[Feminization, ABDL, Diaper Use, Wetting, Mental Regression]

Blades clashed as two allies faced each other on the battlefield. And despite being dedicated to the same cause, the slaying of Demons, one of them was currently straying from his path...

"Ara, Tomioka..." The girl currently on the offensive, The Insect Hashira Kocho Shinobu, slowly ran a finger along her blade as she backed away. "You really would stand and protect a Demon? Did you finally realize nobody liked you, and you decided to defect from our side?" Shinobu mused, giggling ever softly as she remained on guard despite her taunts...

The Water Hashira, Tomioka Giyu, remained steadfast in response to his ally's taunts. All he needed to do was put an end to her assault. He did not plan to fight her for long, just long enough to keep her from pursuing his companions. And beyond that...

"People like me." He muttered in an uncaring tone. All while trying to mask the sound of something beneath him. She just had to catch him at an inopportune moment like this. The first thing he was going to do when he got the chance was definitely deal with his own predicament, and then regroup with his allies...

Shinobu raised an eyebrow ever slightly before chuckling. Tomioka was as witless as ever. He didn't understand what was meant to be serious, and what was meant to be mere teasing. Not that it mattered that much, because he would fall to her blade. And then so would the Demon he was trying to shelter...

As she dashed forward and clashed blades with him again, her eyebrow raised ever higher. His stance was wider than usual. Not wide enough to throw his guard off, but wide enough that it was noticeable. What exactly was he hiding..?

Tomioka broke their clash and nearly drew blood from his would-be-ally in the process, his gaze sharp. All while he adjusted his stance slightly, keeping his legs wide so as to not draw attention towards his secret.

Unfortunately, now that she had started to notice... It was impossible for Shinobu to not pick up on the subtle differences between his usual self and this current state he found himself in. Especially as her ears caught the sound of something...

Infantile. My my, was that a crinkle she heard? Tomioka thought that he could possibly fight against her while wearing something meant for young babies? ...No, she had to be imagining it. There was no way that he was fighting while over encumbered by something so silly.

And yet as she clashed blades with him once again, not only did she hear the significant crinkle that echoed out from his thighs. And beyond that she picked up on a smell that permeated around him right before he knocked her back once again...

It was a powdery scent. Not just any powder either. Baby Powder. Despite the sheer impossibility of what she was hearing, it had to be a diaper. The Water Hashira was fighting her while padded, and he was putting up quite the fight despite his handicap. Something that should've infuriated her, and yet...

A soft smile snuck its way onto Shinobu's face. The fact he was padded meant that she could use one of her latest poisons. She had intended to use it exclusively on Demons, to make shame and humiliation settle into their bodies before she finished them off... But where was the harm in using it on somebody that clearly deserved to be her guinea pig..?

"Ara, Tomioka... You're doing quite well." Shinobu said as she lowered her guard for a moment. All while keeping a pleasant tone and expression. As if she was planning on putting an end to their fight. "And yet you seem to be off-center. Might there be something ailing you? Perhaps that Demon you're sheltering might have caused you harm?"

Tomioka twitched for barely a second. And that moment of weakness was all that Shinobu needed, breaking into a sudden sprint as she zipped past him, all while carefully sheathing her blade once she came to a stop.

"Ahhh... Let's see what you've been hiding from me, Tomioka..."

Before he had the chance to react to her slash, the fight had come to an end. The moment she managed to zip past him, she had already cut his clothes to threads. Leaving every single little thread drifting to the ground below, while revealing the pristine padding underneath. The big, cushy, obnoxiously thick diaper that was forcing him to stand with his legs spread...

"Y-You..." Tomioka muttered as his face grew bright red in response to his secret being unveiled. He thought that he had done everything he could to make his diaper as silent as it could be. And yet she had managed to suss it out. She had managed to figure out his secret... But how much of it was she aware of..? He had to keep his guard up, so she didn't find out about why he had to wear them.

Shinobu giggled as she eyed Tomioka's cheek while he remained almost paralyzed at the prospect of being stripped in such a brazen manner. There was a tiny scratch from her blade making contact, and her poison had no doubt already managed to slip inside. She just had to wait, and he would be rendered completely and utterly unable to fight back against her... And then she would make sure that he would end up as nothing more than her toy.

"Ara... I thought you were a Hashira, Tomioka. Though, I suppose there is room for a Baby Hashira among our ranks, especially after you've tried to defend a Demon." Shinobu giggled, keeping her blade completely sheathed. She didn't need it any longer. Not now that he had been infected with her poison. "Would you like to explain why you're wearing that? Or do you want me to force you to tell me?"

