[Fusion, Hyper Futanari, Domination Loss]

Chaldea. The organization that stood against the threats to human history. At least, that’s what they wanted people to believe. But as more and more Servants came in, and more and more of them started to mingle with the humans among their ranks… It became harder and harder to focus.

Especially in the case of the sole Master, Gudako, and her loyal kouhai, Mash. Both of them had been afflicted with a certain status that led to the two ending up with cocks that they couldn’t handle on their own. Something that they had attempted to cure with the help of Nightingale, one of the few Servants that had some sort of medical knowledge.

All that happened when they went to get examined by her, was a thorough milking. Again. And again. and again. That was the only thing that happened when they tried to ask her to help them cure her. Something that led them to fall into further and further dependence on the nurse.

Little by little, their bodies started to change as a result of this thorough milking. The most obvious changes were the ones that happened to Mash, as her body grew stronger and more potent. Whatever hormones that powered her cock were affecting her physique as well, making her leaner and stronger than most of the other humans in the base. Not that she wasn’t already, given her Demi-Servant status, but it was nice to tower over them and casually humiliate them with her clear superiority. And really, when you had a cock that could literally be called a third leg, wouldn’t you be bragging about it?

Gudako, on the other hand, was nowhere near as fortunate. Sure, she was still packing quite the heat, as her cock reached all the way down to her knee… But compared to the purple-haired Shielder, who had been able to use her as an onahole at least once by slamfucking her ass with her enormous rod? She was nothing. And that only grew more and more evident as the two kept being milked, as it was like her body grew demure. She didn’t stand out. Everything that she was proud of before, especially her smile, had been taken away by her Kouhai…

At least the hormones were blessing her ever so slightly, though only so she was more appealing as a fuckdoll. Fatter tits, fatter hips, and thighs that could cushion any cock that wanted to ram into her. It was why her session fucking all night with her Kouhai had gotten so much rougher. Because they could both take so much more…

She was proud of that much. She really did like her new tits. She loved the fact that she could milk Mash until she blew bucket loads of cum all over her. She loved how she could ride her all day long. And she did love how her cock, as smaller as it was compared to hers… She loved how it could just blast loose until it finally ran dry, only to stand straight moments later as she refilled to the bursting point. That was her strength, the endless stamina…

But that didn’t mean that their relationship was anywhere close to equal. There was a dominant, and there was a submissive. And she was clearly the submissive. Something that became ever more apparent as the original curse that had given them these cocks started to progress even further.

They wouldn’t remain separate for much longer, as the ultimate part of the curse started to take effect. The thing that would eliminate them both from the equation…

And bring forth a goddess that would ruin everything Humanity had planned.

---

Mash licked her lips. She could feel that tonight’s session would be different. There was something about the way that her cock trembled that made her certain. It never got this throbby before she had sex, and it certainly never wanted to blow its load all over her ‘Senpai’ before the two had gotten into it…

“Senpaaaaai…” The purple-haired girl chimed as she practically towered over her living cocksleeve, the shadow of her throbbing rod covering her completely. “Are you ready? You’ve been a good girl today, right?”

Gudako nodded slowly as she squirmed in her bed. This was a ritual that the two had begun to practice. Ever since they began being milked dry by the Nurse, she instructed that they should form proper dynamics, to see how their bodies would react. And since the Kouhai was the one with the larger cock, she was the dominant.

“I’ve been really good, Mash…” The ginger-haired girl said, her cock squirting out a little clear precum which gave her tits an extra bit of shine. “I cleaned all the cocks you told me to, and I didn’t cum a single time…” She admitted. This was her duty as a Master. To serve those that she had summoned. Because that was what her Dominant told her. Honestly, she enjoyed the entire experience, but none of the cocks even came closer to the one that had used her as relief time and time again.

Mash smiled. “Of course you did. I heard Da Vinci talk about how good you’ve gotten over the last few weeks. You could barely fit her third arm in your throat when you started, but now you throat it all in a few seconds, and she doesn’t even have time to force it in before she ends up filling your stomach with all of the sticky goo she’s got pent up.” She said, degrading the girl further with her backhanded praise.

“Mm-mmhm! I had lots and lots of cum today, and…” Gudako said, as she slowly spread her legs. Even as her cock rested in between her tits, giving them more of a glaze thanks to the steady supply of precum, she still had a hole between her legs. One that needed to be filled just as much as she needed to fill another hole. “My lower mouth’s still hungry for yours…”

The purple-haired girl shook her finger. “That’s not how we beg for cock, is it, Senpai?” She chimed. Oh, she loved to bully her like this. Ever since she became a walking goddess in all but name, she could just order her Senpai around like this. It was something she had always wanted, but she never got the chance. Not until now. “Try again. And then I’ll give you as much of it as you want.”

