[Mental Regression, Diaper Use, Hyper Soiling]

Equilibre was at peace. The Darkness that had been hounding it for so long, and the Light that wanted to choke it out and control it all on its own, both had been put to rest and any further conflict would be a pipe dream. Which meant that the Natura Couleur, the girls that had managed to save the day, had accomplished what they set out to do.

"Why on Earth am I the one babysitting!?"

"Because you're home most of the day anyway, Mana. The least you could do is try and take care of Éclipse while she's still trying to recover from everything."

"I-I apologize, Mana. I really don't intend to be a problem."

"You're not! But it's still frustrating to be doing this!"

Unfortunately for Natura Vert, alias Kido Mana, there were still a few tasks that heroes like them were supposed to solve. Especially tasks that involved their own allies. This was the case for Éclipse, the fusion between the Light, Lumiere, and the Dark, Tenebris. Though this fusion represented their victory, it was still rather unnatural, which resulted in a lot of problems that came with the unstable nature of it all.

And it fell to her, as the member that stayed back at base most of all, to take care of things. Because otherwise the problems that still sprung up around the city would go un-resolved, and they'd end up overwhelmed by the Monsters that would no doubt try to aim for their complete and utter destruction. Which meant that she had to just suck it up and endure.

"Why can't a fusion like that just go well?" Mana muttered as she sat on the couch in the Natura base's living room, sighing and narrowing her eyes as she looked towards the much older looking woman that currently sat on the same couch, except she happened to be dressed in clothes that totally didn't fit her age.

Èclipse, due to her nature as an unstable fusion, was a lot older than she looked. She was barely a few weeks old at this point, and exhibited a lot of the same growing traits that infants did. In her case, it primarily revolved around her complete and utter lack of potty training. Which was why she was currently wearing an obnoxiously thick diaper that should hopefully make it impossible for her to leak. And thanks to the kind suggestions from Natura Arc and Blanc, she was also dressed in a onesie that was half themed after the sun and half themed after the moon, which went well with her hair being split down the middle and colored white on one side while black on the other.

The older woman currently dressed like an oversized infant trembled a bit. Even if Mana meant nothing bad with her scalding words, that didn't mean she was ready to take them head on. "I-It's just... It's just the after effects of all of that. I'll learn to control it. E-eventually." She muttered, all while unable to squeeze her legs together due to the sheer size of that diaper hidden underneath her onesie. "...T-Thanks, Mana. Thank you for being here to watch over me."

"I don't like it. But I wouldn't want you to feel lonely." Mana huffed, blushing a bit. She was a brat at heart, but she had learned that she didn't want to abandon her companions. Even one born from the two women that had tormented her while she was still growing into the role.

Éclipse smiled, as she slowly but surely shuffled closer to the much smaller and green-haired girl. "W-Well, uhm, would you like to do anything while we wait for everyone to come home?" She asked, her eyes looking awfully innocent as she looked down at the much smaller girl. "I-I think I can hold it. I-If that's what you're concerned about."

"I'd play games with you, Éclipse, but I'm literally too good for you. If I play against you, you will keep losing over and over and over. And then you'll get frustrated, and then you'll lose yourself in that frustration and cause a mess." Mana explained with a less than pleased expression on her face. "I can teach you to get better. But only after we've gotten you pottytrained. I'm not about to clean a diaper just because a baby threw a tantrum."

Éclipse shivered a little as she heard those words. They were harsh. But she knew it was just how Mana talked. She didn't mean most of it. It was just... It was just... O-Oh no...

The older woman let out a weak whimper as her body couldn't keep itself in check, all because of her unstable emotions. Which caused her to audibly let out a rather gassy and obnoxiously stinky *braaaaaaap* as her poor bowels were emptied right into the seat of her diaper. Letting that thing sag rather impressively as it wasn't just a little mess, it was a mess that would make her unable to truly move from her spot on the couch, which only served to fuel her with even more embarrassment as her cheeks flushed as brightly red as they possibly could.

Mana snapped her fingers as a veil of her own windy power covered her, causing her to avoid the dangers of inhaling any of her maternally-bodied baby's fumes. "Sorry." She muttered. Because she knew it was her fault that she ended up making a mess. "All I really want, right now, is for everything to be over. And if that comes quicker because we're talking, then that's how it'll be. We'll figure out something regarding that diaper of yours later, I just... I just want to sit and wait here for a bit, alright?"

Éclipse nodded, shivering and trembling as she tried not to cry. It was really hard. Especially since it felt like she had just done something really bad. And it wasn't just because she had messed herself. No, it was like Mana didn't want to be there with her. And she knew that wasn't true, but her heart was such a messy thing that it went for the worst interpretations without even considering the alternatives.

