[Symbiote, Brainwashing, Pregnancy, Weight Gain]

"So that's what caused all the shaking a few days ago..."

The voice of one heroic young lady, who had just joined up with the girls that strived to protect the city of Equilibre a few months ago, echoed out as she carefully looked at the crater that had formed outside of the city. All while looking at the rock-like object in the center, the thing that had embedded itself in the ground after crashing down from the skies above.

Her name was Shima Shiro. Formerly the one known as Natura Couleur, now the group's steadfast and supportive ally as Natura Arc-En-Ciel. And though she was not yet transformed into her heroic form, she still tried to carry out a few duties. Especially since the group had their hands full with other sorts of crimes and troubles. As it turns out, dealing with one big bad evil lady didn't put an end to the various problems that spanned the city. If anything, it just allowed them to run amuck.

But at least she could provide that little bit of relief so they wouldn't have to worry. All it took was descending towards the rock, and then investigating it. To make sure that she wasn't in danger, she had abused part of her power already. Just a little barrier that was meant to keep hostile entities out and keep her safe. Nothing much more complex than that.

"For a meteorite, it's not very impressive." Shiro muttered as she slowly caressed her cheek. It was around the same size as one of her thighs, give or take. And it looked like she could... Well, she could quite literally just pick it up and carry it back home with her. Not that she'd want to display a meteorite for people to gawk at, but it was definitely an option.

As she kneeled down to gaze at it ever closer, the shell started to crack ever slightly. It wasn't a rock, at least not in truth. But if it wasn't a rock, then what was it supposed to be? It was a question that dwelled on her mind, even as she slowly started to reach towards her wrist...

Just as she reached towards it, a black and slippery tendril shot out and wrapped around her arm. It was fast... But it wasn't violent. No, it was gentle in its own way. That was the only way she could explain the way that it was able to push in through her barrier. "What... Are you?" She had to ask aloud, even though she didn't expect an answer.

The rocky shell was swallowed up by its own contents, revealing an otherwise featureless black and slippery mass. A slime, in other words. And while it couldn't answer her question directly, it seemed to understand her. Especially since it slowly started to extend another tendril, one that was aimed towards her torso. This one seemed a little more violent, as the tip was distinctly pointier, so Shiro tried to intensify her power...

Only for a sense of sluggishness to overwhelm her. No, it wasn't sluggishness. It was... It was weight. A simple look at her arm, and she could immediately see it bloat out with fat. All thanks to the tendril that was wrapped around her. It was... It was pumping itself into her. She had to stop it, and yet...

Shiro let out a moan as having her concentration broken meant that she couldn't stop the tendril that was heading towards her stomach from embedding itself in her navel. And once it had made contact, she could very audibly hear something being pumped into her. All while her gut quickly started to push outward, as if she was visibly forced to... Forced to...

Her mind was drifting the more she was being pumped full of that stuff. As if she was being stuffed into the same sort of substance. A substance that wrapped around her mind and wrapped so tightly around her that it felt like she was stuffed into a big warm bath. It was like she was submerged and kept at just the right level to avoid drowning, while still being utterly overpowered by the soothing sensation.

All while her body grew bigger and bigger before her very eyes. Her arms grew from slim and dainty to thick and unwieldy. Her legs went from thin and elegant to wide and squishy. And the less she could think about her midsection sloshing around thanks to all that was being pumped into her, the better.

Shiro tried to fight back against it all. But all she could do was moan as a bit of that same substance started to pour out of her mouth. All while she tried to look down and... and...

The substance was gone. And her stomach was now at least fifty percent of her total body mass. All while it sloshed around. All while it continued to weigh her down. And all while it seemed to fill her with a different sense of heat. She... No, she had to do her best to ignore this heat. This heat was one that would just render her completely unable to do anything.

But she couldn't fight back. The sensation spread, and she felt something deep within slowly take form. All while the black substance that had drooled out of her mouth slowly started to merge with her face, forming a hood that would obscure her identity. Shutting it away, all while the rest of her body took on the same slippery and black look as the slime itself.

Once Shiro was shut away by the slime, there was nothing left but an oversized slimy humanoid with no eyes. But not to worry, two appeared. One where the slime had been merging with her stomach, and a single purple eye across her face. All while it slowly but surely started to sink back into her, making it seem like she had just gained a lot of weight. Just a completely ordinary problem that she would have to deal with on her own...

