[ABDL, Diaper use, Soiling, Wetting (Panties), Mind Break]

"Lusty..! Lemme go! Lemme see Onee-chan!"

A young voice cried out from within the deepest halls of the naval base, protesting against her current predicament. Namely the fact she was being held within a much older woman's arms, a woman that seemed a little too pleased with the way she was protesting.

"Oh, but Unicorn... You've made a mess, you know?" The older and white-haired woman, the Carrier Illustrious, smiled as she looked down on the purple-haired girl in her arms. "You know you'd make your dearest Onee-chan awfully upset if you showed up at his door, with that running down your thigh..."

The way the older of the two carriers pointed out the younger's current predicament was enough to make the Unicorn-class Carrier shut up in mere seconds. She only managed to squeak out a defensive "I just couldn't make it to the potty in time..." As she tried to close her legs to no great effect.

Despite the attempt to stay pure and precious, it was easy for the elder to tell what was wrong. The wet feeling of something slowly caressing her skin was all she needed, after all. Just a mere glance down at the smaller girl and the wet spot in her panties was more than visible.

Plain and simple, Unicorn had managed to wet herself in her sleep. And it wasn't the first time either. After the last few nights of having woken up with either her underwear full of filth or drenched beyond repair, enough was enough. Illustrious had to step in, just like she had done many times before.

"You really are lucky, Unicorn. We can fix your potty problem and ensure that you won't embarrass yourself in front of 'Onee-chan', in one fell swoop. You just have to sit still, and everything will be alright." The white-haired Carrier smiled as she gently rocked the younger girl back and forth while carrying her to the end of the hall, into the familiar scenery.

The pastel wonderland that all the babies in the navy had ended up in. With all of the colors of the rainbow plastered all around the spacious nursery, complete with unforgivingly bright shades to all of it, to make it that much more fit for infants that couldn't resist the garish way everything blended together.

Unicorn looked around for a bit with the blush of utter embarrassment still covering her cheeks. It was... well, to say that she didn't like it was an understatement. She liked being her Admiral's little sister, but she didn't like it going this far..!

"L-Lusty... I'm not a baby..." She muttered defensively one more time, only to find a finger on her lips that shut her up.

Illustrious smiled, refusing to answer the little girl. Intentionally, since she had plans in mind. Awful plans, once that would result in the child-like Carrier never being the same.

The first step was to get her properly changed into attire that could help her with the accidents she had been experiencing. The kinds that kept her soundly sleeping, despite the fact she should be trying to get to the potty. The exact type of issue that would warrant an older girl wearing diapers, the stuff only infants should wear.

Unicorn tried briefly to struggle against the white-haired mature woman's grasp, but it was a futile effort. She couldn't work up the strength to get free from her tight grip, nor the willpower to run back out the corridor that they had gone down. She didn't want to be seen with pee still running down her thigh after all...

"You really should just try to relax, Unicorn. If you were like a proper little baby, everything would be much smoother. You'd get changed, you could get a nice and cute little outfit that your 'Onee-chan' would praise, and then you could move on with your duties. Doesn't that sound so nice and easy?" Illustrious tried to both downplay the age of the purple-haired girl, while at the same time trying to make the diapers sound just a little more enticing.

An effort that seemed to be worthless, given the way the younger Carrier crossed her arms and refused to look her elder in the eye. At least she calmed down and stopped struggling...

The older Carrier took this as a good sign, as she slowly stripped the younger girl's underwear off her crotch and down her thighs. Once that was out of the way, she gently peeled up the dress that her baby-to-be wore, giving her more room to work with.

Now that she had enough space, cleaning the little girl was a cinch. A little wipe between the cheeks, a rub or three on the thighs, and a bit of drying around the untouched and youthful crotch. All of it necessary to ensure that she'd stay dry, at least before the diaper would come on. Then she could get as dirty as she'd like.

It didn't take much for Unicorn to feel just the slightest bit uncomfortable however, as the smile from Illustrious got more and more imposing. The way she just touched all of her private areas like it was no big deal, and the way she wiped her clean all over, making her body tingle in all those weird ways... She didn't like it. But she didn't speak up, instead, she refused to look towards her 'caretaker' that much more. Stubborn little gal, that much was certain.

Once everything was nice and dry, next came the powder that would ensure that she wouldn't get a rash. Much like before, the older woman was very thorough with how she applied it. She gave the insides and the outsides of the little girl's thighs a rub-down before she moved onto the sensitive areas between them, being extra careful to apply a little around the most precious areas. Especially the little girl's poor bottom, the one that she was most interested in. She could imagine what was going to happen soon.

