[ABDL, Mental Regression, Soiling/Wetting]

Night had fallen upon the navel base. Ever since the incident that landed Hatsuzuki in diapers, it had become quite difficult to move around at night, to ensure that nobody would befall the same fate that she had. Suzutsuki's deeds didn't go completely unnoticed after all, even if they couldn't pin down her direct involvement with the incident.

And yet despite the heightened security, the sounds of quiet footsteps making their way back to their room could still be heard, accompanied by the faint sloshing of water from an iron bucket. Somehow, someway, the white-clad destroyer had managed to do it again. She had successfully been able to inflict a number of young girls with an enema, just as she had promised her sister that she would do, in exchange for the latter keeping quiet. To think that Teruzuki was into tinier girls making a load in their undies, girls even younger than Hatsuzuki...

The thought crossing Suzutsuki's mind made her shiver as she approached the room assigned to her and her sisters. Ever since the incident, all siblings were given their own shared room, as to keep events like the ones that had transpired from happening again. Of course, it only made the white-clad destroyer's job tonight ever slightly easier, but it also meant that she had to sneak back into her own room without being detected by either the sleeping baby within, or her eldest. Thankfully, Akizuki was out doing a night skirmish, so one half was taken care of just like that.

What wasn't taken care of, was something that Suzutsuki could never possibly expect. The second she carefully opened the door, her eyes focused on the sight of the most curious case of irony that her mind could think of. Especially considering the acts that she had just gone through earlier.

What was so ironic, one might ask? Why, that would have to be Teruzuki, dressed in nothing but an oversized diaper that clung nicely to her waist and her thighs. It was much unlike the one that Hatsuzuki had been forced into, since it seemed large enough to keep several loads packed in, and then some. It was truly a peculiar sight. Suzutsuki almost wanted to speak up, but she stopped herself ahead of time by covering her mouth. Her older sister already had plenty of dirt on her, so if she tried paying her back and using this dirt, she'd likely get tattle-tailed back on...

Unfortunately, tattling was the least of her concerns in the moment, as she suddenly noticed the older girl peering straight back into her eyes, a blush covering Teruzuki's cheeks as she motioned to her sister to step inside. She... seemed furious, not aroused. Naturally, since the white-clad destroyer would love to avoid getting treated in the same fashion as her sister, she went ahead and did as her older sibling asked her to do.

Once the door was shut behind Suzutsuki, Teruzuki stepped closer as her disapproval melted into such a devious and malicious smile. "Why, I thought you were going to take much longer to stuff all of their holes full of enemas... And because of that, you've now noticed this little fetish of mine. You know what I do to people that figure out my secret without my permission, right?" Her voice sounded almost chilling. Almost as if her little sister had managed to well-and-truly get under her skin. 

Suzutsuki opened her mouth to protest, but the finger that landed on her lips quickly shut her up before she could get any meaningful words out. "Oh, don't you start saying even a little thing, dear Suzutsuki. I had planned to forgive you for turning Hatsu-tan into a baby girl, but this goes even beyond my patience. So, I think it's time for you to learn how it feels to be like her. Wouldn't you agree?" Despite the cheery tone, her words felt... wrong. It didn't feel right to be near her. And yet, Suzu couldn't take a step backwards. She had fallen into her sister's web, and it was only a matter of time...

"C-Come on, Teruzuki, knock it of-" Suzutsuki tried to speak up, but she quickly found herself cut off by a pacifier entering her mouth. She tried to spit it out as her eyes widened, but her older sister's finger kept it firmly locked it place, forcing her to quietly suckle on it as her struggles died down bit by bit.

"Sssssh, Suzu-tan. Such a tantrum is ill-befitting of a big baby like yourself. Just use your paci, and everything'll be alright." Already, Teruzuki was starting to treat her like an infant much like the rest of the base was treating Hatsuzuki at this point. Just that little bit of down talk was enough to make the white-clad destroyer start to blush from cheek to cheek.

As much as she wanted to tear out the pacifier and just tear into Teruzuki, consequences be damned, something about the sound of her mouth sucking on that fake nipple just made her... calm. Like something was erasing itself from her mind with every suck. She couldn't quite put her finger on what it was, but the way her eyes slowly started to lose their color made it clear that it was working rather efficiently.

"That's it, just like that. Suck, suck away. Until you're just as much a child as your littlest sister. The sister that you envy so much." The more she spoke, the more Teruzuki's words started to resonate with the suckling noise. It made it harder and harder for Suzutsuki to concentrate on her thoughts, and one by one they disappeared, further removing the color and shine of independence from her eyes.