As Tomioka heard the subtle threat leaving his would-be-ally's lips, it was like his heart suddenly seized in pure fear. W-Why did he... Why did he feel this way..? Why couldn't he just reject her? It was to the point where he wanted something to comfort him, a feeling he desperately tried to shake off to try and gather his composure...

Shinobu stepped closer. "Well, Tomioka? Would you like to tell Mommy why you're wearing these big bulky diapers?" She didn't even think of him as an enemy at this point. The sheer look of worry on his face made it difficult for him to appear as anything but a poor defenseless infant. And she was going to take advantage of that...

Tomioka let out a sharp cry as he suddenly felt her hands digging into the soft padding. It was humiliating enough to be unable to truly fight back against her... It was worse when she started to tease him more directly. Especially as those fingers sank deep into the padding, reaching dangerously close to his more delicate areas. And despite the blade in his hand, he couldn't bring himself to swing it. He'd harm Mo- S-Shinobu...

"Looks like the little Baby Hashira can't get a word out." Shinobu teased, all while keeping one hand firmly on that thick and bulky diaper, squeezing it and rubbing it over and over while switching between the two motions every few seconds. "So Mommy'll tell you why you're wearing these. You've got a problem that you can't fix. And the only solution to the problem was to ignore it and try to work around it. That's why you're wearing these big diapers. That's why you're facing Mommy like you think you can beat her. And that's why you're going to use them right now, isn't that right?"

"I-I'm not going to use them!" Tomioka said, crying out as he tried to fight back against her influence. Fight back against whatever she had done to him. Even though it felt good to have his butt squeezed like this, the humiliation was too much. He had to stand his ground. He had to make sure that he could still appear as an adult, even though he was so thickly padded...

And in his haste to try and protest, he didn't even notice that a *hiss* had poured out from his crotch. A rather generous one at that, as the front of his diaper quickly grew nice and yellow and soggy as it absorbed as much of his pee as it possibly could. All while Shinobu had to let out a soft giggle...

"My my. You said you're not going to use them, and yet here you are. Wetting yourself like an overgrown child. I was right to call you Baby Hashira, if you're this eager to use them..." Shinobu giggled, pulling her hand off Tomioka's butt as she stepped back a bit. Just so he could properly understand exactly what had happened.

Tomioka didn't want to believe her. But as he finally noticed the warm sensation between his thighs, and how nice it felt and how much he just kinda wanted to squat down and get it all out... Only to shake his head as he trembled and tried to fight back against its influence. "I-I don't want to use them. They're there to... t-to..:"

"To protect your little Baby butt from getting dirty because you can't keep it in." Shinobu giggled. "You really can't hold it, can you? You're an overgrown infant with no continence. I'm surprised you're even able to hold your sword. Why don't you try and swing at me, Baby?" Just like before, she'd tease him. But she would threaten him yet again to instill fear in him. "But if you miss... You won't like what Mommy'll do to you."

The regressing Hashira let out a fearful cry as he suddenly dropped his blade. He didn't intend to. He definitely didn't intend to. But his muscles were failing him. It was like that sense of dread sinking through him was making his body unable to obey his mind. It was a wonder that he was even able to still stand, especially as she kept looking at him like that. Looking at him like she was disappointed in him... W-Why was it making him feel so bad?

Shinobu was enjoying this far too much. At this point the Demon that he had been protecting didn't even cross her mind. The sheer delight that she felt from humiliating Tomioka was far beyond what she had expected, and she loved every moment of it. And to think that his humiliation wasn't even close to its peak, as the full effects of the poison were only just about to kick in.

"N-Nodda Baby!" Tomioka tried to cry out in defiance as he reached down to grab his blade once again, but in the process he quickly lost his balance and ended up landing right on that big padded butt. It was so strange, he was sure that he could easily stand. And yet here he was, currently stuck on the ground. And not only that, but his speech had definitely degraded.

Of course he didn't even notice why he had lost his balance. His body had rapidly lost a lot of its muscle definition. His shoulders had grown nice and slim, while his hips were forced outward and his chest started growing ever slightly puffy. All of his masculine traits, even the stuff that was hidden by the diaper, was quickly being exchanged for feminine aspects. Especially as his hair started to grow nice and smooth and silky, more befitting of a girl...

Shinobu giggled as she stepped forward ever slightly. "My my. It looks like you're not much of a boy any longer, Baby Hashira. Perhaps you'd like a dress, when I've brought you back home?" She didn't pass up the chance to tease him. Especially not when his manhood was rapidly shrinking and disappearing. By the time the poison finished, there was no way that he'd be able to call himself a man... Much less an adult.

"N-Nodda... Nodda baby... N-Nodda girl!" Tomioka's ability to speak was rapidly decreasing at the same rate as his voice was growing higher pitched and his feminine aspects were growing more apparent. He didn't want this to continue. He wanted to put a stop to it. But how? His body was not doing what he wanted. It was making him sound so infantile. He was an adult, not a baby. No matter what Shinobu said...

