[Bedwetting, Diaper Use, ABDL, Soiling, Mental Regression]

"Not again..."

A soft voice filled a small room, courtesy of a green-clad white-haired young looking girl. The girl, T-Doll G11, was sitting in a puddle of her pee, which had soaked into her bed. This wasn't the first time she woke up to the sight of her accident, but it was the last time she was going to stand for it. "Where'd I put those things... They better not have been taken or anything. Then I'd have to complain to the commander, and she'd probably tell me that I'm cute or something..."

The near-permanently sleepy young girl yawned as she nearly tipped her way out of bed as she tried to peer underneath it. "Huh. It's not there." She muttered in confusion, only for her eyes to widen until they looked like she was well and truly awake for once in her life. "Wait, they're not here!? Where are they!?" She felt the panic trembling through her body as she scrambled out of bed... only to unceremoniously trip the second she tried to walk. "Ow."

That's right. She still wasn't used to being so active. She remembered what happened the night before. Her fellow squadmates telling her that she should try and walk more. HK416 and both UMP9 and 45. What good girls... shame they were wasting their time on something futile. She liked not doing much, it's how she usually got so tired. And she needed the energy that came with it too, due to her special systems...

She shook her head. "Focus, G11. You're looking for those things, you're not thinking about your friends being better or something silly like that." The tired-sounding girl yawned as she laid down parallel to the ground before peering under her bed one more time. Sure enough, her special package had seemingly disappeared. How strange.

"Looking for these, bedhead?"

G11 immediately felt a shiver run down her spine as she turned her head towards the voice. The color then drained from her face, once she realized what she was looking at. Namely, the one that had taken away her secret, given the pack of diapers slung underneath her arm.

"H-Hey 416. What're those for?" The white-haired girl asked, only to be rather rudely grabbed by the shoulder and forced onto her bed, with the glare from her friend and squadmate's eyes peering into hers. "S-Slow down! I'm not doing anything, I'm wide awake too!"

The beret-wearing girl known as HK416 smiled from ear to ear. "Why, I'm glad. Maybe you can explain why I've not only found these things laying underneath your bed, and the extreme amount of laundry I've had to do every few days? Seriously, we're not supposed to be changing mattresses or covers that often, but you're making such a mess that it's necessary! If you bothered getting ahold of these things, maybe you should've gone ahead and put them on instead of hiding them away, you idiot!" She seemed overly upset, what with the venom that dripped from every word that left her mouth...

G11 shivered from top to bottom as the silver-haired girl started grilling her over her mistakes, tears nearly welling up in her eyes. "Y-You don't have to lay it on so thick, it's not my fault that I'm making a mess of my bed! It's just been happening, I can't stop it!" She tried to protest, only to quiet down as the glare from the taller girl continued. "...S-Sorry, 416. I didn't mean to make your job any harder."

416 sighed after hearing that honest apology, rubbing away at the back of her head as she flicked her eyes back and forth between the bag of diapers and the girl who couldn't hold her bladder. "You're excused, G11. But, I'm not about to make you live this down. You may have been forgiven, but we still need to change things around here. You understand, don't you?" She accepted the apology before tearing open the bag of diapers, grinning just a little as she imagined the power she'd have over the smaller girl...

The green-clad girl felt another shiver run down her spine as she saw the crazed expression on her squadmate's face. "H-Hey, you don't need to..." She started, only for the grinning girl to put a finger on her lips to shut her up. She felt utterly deflated after being silenced in such a simple manner, as she sunk into the mattress while her eyes fluttered in an attempt to stay awake...

"Oh, stop being so dramatic. You just need to shut up for a bit while I get you into something more appropriate." The older girl explained as she grabbed ahold of the younger girl's hat, putting it aside before she removed the rest of the clothes that were in the way. From the green unfathomably comfy jacket to her cute pants, all the way down to her soaked panties, the ones that were still seemingly fresh with pee... "Good grief, you really did make a mess of these. This can't just be because of a malfunction, this has some deeper cause..."

G11 tilted her head. "Deeper cause? Are you saying you think there's a reason beyond just... accidents? Because I don't think there's a reason beyond that." The sleepy girl yawned as she shivered a little once more, this time from the cold since she was completely butt naked. "There's nothing that could make me pee my pants intentionally..."

416 waved her finger, disagreeing as she picked a diaper from the pack. "Hardly. It's because you've been neglecting the issue that it's been getting worse. Do you know who doesn't ask for help when they need to pee, G11? Babies do. Human babies don't ask for help because they just use whatever they're wearing as a toilet." She continued explaining, even as she gently pushed the younger girl backward, letting her lay with her head facing the ceiling. Just to make it easier for the next few steps.

The white-haired girl shivered a little more as she felt the wet wipe rub up against her sensitive areas. She knew that she had to get clean down there, but that didn't mean that the sensation wasn't bothersome. It was a little icky, having something that wet and cold rub up against her to make her clean. Even as her cheeks flushed red from the dry wipes getting rid of the residue, she didn't speak up. Not a sound, not a pip from her lips. She didn't want to make her friend angrier after all. She knew that she'd just think up some sort of devious punishment or something...