As Unicorn bit into her lip to try and prevent a strange cry from leaving her mouth, her 'caretaker' continued. The preparations were complete, now came the diaper itself. Decorated with a lot of cute unicorns and planes all across the white-and-blue padding, it would look even more adorable once it was firmly secured around the Carrier's waist.

The process of getting it secured was simple. First, the back of the diaper went underneath the pouty girl's bottom. Then, the middle section was weaved through her legs, like she was threading an extra-large piece of thread through a massive needle. Lastly, the front-wings that had little tapes on the side were napped onto the back-wings, firmly securing the diaper and completing the look.

"There you are. Nice and snug, isn't it? You look like a proper baby now, and you're not even wet anymore. That's progress, I'd say." The white-haired woman chuckled as she scooped the little girl up into her arms as she gently skipped towards one of the many tables dotting the playpen-like nursery, while she felt the smaller Carrier squirm in her grip. "Oh? What's the matter, Unicorn? Are you still feeling uncomfortable? Don't worry, you can tell me anything. I promise I won't tease you over it."

This time around, Unicorn wasn't squirming because she didn't want to be in the grip of a woman she didn't trust. She didn't, but it wasn' the only reason. No, this time, she could feel a pressure building within her tummy, the same kind of pressure she felt whenever she barely made it to the potty in time. Her eyes widened and she started to whine a little. "L-Lusty, please..."

Illustrious smiled as she raised her eyebrow while helping the little girl down onto one of the seats near the table. "What's the matter, dear? You're looking awfully red there... You're not about to have an accident or anything, are you?" Her words were carefully chosen since she knew why the little girl was having trouble with her stomach. The very same reason she had been having bladder troubles for the last little while.

Circulating through the purple-haired little baby-to-be was a potent laxative, designed to clear out any jams while at the same time making more for later. It was the sole cause for her bladder filling up without her knowing, and emptying not long after that. The same problem that happened to her bowels was also caused by said laxatives. An ingenious little element made by the greedy kitten that ran the shops aboard the base, but it had definitely proven its worth.

Unicorn shifted from side to side as she felt her stomach growling and groaning as her colon spread further and further, preparing her for the impending mess she would make. "L-Lusty! Please! Let me go to the potty! I don't want to use a diaper!" She shouted in desperation, only for the older girl to giggle in response...

"Why do you think I put the diaper on you, silly? That is your potty. It's okay to let it all out. Just take a deep breath, and don't focus on it. Then it'll be alright really quick, and you'll be ready for a change..." Her words were like poison, causing the younger girl to sniffle and rub away at her eyes as she couldn't stop the oncoming flood from her rear...

The little girl bit into her lip to stifle her cries as she was forced to push, to try and relieve the tension in her ass that much quicker, She closed her eyes and started to bawl just a little, while pushing as much as she possibly could, right up until she felt something disgusting slithering its way out of her hole. Something that she could do without, yet something she had grown very familiar with over the last little while.

She was pooping herself, and she couldn't control the flow or the excess of it. Her diaper quickly started to bulge backward as she tried to hide away, but those efforts just caused her to collapse onto the padded floor where her bottom stuck up into the air, where dear Illustrious could get the perfect view.

The older woman chuckled as she kneeled down and gently rubbed away at the big brown spot on the back of the girl's diaper, giggling further while the mush pushing against her palm grew bigger and stinkier by the second. She could hear the mild sobs from down below, but the flow didn't stop in the slightest. If anything, her further attempts to hide away and stop it in some fashion just made the flow intensify that much more. She was helpless to stop it, and it all just fed into the plan that the older woman had cooked up.

As the diaper sagged down just a little bit further, to the point where the bulge was actively rubbing up against the smaller carrier's thighs, the flow finally stopped. Now, Unicorn was saddled with the harsh truth that not only had she just messed herself in front of another person, but she had also done it in such an infantile garment...

The tears continued to stream down the smaller Carrier's cheeks, only for the little girl to be hoisted up onto the seat that she had previously occupied, simultaneously causing the mess to spread around on her lower cheeks and intensifying the waterfall of sadness caressing her face. "W-Why couldn't you just let me... Why won't you let me see Onee-chan..." She muttered helplessly, only for the older woman to smile.