A problem that would serve as subterfuge for the Symbiote, so it could get closer to the other heroes of this world...

---

Araya Akane was a girl that had seen a lot. As the one that kickstarted the new Natura Couleur thanks to the machinations of her former benefactor, she had to personally recruit over half of her allies. And that means that she saw a lot of different enemies and a lot of different problems that served to try and control them and twisted them against the side of good.

What she had not seen before was somebody that weighed three times their original weight. And considering that very same somebody was her friend Shiro, who was now idly standing right outside her door waiting for her to answer, what was she supposed to do? She couldn't just point it out, that'd be awfully rude. But at the same time she didn't want Shiro to walk around looking like she was about to keel over and get broken thanks to her weight. That would just be an awful thing for a friend to do. So...

"You doing alright, Shiro?" Akane asked as she stepped outside to meet her friend, scratching the back of her head as she gazed at the sheer size of her fellow heroine. Good grief, how did she pack on all of that weight? She looked like she was about to... Well, spill all of her fat all over the ground. Or have her clothes tear, how were she able to fit in her dress like this..?

Shiro smiled and softly chuckled. "I'm doing great, Akane. Here, why don't you try and feel this?" She didn't seem bothered by her friend's concern. If anything, it just excited her. Evident by the blush and the way that her fat jiggled. All while Akane remained blissfully unaware of what was about to happen to her.

Akane had to admit that she did kind of want to touch her. She didn't have a thing for fatties, but she was always curious as to what it felt like to have a belly that big. The belly and the rest of the flab really served to catch her interest, as she slowly started to reach forward...

Only for Shiro to preempt her and grab her by the back, hugging her and pushing her into her flab. All while she let out a very gentle and loving chuckle. It felt really nice to have Akane rubbing up against her, but that wasn't why she felt good. No, the reason was much simpler...

"S-Shiro, no need to squeeze me so tightly..." Akane said, though as she spoke it felt like she was getting a lot more sluggish. Like... Something was pumping into her..? At least it felt that way, she just wasn't able to really tell what was going on. It was like something was weighing her down. Something like... that big belly that started pushing out...

The redheaded girl's eyes started to widen once she noticed that. She was growing. And the cause of that growth was some sort of tendril that was stretching out from Shiro's navel. But no matter what she tried to do, she couldn't pry herself away. Not just because Shiro was strong enough to keep her pinned, but because it was like she was getting weaker with every moment that passed. As if... As if...

Slowly but surely, Akane's eyes dimmed as a bit of black drool ran down her chin. Her ability to think was diminishing. Her body was growing big, just like her friend's. And all she could do was just stand there. All while the Symbiote made itself nice and cozy inside her. All while it just made a good home out of her.

She was one of the strongest heroes that Equilibre had ever seen. And here she was. Getting stuffed full like a turkey, all thanks to some alien substance that had plans for her and her friends. She just stood there with a blissful look on her face while she kept drooling.

And just like what had happened to her friend, a new feeling emerged within the depths of her stomach. She could feel... A flame of life being turned on inside of her womb. It had managed to get all the way in there..?

Akane didn't get to dwell on it for long before her body turned just as black as Shiro's had, with her face and her individuality swallowed just like her friend's had been. And just like Shiro, her face and body returned to normal moments later, with a blissful and foreboding smile now on her face.

She knew what to do to continue the Symbiote's plan... And to keep its breeding grounds as full as they needed to be...

---

"You two..!"

The next on the Symbiote's list was the brains of the Natura Couleur. And unlike the subtle approach, it needed to make sure that she didn't have a chance to fight back and alert the others.

Which was why Kido Mana, the green-haired short girl that served as the most intelligent member of the team, was currently pressed between the two bellies that served as hosts for the Symbiote.

"Just hold still, Mana..." Shiro chimed, as the black and slimy substance emerged once again, turning her into a simple one-eyed breeder drone. She didn't need to use her identity to take care of this girl. Not while she was assaulting her in this fashion.

"You'll feel so much better when you're just as full as we are..." Akane said as well, right as she was swallowed in the same fashion. Only a purple and leery eye could now gaze down at her much smaller friend. One that was currently stuck in between two squishy yet incredibly large mounds, preventing her from making any sort of escape. All while both of the two drones giggled and let their flabbened bodies jiggle...