“I…” The ginger-haired girl squirmed and panted. Her cheeks were bright red as she slowly grabbed ahold of her inner thighs, spreading them slightly to expose the lower lips underneath her balls. “Please fill this useless Magus hole with all of that potent Servant seed, until I look like I’m about to burst..!”

Mash licked her lips. That was exactly what she needed, as her cock pulsed enough to grow an additional inch. “Of course, Senpai.” She said, the word slowly drooling down her lips as she let it linger. All while positioning the tip of her third leg against that hole…

Without even giving her a moment to brace herself, she slammed it all in. Every single inch of that massive meat sliding straight into that hungry hole, breaking it in completely. Even though it had already gotten smashed several times in the past, nothing compared to the purple-haired girl giving it her all.

Gudako let out moan after moan after moan. The bigger girl hadn’t even started thrusting, only hilting herself so far inside that her massive member was visibly outlined on her body, but that was still enough to nearly drive the stacked ginger to a near climax. She couldn’t even see straight, her eyes spinning the more she felt that cock sliding into her most precious chamber. And her cock, her poor shaft, was already squirting out proper small doses of cum, covering her face in sticky white goo.

Once Mash felt that nice cervix trying desperately to wrap around her cock, she started slamming harder and harder. She really put all of the energy in her hips into every thrust. She wanted to utterly destroy her Senpai. Put her in her place, and show her just how little she mattered. Maybe she had gotten too into the role as a dominant, and wanting her Senpai to disappear was going overboard. But that’s what her heart was telling her to go for. It was why she didn’t care how much the poor girl was being stretched. Because a natural masochist like her was probably into it!

The ginger-haired magus kept on moaning, her brain practically breaking from how powerful every thrust was. It was like she was getting fucked several times over, all at the same time. It felt like her very understanding of the world around her was crumpling into nothing. It was like she was being bred into being little more than a toy. And that was all that she’d be good for. That was what her innate submissive told her. That was what she felt that she should be. And the more she accepted this fate, the more she came, orgasm after orgasm piling on and on.

Both of their feelings weren’t natural. They were abnormal, caused by the stimulus that they had been receiving. Both from one another in this twisted submissive and dominant relationship, and from the doctor that had recommended it. And it was because of this abnormality that things started to change even more…

“Senpai! You slut, you’re good for nothing but a quick and easy fuck!” Mash cried out as she kept slamfucking that vulnerable womb. God it felt so good to hammer into it. She could do this for hours upon hours. She could literally do it until the week ended. That was the amount of stamina that she knew the two had. She could keep going until either of them finally passed out… Only for the two to start right back up where they left off…

Of course, she wasn’t aware that her words were affecting both of them. In fact, it felt less like she was fucking somebody, and more like she was idly thrusting her thighs forward into the mattress.

Gudako’s heart resonated with the degrading words that left her Kouhai’s lips. And she gave in, letting herself be degraded. At the same time, it felt like she was becoming much more. It didn’t feel like she was being fucked… It felt like she was part of something. Which became all the more apparent as her cock started to tremble, refusing to let out the cum that had been stockpiling inside her balls.

The two weren’t fully aware of it, but they were becoming one. The curse that had given them the cocks was ultimately designed to turn one of them into a hyper dominant, and then make them absorb the submissive. Leaving one dominant behind, one that was ready to breed everyone around her. And since the demi-servant had broken past that threshold, she was starting to integrate her Senpai into her…

Mash kept on thrusting. Unaware that the ginger was absorbing into her. Unaware that she was just thrusting into the mattress. But it didn’t matter. She was so close. She was so dangerously close that just a little more was all that she needed to blow a load so huge that she wouldn’t be able to think for a couple minutes. That was all that she needed..!

Gudako was close as well. Though her climaxes had already gone through her so quickly that it was hard for her to distinguish between them all. She just knew that a bigger one was coming, and that it would blow her away completely. Something that she didn’t quite understand, but it felt wonderful regardless.

Both the Dominant and the Submissive cried out in unison, and the latter found herself completely absorbed. In that very same moment, a powerful orgasm overwhelmed the larger girl, making her balls pump everything out at the same time. It was like one powerful squirt splashed against the back wall of the room, draining every bit of energy from her body at that moment.