"The only ones that start drooling and begging to be treated as something they're not are babies. And that's what you are, Baby Hashira." Shinobu said, before she carefully pulled out a tiny little vial from her sleeve. "But if you want to prove me wrong... Then you'll have to get this from my hands. You can do that if you're an adult. But if you're a Baby who can't do anything, then Mommy'll have to punish you."

Just like that, Shinobu set another wave of fear through Tomioka. A wave of fear so strong that he definitely couldn't stop himself from wetting his diaper a little more. That diaper had grown to twice its size thanks to how much it had soaked up, making it even more difficult for him to properly walk. But he... D-Despite the fear that was flowing through him, he was going to get up and get that vial from her!

"G-Gimme..!" Tomioka cried out as he barely managed to get right back up onto his feet, struggling to stay standing thanks to how wide his stance was. And then he started waddling towards his goal. Slowly but surely, hoping that he could keep it up...

And yet his goal was getting further and further away. Because Shinobu said nothing about staying in the same spot. As he waddled closer, she took another big step backward. All while keeping the vial held out. Keeping it juuust out of his range so he couldn't possibly just reach for it. Taunting him more and more with every passing moment.

Tomioka struggled. His waddle had gotten even more exaggerated. It was only barely able to be called a walk a few seconds ago, but now he really had to put a lot of effort into taking a step. It was all because of his diaper. Why did he have to wet it so badly? Why couldn't he just-

He let out a gasp as he suddenly couldn't keep his footing, landing right down on his crotch as all that sogging mass spread around. It was difficult to move after falling down on his diaper, but he was determined to make it to his goal. He wanted to prove his adulthood.

Even if he had to crawl. Even if he had to put his hands down against the ground. Even as he had to drag his knees along to try and get close to the vial... Even as he had to notice just how feminine his body had gotten...

His fingers. His arms. His body. He nearly looked like a girl in every aspect. Even his breasts had started to grow. It was making his heart beat faster... Because it felt... right... B-But it was wrong. It was definitely wrong. There was no way that it was right. He had to get that vial. He had to. He had to...

And in that moment, as he focused so hard on trying to crawl towards the vial... He didn't focus at all on trying to keep his bladder in check. Resulting in his expression growing nice and calm and relieved as another loud *hiss* echoed out between his thighs. Leaving his diaper growing even larger as it soaked more and more... And at this point, it became too difficult for him to properly drag along the ground. Which left him stuck where he was currently kneeling... And it meant that Mommy had won...

Shinobu giggled as she pocketed the vial and stepped closer. "Well well. It looks like the Baby Hashira failed to prove that he's an adult. And you know what that means, don't you?" Her giggle sounded all the more menacing as she kneeled down to look the Baby in the eye. All so he could realize just what she had planned on doing to him...

Tomioka wanted to try and struggle. But there was no way that he could. He was forcibly stripped of his diaper, which served to give him a moment of relief... But it didn't last for long before he felt the sting of her hand slamming down on his cheeks, sending pure pain through him in the process.

It was too much. He was forced to let out a scream as tears started to pour down his cheeks. And then another scream, and several more overly exaggerated feminine cries. There was little that he could do as his butt turned redder and redder...

Shinobu smiled and sighed with satisfaction as she delivered spank after spank. Delivering this punishment felt so right. Forcing the feminized Baby to endure it all... Because it's what he deserved. He deserved this after having tried to look like an adult. He deserved it after everything he had done...

Eventually all those spanks came to an end, and Tomioka was reduced to sobbing in shame as he was finally let off Mommy's lap. His cheeks were throbbing. His body was aching. But most importantly, he had managed to wet himself while being spanked. Not that Mommy punished him for it. She knew it would happen.

Just like she knew she'd get to use this poison, as she pulled a fresh diaper out. A single foreboding glare was all that it took to make Tomioka tremble and lift up his legs, exposing how absolutely tiny his manhood had gotten, while that diaper went right underneath his butt. It then weaved through his thighs and snapped shut around his waist, leaving him nice and clean... Mostly. But it was utterly impossible for him to recover any sort of dignity. Especially after that punishment.

"Now, let's get you home, my little Baby Girl. You'll be a good Baby from now on, won't you? Or do you want Mommy to punish you again?" Shinobu giggled, as she scooped the feminized Baby up into her arms once more. Carrying him with such ease as she downplayed the few bits of his masculinity that still remained.

He just shook his head. "N-No, Mama..." Even though his spirit hadn't yet been broken... His body couldn't properly portray it. So he was forced to go along with it. Forced to accept this infantile state...

With no real end in sight, besides spending the rest of his life as Shinobu's adorable Baby Girl...