Though, it wasn't the fact that she was trapped that made the experience so unpleasant. No, it was the way that the Symbiote was making their slimy bodies extend outward. And fill both of Mana's holes in the process. Pumping those tendrils deeper and deeper into her, to make sure that it was utterly impossible for her to get out of this. If she managed to squeeze out of the squishy prison, she would still be impaled upon the two tendrils.

"Open your damn eyes..!" Mana cried out as she tried to struggle against it. The discomfort of being pressed by two slimy bellies. The pleasure of being pierced into by those tendrils. And... The growing sense of bliss that filled her, the more she felt those tendrils pumping into her.

They weren't idle in the slightest. They were taking advantage of every moment that they had. Making sure that she was utterly and completely unable to get out of her role as another breeder drone. She could feel her head being filled with all sorts of suffocating vibes, all while she felt her womb and her stomach being stuffed at the same time.

No, it wasn't her stomach being stuffed. She could feel the substance merging with her body as soon as it poured free from that tendril. Every little part of her body was being altered on an internal level. She wasn't becoming fat, because that wasn't the nature of the slime that was merging with her. It was more like... Inner padding, designed to seem fat while really just being layers upon layers of protective tissue.

At least, that was what she was able to piece together while she was still able to use her mental facilities. An act that became harder and harder as she was being pumped full of more and more of that sludge. Her body was growing and growing, and her skin's hue was turning the same kind of dark as the two drones that were pinning her like this. What was she supposed to do..?

...That's right. Mana shouldn't do anything. She was foolish for thinking she should be doing anything. As her body reached max capacity, the Symbiote managed to completely suppress her mind and make her believe what it wanted her to believe. And it wanted her to be in bliss. It wanted her to just give in and accept that nothing bad was going to happen. Nothing bad at all...

The exact same thing that had happened to Akane and Shiro happened to her. As soon as she gave into the bliss and the Symbiote's offspring had rooted themselves into her womb, converting her into another breeding bed for it to procreate through, the black substance moved across her face and made her lose all sense of individuality. Only when the Symbiote believed that she should use it to continue employing elements of subterfuge did her face come back out...

And as her green-eyed face reemerged, her next target came to mind. Ah yes... This one would require a forceful hand as well...

---

"Vert! Come to your senses!"

Natura Bleu, Eguchi Aoi, was faced with quite the difficult challenge. One of her dear friends, Natura Vert, had shown up out of the blue. Not only that, but she was absolutely slathered in this black substance that made her look so much fatter than she really was. And to top it all off, it was clear that something was controlling her. All thanks to that big purple eye that was gazing at her from the oversized girl's belly button...

"I am completely in control of myself, Aoi..." Mana giggled as she slowly rubbed her stomach, all while several tendrils sprouted from her body. "But you seem like you need a little help. You need to be just as big as me..." She muttered, in such a distinctly different kind of tone. The usual know-it-all and bratty tone was gone, replaced with an obsessive and almost maternal tone that felt so out of place.

Aoi grit her teeth as she spawned a pair of her blades, before tossing them into the air as she shattered them and turned them into bullets made of water. "I'll wash it all away! BLEU BULLET!" She shouted as those watery shards shot forth with a ferocity that was almost completely unmatched by any of her allies. When she got mad like this, there was nobody that would be able to temper the incoming waves.

While Mana was certainly big and strong in ways that differed from her usual ability set, that didn't mean she was equipped to defend against such an assault. Each of those 'bullets' slammed into her and quickly toppled her over, causing all of the flab to jiggle around while the black substance seemingly retracted. All while she gasped and panted, like she was actually left over encumbered by it all...

Aoi breathed a sigh of relief. And she stepped closer, all while slowly letting several large droplets of water pour down from her fingertips. "Just sit tight. I'll wash it all off you. And I'll wash your body out as much as I can, to try and see if you can't get any smaller." She said, hoping that she hadn't suddenly gained permanent weight. Or hell, that the weight wasn't the result of one of her friend's illusions being undone.

But as she was letting that water drip down, she was neglecting one of the most important aspects of the Symbiote. It was made of liquid. And the more water that was available on the ground, where some of the Symbiote had landed after it had been rather violently shot off the oversized heroine's body, the more it could soak up and prepare itself.

Mana coughed a little as she glared at her own size. "Thanks, Aoi..." She muttered, all while slowly looking at the overly large black form that started to tower over her friend. All while she cracked a smile that seemed as bratty as ever. "Thanks for being so stupid."