Mash quickly recovered, panting as she started to look at herself. She immediately noticed that her Senpai was gone, and her heart didn’t even skip a beat. It was fine. She didn’t matter. What mattered more was the immense growth that she underwent…

In fact, it was her regained consciousness that triggered the rest of her body’s expansion. Her tits, already the size of her head from her dominant growth, doubled in size. Her ass, already big enough to crush a man between both cheeks, were now threatening to destroy a chair if she as much as grazed it with either cheek. Her body itself had grown, threatening to bump up against the ceiling. This time, for sure, she had become a goddess. She was two girls in one, after all.

Oh yes. She could feel her Senpai inside her. That very same Senpai that had fallen in love with her cock. The same that she had dominated so thoroughly that their dynamic was completely and irrevocably set in stone. And now, she served as the reason why she was so massive…

“Thank you, Senpai.” Mash giggled. This would be the last time that she gave her honest thanks. After all, she was a part of her now. Which meant that she didn’t have to worry about her. And that meant that she could go have fun with a certain somebody…

It was time to go say hi to the nurse. The nurse that now needed to milk her in such a different manner…

---

Nightingale, as the head nurse of Chaldea, was prepared for a lot of things. Injuries? Amputation. Sickness? Amputation. Her Madness Enhancement meant that she went to extremes whenever certain elements were involved, regardless if an alternative solution was presented.

In the case of the mad cocks that had grown from her Master and the Shielder’s crotches, she had recommended that they remained completely empty at all times. An extreme solution, but one that seemed to work initially. When their conditions worsened, she went ahead and subjected them to personal milking until she saw positive change.

That was when she suggested the submissive and dominant angle. Something that kept them occupied. Unfortunately, while it didn’t serve to stifle the growth of their cocks, they weren’t a problem any longer. It was less a symptom or a sickness, more a sign of something they needed to work out.

So imagine her modest surprise when she woke up in the middle of the night, only to be confronted with the Shielder as she made her way into her clinic. With a lustful gaze in her eyes, and a body that could only be called divine.

“You’ve grown.” Nightingale dryly remarked, giving her a couple of small glances to examine her. It was hardly a surprise. Ever since their relationship dynamic had taken on the form she suggested, she had been growing. Something she had made sure of through their repeated meetings, where she drained all of the batter from her balls to ensure that she remained aware of her limitations.

Mash nodded with a sly and dominant smile on her face. “I’ve done much more than just grow, Nightingale.” The excessive girl said as she slowly let her hand run down her leotard, her body convulsing as something tried to escape from within. “Would you like to examine the fruits of your labor, or do you just want me to pin you down and breed you like we do every night?”

“I would like to see the fruits first.” The nurse said with the same dry tone, as she grabbed a scalpel off her desk and slashed through that leotard that barely fit the mini-giantess at this point, hoping to see something noteworthy underneath.

What she saw couldn’t be called noteworthy. It would be inappropriate. The right term, and the one she felt the most passionate about, was awe-inspiring. Because her legs were on the verge of giving way, and her tongue was hanging out of her mouth. Even in her usually emotionless state, she was now displaying insane amounts of wanton thirst, at a level not often seen from any slut within Chaldea’s walls.

The cock that hovered in front of her, covering her in its shadow, was nearly the size of the girl who wielded it. So much meat, equipped on a single girl. It was inhuman. It was improbable. And most importantly…

She needed it. She needed it to such a degree that she immediately climbed onto the same table she used for her operations, spreading her legs apart and presenting her fresh pussy for the near-goddess to consume. She didn’t even say a word, her eyes filled with hearts as she was now driven by her natural need to breed…

This was the effect of the curse. The sheer dominance was radiating off Mash to the point where it would be impossible for anybody to resist it. She just had to let her musk reach somebody’s brain, and they’d be transformed into a cumdump for her to break in. And that was exactly what she wanted, as the nurse had been such a tease for so long, dominating her despite her increased power and size.

“I’ve been waiting for this for a long time, Nightingale…” The Shielder-turned-Goddess licked her lips as she pinned her hands down on the much smaller woman’s thighs. The same thighs that had milked her dry with ease so many times before. It felt so good to be on the dominant side of things. But she had to resist the temptation to rub one out on these. The prize was right there in front of her. The nurse was ready to be broken in…

And break her, was exactly what the mini-giantess intended. She slammed that massive thing straight into that hole. She could feel the poor nurse’s cervix shattering right then and there, as she could practically wear the woman as a condom with how huge her rod was. it was actually a little silly, but the grip on her thighs meant that she could push it as far inside without the woman being pulled along by the cock.