"Because babies don't use the potty. And you're clearly a baby, otherwise, you wouldn't have used the diaper. Am I wrong?" Illustrious chimed, using flawless logic as she gently wiped the tears off the smaller girl's face...

"T-That's... That's not right at all! I want Onee-chan, she knows that I'm not a baby!" She tried to argue, only for somebody to giggle from behind her.

Upon looking behind her, she saw Cygnet in all of her white-haired glory, dressed from head to toe in a onesie that made her look almost as infantile as the baby in front of her with the padded bottom. Especially since it was easy to tell that she was just as padded as the crying Carrier. "Of course it is, you're a baby, Unicorn. You just haven't accepted it yet, as we have."

The little girl was shocked, but as she tried to speak up, she suddenly found her head imprisoned between the older woman's breasts, that infernal giggle ringing throughout her ears.

"You're a baby, Unicorn. But that's okay. Babies are good girls. You're a good girl, especially for your Onee-chan, aren't you?"

Illustrious' words bounced around in Unicorn's head, and before she had a chance to pull herself out of the chasm of softness, she found another pair of breasts pushing up against the older woman's. Cygnet's, no doubt, as her voice started caressing the inside of her ear just the same.

"That's right, you're a good girl, aren't you? Good girls don't worry about anything and just make good messes in their diapers. Illustrious taught me that, and she's just as good and helpful as the Admiral. Maybe you just need to relax and accept it, Unicorn."

The little girl didn't want to admit that she was a good girl, at least not in this way! She was... she was...

While Unicorn was trying to keep herself together, the two conspiring girls giggled and whispered one final thing into her ears, while she was far too vulnerable...

"After all, like this, you're good for nothing else but filling a diaper. Onee-chan doesn't need a diaper filler. You're just a baby that doesn't mean anything to him..."

That last message was the straw that broke the camel's back. The fact that she couldn't possibly be of use to her dearest Admiral, her Onee-chan... That was all that she needed to hear to completely shatter. Tears rolled down her cheeks once more, while both of the girls that had driven her to lengths that she couldn't deal with continued to hug her and comfort her in their twisted ways.

"But, being a pamper-packing little girl isn't all that bad, Unicorn. Listen, listen." Cygnet whispered as she pushed just a little hard, only for the distinct sound of crinkling to echo through the smaller girl's other ear. Enough to make the tears stop, and for the broken girl's mind to slowly glue itself together in an improper and horrid fashion, just like Cygnet's had previously...

The purple-haired girl sniffled and rubbed her cheeks up against Illustrious' chest, only to huff and push a little, causing her already heavy mess to start pushing out over the edge of her chair from the extra filth being added to the pile. An act that prompted a bit of cooing and giggling from the two horrid influences...

That willing way she pushed was enough to make the younger girl's cheeks flush a little red, as she looked up at Illustrious with a worried yet happy look in her eyes. "Did... did I pack my diaper good..?" She asked with a wavering tone, her mind still trying to comprehend if making a mess is a good thing...

"Of course you did, Unicorn. You'll fit in here in no time, once you've shown everyone here how much of a messy little baby you are..." The white-haired woman chimed as she picked up both of the padded poopers, before giving them each a kiss. "But for now, both of you need a change. I can't just have my babies packing a dirty pamper if they're trying to compete for the biggest mess."

Both of Illustrious' babies giggled, as Unicorn's fate was seemingly sealed...

---

"She's like us, you know."

Time had passed since that day, as the purple-haired onesie-clad destroyer Javelin sat together with the recently broken Unicorn, who merely tilted her head in response to what she had said. "Like... us? What do you mean, Javelin?" The padded pooper asked while taking a little sip of milk from her sippy cup.

The older of the two young girls sighed, as she pointed towards the white-haired caretaker, who was busy playing with the other three babies in the nursery. "You see how her dress is bulging out a little around the waist? Just the faintest push from what she's wearing?"

Once it had been pointed out to the Carrier, her eyes immediately widened. The woman that had taught her that it was good to make poopy... was a pamper packing pooper herself? It was unbelievable. Her eyes turned back towards her young friend, as she immediately asked her another question: "W-Well, what do we do with her if she's padded like us?"

In response, Javelin only smiled. Her plan had started to fall into place. "Don't worry, just help me out next time she tries to leave the nursery." The purple-haired destroyer explained as she took a sip from her own cup while cracking a tiny smile...

"Next time, it's her turn to see how it feels to be humiliated."