Aoi's eyes widened right at that moment, before the reformed Symbiote slammed down on her and immediately sunk into her body. It was impossible for her to try and endure, because it had already regained such an immense amount of mass that it just overwhelmed her on every front. Every little bit of her body being filled, practically drowning her inside of it.

By the time it had properly enveloped her, it slowly but surely started to give way to her form. A form that was so much bigger than all the other Natura. A body that was so flabby that she could barely stand, and yet the look on her face made it clear that it didn't bother her.

No, she was beyond blissful after being forced to endure something like that. She felt like she was wrapped up by several potent and extra plush pillows, making it hard to think and hard to do anything. Which meant that even though she was able to keep conscious on some level, she couldn't stop herself from handing over the controls to the Symbiote. She was a prisoner in her own body, and she loved every moment of it.

'Aoi' smiled as her face was quickly swallowed by the Symbiote, its eerie eye staring forward as the slime slowly sank back in. All because she knew she didn't have to try and be stealthy. Not when most of the Natura had been conquered. Not when her womb was beyond filled, ensuring that the Symbiote would be able to continue replicating itself on this world, even if she was left as the only one that could host it.

And if the other two had done a good job, then there would be very few heroines left for it to fill...

---

"Hold on! Don't give into that stuff!"

Shirai Kohana, Natura Blanc, had been up rather late. Who could blame her? She had been playing games with her friend all night, so of course she was sleepy. So why did all the bad stuff have to happen on a day when she was beyond sleepy?

Even though she was rendered almost a little too incapable of carrying out her duty thanks to the sluggish feeling of exhaustion weighing down on her, she wasn't about to give up. Not when there were people that were suffering. And thanks to her healing ability, she was able to purge the people that had been hurt by that black stuff that was creeping around town. It was really weird how she hadn't seen her friends, but she was sure that they had their hands full dealing with the gunk. So she just had to focus on healing.

It definitely seemed like healing worked too, because the substance just pooled away and turned into a white cream as soon as it was purged from the victims' bodies. They even got all nice and thin like before. Which made her breathe a sigh of relief, she wasn't sure how she was going to break it to them if it ended up actually leaving them permanently fat...

Kohana wiped a bit of sweat off her brow as she moved onto the next one. A really big fatty. One that was actually like the size of a living room. She wasn't sure how the person had managed to grow that big, but she wasn't about to give up just because she was huge. She was going to help her. No matter what.

"Okay. Just try to stay calm. You won't get hurt when I heal you, but that stuff might try and writhe around inside you." The white-haired and dark-skinned girl said as she slowly put her hand on the oversized fatty's belly, slowly letting her healing power pour into her. She was going to make sure that she ended up in pristine condition. All so that she could return to a nice and cozy and happy life.

The black stuff slowly started to melt off the oversized fatty, especially the stuff that was wrapped around her face. And when it did, Kohana's eyes widened in shock. The fatty wasn't just another citizen. No, she was one of her dear friends... In fact, she was the friend that had been playing games with her last night!

"Kiko!?" Kohana cried out as her concentration was broken for just a moment, all while all of that 'melted' slime pooled down at her feet. Of course she'd be shocked, there's no way that she wouldn't be shocked at the sight of her friend having grown so huge and being controlled by this weird stuff!

But thanks to that shock rushing through her, the Symbiote was able to latch onto her. Not just her body either, it was able to latch onto her power. Using it to heal itself. Which in turn caused it to spread further and further through Kohana, as if they were being merged on a fundamental level. And unlike most of the other members of Natura Couleur, it was going to be practically impossible to pull the two apart after this. That was the nature of Kohana's power...

And why she let out a powerful moan as she explosively gained weight in a matter of seconds. The sheer amount of healing was far beyond what she was usually capable of, and her figure paid the price. All while her cheeks puffed out and her body grew heavier and heavier. All while she desperately tried to look towards the black-haired girl that had been serving as the Symbiote's host...

Kiko just grinned back at her. She had been awake the entire time, and she was delighted to see her friend get consumed and merged with the Symbiote. Her grin only stopped as her face was swallowed by the Symbiote, rendering her another one-eyed Breeder Drone, one that was stuffed so much that it was utterly impossible for her to move. Not that she needed to. Not when she could give birth at any moment.

And that very same sensation started to spread through Kohana, as she laid down and prepared herself to fill the same role as her dear Kiko...