Nightingale was having an experience that could only be described as pure bliss. Her Madness Enhancement made her desensitized to a lot of things. Not to this. This massive rod was going to be the thing that broke her. Especially as it hammered in and out of her, and it hadn’t even gotten going properly…

Mash loved the feeling. She loved having that nurse wrapped around her. She loved the fact that she was utterly and totally submissive for once. It was like a breath of fresh air. She could just keep thrusting, even at a slow pace, and she’d still be enjoying every moment of it…

But she needed to make sure that she understood how their relationship would be from this point forward. She brought her a-game. Smashing as hard into that hole as she could. Stretching it around her rod to make sure that nobody else would satisfy her in the same way that she did. And making sure to thrust so deep that she was on the verge of breaking into her ovaries, so that the impending orgasm would flood her to the point where the universal law that Servants couldn’t be impregnated got overridden. They were going to mate until she was sure she was pregnant, and nothing would stop her.

The purple-haired girl let out a powerful roar as she slammed her cock as deep inside as it could possibly go. Getting it stuck inside the small canal that reached into the poor nurse’s ovaries. And then, with her cock primed for the perfect spot, she let loose. Gallons of cum flooded into the nurse’s womb all at once…

Nightingale’s babymaker quickly inflated due to the sheer excess of cum. She had previously been prepared for an excess, but this was at a whole new level. It made her mind shatter completely, her eyes rolling into the back of her head as the feedback of her eggs being assaulted by seed reached into her brain. The sheer pleasure of being totally impregnated broke her, and that wasn’t even mentioning how her womb was filling with so much cum that her belly reached all the way up to the ceiling, and it wasn’t even close to bursting yet… A true sign of just how much she could handle…

And that was what Mash thought she needed to show that the Nurse was on the receiving end of their relationship from this point forward. She breathed a sigh of a relief as she slowly tried to pull out, satisfied for the time being…

Unfortunately, even a near-goddess like her could be mistaken. Especially as a pair of legs wrapped around her waist and forced her closer, as she heard a familiar and stoic breath leave the nurse’s lips…

“When did I tell you to stop..?” Nightingale said. By breaking her mind with sheer pleasure, it just fixed her. It broke the hold that her curse’s musk had on the nurse… And in turn, it meant that every single advantage that she had would crumple. Because if there was one thing that the nurse was good at…

It was turning the tables. Something that Mash became critically aware of as she was forced onto the ground, with that cum-inflated nurse letting her stomach weigh down on her without even missing a beat.

“This is an interesting development…” The nurse muttered, letting her hand rub along her massive stomach, casting a glance down on the semen dispenser that she rode atop of. “Continue pumping me full. There’s no chance that I will burst.”

Why had their relationship suddenly returned to normal? This wasn’t supposed to happen. She was a powerful dominant! She was supposed to be on top! She… She was…

‘Yes! Yes yes yes yes! Please! Milk me more! Please!’

The voice echoing inside of Mash’s mind made her eyes widen. It was the voice of her Senpai. And the more she heard that voice, the more the thoughts of submission started to fill her mind, the more her cock started to pulse, as the nurse kept looking down at her with the same low-emotive look on her face.

Both the curse, and the intended effects of it, were made null and void due to just how potently Gudako had been trained. Even after the two merged, even after she was supposed to be buried and turned into little more than fuel for the Kouhai’s body to grow… She had managed to climb her way back up. Because her need to make her partner happy, her need to submit, was way greater than the dominant girl’s need to break somebody…

The dominant personality quietly faded into the background, as the submissive took control.. And did everything that the nurse asked her to. Filling her, fucking her, whatever she wanted, she did.

Nightingale would continue to drain her. She would continue to grow. No matter how big she became, no matter how much she was pumped full of, she remained steadfast. She wanted to test out every little inch of this massive rod, until she couldn’t experiment with it any longer. That was what drove her. And that was what was forcing the submissive half of the would-be-goddess to do her bidding.

It seemed that although the two had merged, their lives would not change much. If anything, it was time for Mash to remember what it felt like to be a submissive, at the hands of not only the nurse, but anybody else that triggered her Senpai’s violent need to submit…

The would-be goddess let out another scream, climaxing yet again, as she fell prey to the nurse’s endless stamina and curiosity… The first of many new experiences for the two to enjoy.

And certainly, not the last.