Really, it was all because of her body. If her body wasn't such a sensitive thing that would cause problems at a moment's notice due to the unstable nature, then she would be able to live a happy life alongside the girls that had given her this chance. It was really frustrating. Not just for them but for her as well. It made her feel like she was even less than nothing. She was an active detriment...

But then a thought started to slide into her mind. A thought that seemed a little suspicious. If she had problems, then why shouldn't they have problems too? Then they could all live happily without problems, because those problems were just a part of their normal day. But how would she cause that? And should she really cause that?

A look towards Mana was all that it took to reaffirm it in her mind. Yes. This would be for the best. And besides, it wasn't like it was going to be too difficult to make any adjustments to her friends. Because she had a lot of power still inside her. Even with all the power that forced her to mess herself, it wouldn't be too difficult...

Mana stared out of the window. Quietly yawning a little. This duty was taking its toll on her. Not just because she had to keep her powers active to avoid getting a faceful of stink, but because she really didn't like doing it in the first place. She didn't have good kid skills. Especially not when that proverbial kid was so much older than her by technicality. If anything, she just thought about her Mom when she looked at Éclipse. Thinking about how she had run away from her, thinking about-

She didn't get to dwell on her Mom for too much longer before she was suddenly pinned against the armrest, courtesy of one incredibly stinky butt that now rested against her face. Something that caused her to struggle and tremble and try to kick around. "Éclipse! Get off me! Sitting on me isn't a game!"

"It's okay, Mana!" Éclipse giggled as she pushed that bottom riiiight up against her face. Not listening to her pleas to make her stop. "I figured it out. I don't need to worry about training if you're all as bad at keeping it in as I am!" She giggled again, no real malice in her voice. She genuinely thought this would be the best idea. Even if it resulted in six adults also losing their continence and ending up just as badly incontinent as her.

Mana tried to shake her off. She even tried to stop her by using her powers to push her away. But all that happened when she used her powers was for them to suddenly vanish, only for her to end up wearing a green windy-themed onesie with a couple of infantilizing mittens covering her hands. Not only that, but she could very definitely feel one big diaper wrapped around her butt, which only served to make her feel more frustrated.

"Stop it!" Mana cried out, as she tried to pelt that padded posterior with her punches. But it was too stinky, too thick and way too soft for her to really inflict any damage. Especially with those mittens making her hands even softer than they already were. She didn't want this, damnit!

Not that she had a choice. Éclipse might have an unstable body, but that instability was giving her a lot of power. It was how she had turned Mana's powers into fuel for her onesie and her diaper, and it was how she was able to push the girl all the way down onto her back before puffing up her cheeks and pushing on her bowels as much as possible.

While a proper fart didn't squeeze out from her cheeks this time, a mess sure did. And that mess wasn't going to be delightfully contained inside the diaper. No, it was causing the diaper to expand outward very rapidly as it practically swallowed the much smaller heroine whole. Not only that, but it also managed to burst open the buttons on Éclipse's onesie so it would be even less impeded, the thoroughly soiled pamper spreading out as far as it could possibly go.

Mana tried to resist. But the sheer scale of that mess was more than she could handle. Not just physically, but mentally. As the massive mess weighed down on her, it was like it was pushing out everything inside her head. Replacing it with very little except for the sensation of the mess on top of her. Which made it extremely easy for her mind to replicate that same feat, as her body instinctively started pushing.

The green-haired girl's bottom quickly expanded, or at least that's what it looked like before her onesie also popped open near the rear as her diaper grew and grew. She was filling it with lots of things. Her responsibilities, her toilet training, some measures of her adult self, everything that she definitely didn't need in the eyes of the matronly baby that was currently busy burying her underneath her diapered butt.

As Mana lost more and more of herself, more and more drool poured out of her mouth. All while she was stuck underneath that stinky, nice, super squishy and defintiely warm and huggable pamp. Just like the one that was keeping her legs and her waist super warm too. It felt really nice to be extra stinky and extra poopy, because it meant that you were extra warm and stuff. It was something that she really liked, so much so that she wanted to share that feeling...

"Poopy..." The thoroughly drained Natura muttered, the word only unmuffled once her older companion managed to pull herself off her, revealing the sheer delight on Mana's face as she continued to push out more and more of that mess, the two quickly taking up all the space inside the Natura base's living room...

Éclipse giggled as she looked down at her thoroughly pooped friend, which only served to affirm that she needed to help make the others just as poopy...