---

With every member of the Natura that fell to the Symbiotes and their ability to merge with their bodies, rendering them so heavy that they looked like they could barely move, the girl that they were all protecting felt the backlash. And as a result...

"N-No more..." Eclipse muttered as she laid in the middle of the Natura Couleur base. All while her skin had already taken on the same sort of black shade as the rest of the Breeding Drones. Even though she hadn't been infected by the Symbiote, she could almost feel it writhing around under her skin. She didn't like the experience. She didn't like any part of it. And yet she couldn't do a thing to stop it. Her connection to the Natura meant that she was subject to a lot of their strengths and a lot of their weaknesses. And this was definitely one of the moments where she was at her weakest.

The two-toned girl weakly tried to get up, only to hear the sound of steps approaching. And she felt her heart sink, because she could recognize those steps. Not just because of how wet they were and how much they made the ground underneath her shake and rumble. But because of the soft giggles that followed them, as one by one the figures that she dreaded made their appearance.

All six members of Natura Couleur. Twisted into fattened and almost identical forms. Each of them adorned with an eye on their slime-covered faces, each of them adorned with an eye that peered forth from their bellies. And it wasn't hard to notice the way that their bellies thrashed and squirmed. There was something hidden within. Something that was just waiting to be unleashed. She didn't want to acknowledge it...

Especially not as looking at them made her feel that very same sensation spread through her. "S-Stop... L-Let go of them..." Eclipse muttered as the tears ran down her face, all while she was forced to slowly get up onto her knees. All thanks to the way that her belly started to push outward.

It wasn't because she was getting fat. No, the reason she was growing was because of the connection between her and the Natura. It was because their wombs had been transformed into factories for the Symbiote to reproduce through. It was why she couldn't stop herself from moaning as she grew bigger and bigger, and her body pushed out further and further.

The Symbiote didn't need to do anything. It had already conquered her by conquering her allies. The connection meant that she was being transformed into a Breeding Drone right then and there. Her black and white colors gave way to the same uniform and slimy shade of black that characterized all of the other girls...

Eclipse cried out in pure pleasure. All while her body grew bigger and bigger. All while her womb filled with more and more life. She could feel it all. She hated it. She loathed it. She really just wanted it to go away. But there was literally nothing she could do to stop it. All she could do was just...

Her eyes widened. And slowly, a blissful smile appeared on her face. That's right. The only thing she could do was give in. Ah... Seeing all of her fellow drones just lined up like that... It made her envious. It made her wish to join in. It made her wish that she could be just like them...

And her wish was granted. As her will was broken and subverted by the intense bliss, Eclipse's face was swallowed just like theirs were. Leaving her covered from head to toe in the same sticky black slime, where an eye slowly formed where her face had been. All while that same eye then formed on her belly, leaving her identical to all of the other Breeding Drones...

The seven Breeding Drones stared at each other with their matching eyes, and the eyes on their bellies slowly closed. Only to then reopen with a heart in the middle, as all of them put their hands behind their heads, or at least attempted to do so with how flabby their limbs had gotten.

Moan upon moan rung out through the base. All while the seven of them squatted down and did their very best to push. Not to get rid of anything that would help them regain their weight. But to ensure that they fulfilled the need that the Symbiote had implanted within them.

As they pushed, the floodgates opened. A stream of icky and shiny black goop poured out from their pussies, completely swallowing the floor as each of them were made to cry out again and again in an attempt to keep up with their pleasure. But none of them could keep up. One by one, they each fell onto their backs, with the stream of pure goop still pouring out.

And once the goop stopped flooding outward, it all started to coalesce. All of it gathering into the form of one large mass that slowly started to float off the ground. A single orb-shaped mass that opened to reveal another one of those purple eyes, which now gazed upon the Breeding Drones that it had amassed...

This was the true form of the Symbiote. A creature exiled from its own world for doing this exact same thing to much of the female population. Only one little version of it remained, and that would've been the end of it. But thanks to these lovely girls that had enough power for it to feed on, it was able to reclaim its original form and then some...

And as all of its Breeding Drones saluted, their jiggly bodies continuing to leave them perfect for continued 'mass production', the Symbiote's eye started to curve upward in delight. All because it had managed to accomplish everything it wanted to.

...But why should it stop with a mere team of cuties, when there was a whole world to bond with..?