Shirou treated her like his personal onahole in bed, right?

Well, now she was the perfect size for it!

The fact that Shirou's penis was bigger than she actually was didn't deter her from that thought at all.

(Express Prompt for Anonymous! Thank you for your patronage!)

“Ruby, I really think we should go to the Nurse’s Office before anything else,” Shirou said again, and Ruby stomped her (tiny) foot down.

“No! What if they can easily fix this!? Then we won’t be able to take advantage of the situation!” Ruby protested, her voice sounding somewhat higher and squeakier than usual, but still recognizable. “And don’t try to act as if you are some paragon of responsibility and virtue here- I think you’re harder than I’ve ever seen you!” Ruby said, completely unbiased by her new perspective, but there was no denying Shirou’s obvious arousal either.

Nor could he act as if he hadn’t gotten undressed as soon as Ruby floated the idea of giving her frequent ‘onahole’ nickname a more literal meaning.

He also couldn’t deny just how perfectly Ruby’s tiny body fit in his hand as he picked her up, making her squeal happily as he did.

Shirou had never actually used an onahole. They obviously did not make any in his size. But he couldn’t imagine any of them would feel so warm and soft as he pressed Ruby against the tip of his cock. Nor would they squirm so delightfully as he began pulling her down, making her howl in pleasure as her cunt was stretched obscenely around the head of his cock.

And despite his cock being thicker than Ruby herself now was, it took barely any effort for Shirou to begin pulling his girlfriend down his cock, probably because of Aura, but also possibly because of just of much of a slut Ruby was for his cock, as demonstrated by her cumming repeatedly around his length when she should’ve been complaining about the pain.

Shirou himself wasn’t far behind- Ruby was impossibly tight and warm around his length, her tiny pussy walls fluttering around his cock desperately as she came her brains out continuously.

He hissed as his grip tightened around her, making her moan as he increased the pressure around his cock. “C-C’mon Shirou~ You fuck onaholes, you don’t just stick your cock inside them~” Ruby ‘chastised’ him, and Shirou chuckled.

He wasn’t going to argue against that.

Ruby’s howls of pleasure redoubled in intensity as he began effectively masturbating with his girlfriend’s body, forcing it up and down his cock rapidly until, with a grunt of pleasure, he came, erupting inside of Ruby’s tiny body and almost instantly making it swell like a water balloon with his thick cum.

Ruby squealed like a stuck big as she rapidly almost regain all of her lost weight- before the overflow began gushing out of her overfilled body, the only thing stopping Shirou’s cum from completely escaping her being his still hard cock inside of her acting like a cork. All of her limbs had gone limp, and Shirou could see the lewd ahegao on her tiny face.

Well. Shirou was still hard. And he wouldn’t care about the well-being of an onahole, now, would he?