But until they came home, they could just keep enjoying themselves and making their messes bigger...

---

"Éclipse! Mana! We're home! Hope everything's gone alright!"

Natura Rouge, alias Araya Akane, cried out as she went into the Natura base with a smile on her face. Sure, she had to be the one to force Mana to be a babysitter for a bit, but she was certain she could handle it.

"Of course it has. As much as she complains, Mana's reliable." Natura Bleu, alias Eguchi Aoi, said with a soft smile on her face. Following right behind her leader, hoping that she wasn't wrong and they didn't need to clean the entire base.

"She's strong, in her own way. Though Kiko could use a bit of that strength, ehehe..." Natura Blanc, Shirai Kohana, giggled a little as she skipped inside while being right at her partner's side.

"Hey, if it means I'd end up a brat, then I'll pass on that strength." Natura Noir, Sakurai Kiko, chuckled a bit in turn. Though she was strong, she wasn't immune to a bit of banter being thrown back and forth.

Their final member sniffed the air as she stepped inside. "Guys? Do you smell that?" Natura Arc, Shima Shiro, spoke up as she brushed a hand through her delicate red hair. Something about this smell felt... wrong. Like it wasn't supposed to be there. And it wasn't just because it smelled like poopy. Because she had been on Éclipse changing duty prior to this excursion.

As the five members of Natura Couleur made their way into the living room, each of them were met with the shocking sight of what had happened while they were away. And honestly, the only one of them that was prepared in any way was Shiro, who just let out a soft yet disappointed chuckle.

There Éclipse and Mana were. Sitting on their extremely padded butts. Sitting in their incredibly stinky messes. Without a care in the world. Without really worrying too much about who watched them indulge like this. They were like two overgrown babies, and they were happy to be that way. Especially as Mana was currently busy nursing from Éclipse's maternal mounds, drinking lots and lots of milk from them.

Éclipse smiled softly, before she noticed her spectators. Then her smile grew. "Poopy!" She giggled, as her powers suddenly exploded in the form of her diaper growing another few inches, smashing against the wall in the process.

None of the Natura were ready for this wave of power washing over them, none of them were ready to suddenly get dressed in matching onesies and equally matching diapers. And none of them were ready to resist the intense feeling inside their respective stomachs.

Akane certainly tried. But even her Courage couldn't stand up to the need to fill her diaper with poopy, the redheaded girl trembling as a pacifier appeared in her mouth while she just pushed it all out. It felt really good, so good that she collapsed and used her diaper as a chair much like Éclipse and Mana were...

Aoi was a girl filled with Determination. But even Determination couldn't hold out against the feeling in her stomach. Just like Akane, she was forcibly pacified and forced to fill her nappy, though hers ended up a lot wetter because she ended up peeing herself just as much as she went poopy in it, which made her seat extra squishy.

Kohana was physically strong and a good supportive member of the team. But she wasn't able to resist, immediately giggling as the feeling overwhelmed her and a pacifier appeared in her mouth. If anything, she eagerly pushed as her diaper started to sag beneath her legs, waddling closer to Kiko before she couldn't take another step and then letting it all push out further and further.

Kiko was even stronger than Kohana. Which was why the urge inside her stomach forced her to push even harder than anybody else. Which just caused her to double over and fall onto all fours, trembling and pushing harder and harder like an animal who just needed to mark her territory. Something that resulted in the onesie-clad girl rubbing her face up against Kohana's diaper thanks to nothing but her instinct.

Finally, Shiro did her very best to try and stop herself from messing. And as she only slightly messed herself, causing the buttons on her onesie to pop and let her diaper sag a little, she could breathe a sigh of relief... Only for drool to pour down her chin as her connection to her allies caused her brain to fry itself completely with the delight of going poopy, causing her diaper to explosively grow outward as she was swallowed by the bliss of it all.

In a matter of mere moments, thanks to the excessive powers that Éclipse had at her disposal, every single member of Natura Couleur, whether it was the leader or the latest one to join, had managed to make their diapers grow to obnoxious sizes thanks to everything that they had pushed into them. There was not a single chance for them to regain control after all of that, so even if they managed to recover their minds, they'd be just as helpless without a diaper as she was.

And yes, she'd have to take a lot of scolding from the more responsible members of the team after everything was said and done. But if it meant that she wouldn't trouble them with her poopies, then it was all okay in the end.

Éclipse smiled and pushed a little more herself, giggling as she watched all of her poopy-minded friends enjoy themselves, all while continuing to breastfeed Mana. Until they all recovered, she would have to take care of them. As the oldest in the room.

As Natura Mommy.