A small strand of saliva started to pour down the regressing destroyer's chin. Where... was she? Who was she? She couldn't remember. All she knew is that she was suckling on her paci, and it made her feel all good inside. Even though she couldn't hold onto a single thought, she did look ahead at the girl in front of her. The sight of the girl also made her feel good, but she didn't know why...

Teruzuki chuckled as she gently pulled the pacifier from the empty-eyed destroyer's mouth, before running one of her hands through her hair as their eyes met. "That's my little baby girl. I'll have to thank Akashi for making this special little pacifier, because without it, it would've been much more difficult to deal with you. Of course, you don't understand a lick of this, do you?" The older sister giggled as she ruffled the younger girl's hair, the latter continuing to drool absentmindedly.

"Baby..." Suzutsuki muttered quietly as she nodded along, listening and trying her best to understand what her 'older sister' was saying. Not that she knew that she was her sister anymore. Teruzuki was just a nice lady that knew who she was, and she was going to take her word for it.

"That's right, little one. And it's about time for you to join your baby sisters. But first..." Teruzuki replied as she stuffed that pacifier back into her mouth, prompting the babified girl to continue her suckling routine. A routine that bit by bit grew slower and more pronounced, until...

A quiet snore, muffled by the plastic, slipped right out of Suzutsuki's mouth. Just as her sister wanted. Her regression had finished, and led her straight into a deep sleep... one that let Teruzuki do anything she wanted to her...

The perverse smile on the diapered girl's face was the last thing that Suzutsuki saw as her current self. The last thing the 'White Duckling' would perceive as a proper adult, so to speak.

---

Dawn came to the naval base, and the actions that Suzutsuki had covertly performed had an immediate effect. A natural result, given the fact that Teruzuki had coerced her into using a proper laxative as an enema instead of just plain water like the kind that she had previously used on her youngest sister.

The unfortunate girls that made up the Shimushu class were all gathered around one of the toilets, each trying their best to keep the contents of their tummies inside. They didn't want to poop their panties, not at all! They were young girls, true, but they weren't babies... well, maybe they were, but not like that!

The white-haired girl that exemplified the class rapidly hit the locked door to the bathrooms, tears slowly running down her cheeks. "Please! Please open up! We really need to use the potty! Pleaseeee!" She cried out in desperation, emphasizing every word with a strike to the wooden door with her fists, until she couldn't hit it any longer as a result of how much the strikes made her hands hurt. Her desperate sobbing just intensified as a result as she turned towards her fellow girls... and to a sight that she definitely didn't need to see.

Both of her sisters, Kunashiri and Ishigaki, were unable to keep the contents of their bellies from evacuating their bowels. The pink haired girl, usually confident, was reduced to collapsing onto her knees and quietly sobbing as her poor bottom released a crescendo of gas, a few bouts of brassy sounds accompanying the watery mush that was being deposited into the back of her formerly clean panties causing them to sag downward ever slightly. Her pitiful cries quickly grew louder as the disgustingly sloppy water ran down her stockings, discoloring them in the same fashion as her panties. To top things off, the front of her panties weren't spared either as the sound of her bladder relieving itself was quite audible to both of her sisters, discoloring the remaining white parts of her panties with a soggy yellow.

The black haired girl wasn't much better off as she collapsed against the wall, a few subtle teardrops running down her cheeks as she did her very best to try and just accept what was coming. She closed her eyes as she tried to push outward instead of holding it all in, causing a little wet fart to splurt out and preemptively stain her panties, before the load splashed right into her pre-used underwear. The sensation of the wet poop just made her feel uncomfortable, and if not for the wall supporting her, she would be in the exact same position as Kunashiri... especially as her bladder gave way as well, the golden liquid pouring down and out of her panties' leg holes, soaking right into her stockings...

Shimushu was at a loss for words. Both of her sisters had just given up, right as they were about to get the relief they were hoping for... And that loss for words left her all too vulnerable. A single gasp escaped her lips as she too was unable to hold it in any longer. She bit into her lip to prevent her cries from slipping out, but her eyes could not be stopped. The tears streamed down her eyes as she was forced to excrete straight into her pristine panties...

The three siblings were all in a state of embarrassment, and the sound of footsteps approaching certainly didn't help matters. They all dreaded that they'd be mocked for their current condition... only for a soft voice to speak up instead.

"Oh my, looks like I was a little too late. To think all the Kaibokans suffered the same issue."

The three girls turned their heads towards the source of the voice, wiping their faces clean of tears before their eyes widened in tandem at the sight of who had arrived. Immediately, their worries started to wash away, as they weren't the only ones that had an accident this morning... Because they were seeing the effects of one having taken place, right besides the girl that had started talking.