"See, you're learning, G11. You're a baby, that's why you can't hold your pee. That's why you're supposed to be wearing diapers. And that." The silver-haired girl paused as she reached for a diaper, smiling a bit softly for once as she slid it underneath the cute white-haired girl's bottom. "That is why I'm going to take care of you. Okay? You can act as childishly as you like, as long as you keep up the good work and make sure you stay dry. Isn't that a good trade?" She seemed almost reasonable when she put it like that...

G11 blinked a little as she thought about it, while the diaper was being weaved through her thighs. Was it worth being ridiculed? Well, she didn't really care about what other people thought of her, so that wasn't a problem. Was it worth the childish attire? It kept her dry at night which meant that her friend wouldn't have to wash as many clothes, which was how she got into this situation in the first place. Did she care that she probably wasn't going to wear anything down below except diapers from this point on? Not really. They actually felt a little comfy around her thighs, now that she tried to squish them together and get a good feel for them...

416 meanwhile could only smile. The actual thoughtful look on the white-haired girl's face was a surprising thing to see, considering the fact she always looked either like she was about to die, or about to pass out from exertion. Both of which were utter lies, considering she never did either of those things. But it was still part of her charm, so to take away from it through her little... suggestion? It was amusing, to say the least.

"Just one more thing, to make sure you know what you're agreeing to, G11. When we do this, I want you to call me Mommy. I want you to tell me everything you'll need, and you can tell them at any point in time. But I want you to sound as childish and infantile as you possibly can. Just so everyone understands what you are. Understand?" The silver-haired girl spoke once more, laying out her plans to make everyone treat the young-looking girl like a baby, just as she was. Which wouldn't be hard considering her size and the rather large diaper between her legs...

G11 blinked a little. Calling the older girl mommy... It felt nice to think about it. But could she actually do it? She wasn't sure. Maybe she should just try it, then things would be alright. "Mom-" She started speaking, only for her body to freeze all over. She felt a pain growing in her belly she grabbed the sides of her tummy, her gasps and groans starting up...

416's eyebrow raised as she looked at the younger girl. "G11? Are you okay? Is there something you need?" She asked, only for her eyes to widen. "A-Ah, wait, you're having an accident again, aren't you? W-Well, then it's alright! You're wearing a diaper! diapers are meant to be messed, everything will be just fine!" She tried to sound reasonable and supportive, but she wasn't fully prepared for this to happen, so it came off halfhearted at best.

Still, it was enough for the white-haired girl's mind to absorb. She should just let it go and mess her diaper. That was a good thing. "Nnn..." She muttered, feeling the pressure in her bowels slowly relieve itself. She could hear a whistle-like fart squeezing out from her colon, as she tried to push a little more. She wanted to get rid of the painful feeling...

What she hadn't anticipated, was the way her mind started to slip the more she tried to push. Nobody had told her, but T-Dolls like herself were especially prone to certain... issues, should they try and actively encourage an accident like this. It had been a mechanical error with previous models, but it still wasn't fixed by the time she was made. She could feel her grasp on adult things slipping as she pushed more earnestly, a trail of drool running down the side of her chin...

"P...Poopy..." The single word left her lips as her eyes grew unfocused. The seconds ticked by and her mind gradually slipped further down, as she pushed and pushed. Finally, the brown snake that had made a home out of her colon pushed its way out, filling her diaper with ease. The serpentine mass coiled around, staining the white padding while avoiding the mattress below. A success in aspects, but considering she was pushing out her adult smarts with it, things were going to be a little more difficult from this point onward.

416 smiled as she wrapped her arms around her younger friend, rubbing her back as the stench grew just a little bit stronger from the extra mass below the girl's bottom. "There you go. That wasn' so hard, was it? Just a push and it all came flowing out with ease." The silver-haired girl was happy. By taking on a nicer approach, she managed to make G11 listen to her for once. Even better, she hadn't made a mess of the covers, so she wouldn't have to wash them before the week was over...

Only for her pleasant mood to be ruined as a bit of drool dripped onto her cheek. She gazed up to see the absent look in her friend's eyes, and she finally realized what had happened. "A-Ah. They... They did say that the diapers were sold for a good reason. I didn't think it'd be... that." Immediately, her friendly facade crumbled as she sat straight back up, pulling the white-haired girl into her arms to rock her back and forth.

"Mommy! Made Poopy!" the smaller girl cried out happily, babbling like a baby as she reached out towards her 'mommy'. To think she could fall that fast. As far as the taller girl knew, the effects of that mess wouldn't be permanent, but that still left her with quite the troublesome development on her hands. One regressed T-Doll. A mattress that was still wet. A dirty diaper, the first of many no doubt... And she also had to confront the fact that she kind of enjoyed having a baby in her arms like this. That one was perhaps the most worrying fact of all.

One thing was certain. She had a long and stinky day ahead of her, as the soft sound of pee being soaked up reached her ears...