Teruzuki smiled a little while looking down at the three panty-poopers, before turning towards the girl at her side. The girl that was still suckling so eagerly and obediently on her pacifier... Suzutsuki. Like the three at their feet, her panties too were filled to the brim with poopy... the only difference between the three Kaibokans and the 'White Duckling', was the consistency of the waste in each of their panties.

"I've already checked up on the Hiburi class girls as well as the Etorufu girls. Somehow, all of you've been drugged during the night... and my dear Suzu-tan as well." Teruzuki explained as she patted the pacified girl on the back, causing her to make a pleased noise in response, the light in her eyes still dim. 

"Until the drug's out of your system, you all are to stick together to avoid cross contamination. For safety's sake, this includes Suzu-tan, so you best take good care of her." She continued, prompting the three girls to look between one another, and then at the pacified destroyer, who seemed... quite happy to have new friends. Especially after her mind had been emptied out of any previous notions.

"W-Well... What about..." Ishigaki started to speak up, before she felt the words getting stuck in her mouth. She didn't want to audibly admit that she had made a mess... but Teruzuki didn't care, evident by the way she decided to cup the black-haired girl's face and gently rub at it, making her worries slowly fade away due to the touch of a caretaker... "W...What about our panties..?"

The eldest girl out of the five present merely smiled as she revealed a bag she had slung over her shoulders, one that when it was zipped up revealed quite the supply of diapers. "With how effective the drug has been, it's also recommended that all of you wear diapers... And, I brought Suzu-tan here to get diapered alongside you all, so she gets more comfortable with you all. I hope that's not a problem."

The three Shimushu girls looked to one another, before nodding in agreement. The idea was sound, and even if Suzutsuki looked just a little too infantile in comparison to themselves despite the height advantage... Well, she was just as badly affected as they were, so they had to help her!

One by one, the girls were laid onto their backs, and their respective dirty panties were pulled away to be thrown out another time. Then the wipes to make sure they were all spotless, and the baby powder to avoid a rash. With how volatile their bowels had become due to the drugging, they'd need the powder to stay rash-less for an extended amount of time.

One after another, the girls were each slipped into a cutesy diaper with anchors decorating both the front and the back. Not a single girl made much of a fuss, even if they didn't truly want to be treated like babies. It was just a measure to make sure they didn't make a mess... yeah...

Of course, Suzutsuki's process included one extra little step. Namely, she needed to get redressed to fit in. And wouldn't you know, Teruzuki had made sure to pack a spare copy of the outfits that the Hiburi class were known to wear.

Off went every single grey piece of clothing that Suzu-tan was going to make a mess of, and on went the cute little white cap that just barely covered up her forehead, as well as the all-too-small sailor-themed dress... so small that it didn't even cover up her adult-sized diaper, the big white padding poking out underneath her skirt. Not that the baby-girl minded it at all.

"Now, I know the outfit looks a little small, but Suzu-tan's a bit of a bigger girl than you, so this will make it much easier to see if she's made a mess. Can I trust you three to make sure an adult knows when she's made a poopy? Of course, the adults need to know when you three have as well, but Suzu-tan's a bit harder to handle given her size." Teruzuki explained, and the three Shimushu girls nodded along as they all got onto their feet, before helping Suzutsuki onto hers.

The pacified girl suckled a little longer on her paci as she slowly got dragged along by her now-fellow Kaibokans, only for her eyes to close slightly... as the front of her diaper already grew wet. Not even a few minutes after being put into a clean diaper, and that baby-minded girl had made use of it... What a silly girl.

"M-Miss Destroyer, she's made pee-pee!" The three girls said in unison, before being waved off by Teruzuki, brushing their concern aside. That single motion was enough to tell them that this one accident didn't matter, and they should just go have fun... And so, trusting the older girl to know what she was implying, they did exactly that, bringing themselves and Suzu-tan to a sprint before they disappeared down the hallway.

Once the four had disappeared, Teruzuki breathed a sigh of relief... as the soft sound of liquid tinkling into her hidden padding could just barely be heard. Now, she was free to partake in her own interests, instead of being interrupted by quite the naughty kind of girl that would forcefully regress and embarrass her sister unprompted. Of course, things were different here, since this was just an elaborate form of revenge... And in the end, Suzu-tan was happy, and she'd keep being happy once the effects of the pacifier wore off.

The brunette giggled a little to herself as she waddled down the other end of the hallway, muttering one last time under her breath.

"What goes around comes around, Suzu-tan. I can't wait to see Hatsu-tan's face when she realizes she's not the only baby amongst us."