[ABDL, Diaper Use, Futanari, Mental Regression]

Joker had been busy ever since he set up his little Nursery by manipulating the hearts of his friends. Taking them away from the public eye, to make sure that he could care lots and lots for them as they became his adorable baby girls. But he was a greedy boy at heart, which was why he kept adding more and more babies. And today would be no different, because he had managed to rope in one of the confidants that he had been able to share his secrets.

Hifumi Togo. The formerly unbeatable Shogi Player. Though he had broken her streak due to his attempts to help her out emotionally, that wasn't why she had been brought here. No, he just took a keen interest in her beauty, and thought that it'd be best to keep her as one of his many babies. Which was why he had gone into her Palace and changed the tiniest aspects about her, to make it easier for him to pull her along.

"N-Nodda baby, Joker..!" But she wasn't easy to bring into the fold. In fact, she was downright rebellious. She had understood that Joker had been behind these changes, which was why she struggled against him. Even as she was in a cute onesie themed after a shogi piece with the kanji for 'Baby' printed on her butt and 'King' on a very generous bulge in the front.

Joker just smiled as he gave that bulge a little rub, causing his latest baby to tremble and squirm as the cock that had miraculously grown from her crotch to drool out a bit bubblyprecum straight into her diaper. She didn't like it. Even though she loved it. It was wrong, and yet it felt so right.

Of course, Joker was hardly the only one that paid attention to the new baby. While most of the former Phantom Thieves were busy playing with themselves, there was one who wasn't. The former Oracle, Futaba Sakura. Instead of being busy with anybody, the little bespectacled baby was drooling and blushing as she looked at the brand new baby...

Truth be told, the little baby thought that she had been the reason why Joker had brought Hifumi here. Back when she was a shut-in, there were very few things that she engaged with. The broadcasts of Hifumi's games were one of those things, and she had fallen in love with her beauty. So when she asked for a playmate... Well, he must've figured out that she really liked her.

Joker smiled softly as Hifumi huffed and looked away from him. Because he didn't need to do a thing to break her into being a good baby. No, he had the right tool on hand already, and that tool took the form of a fellow baby. All it took was walking right over to Futaba, who was hiding behind a big teddy so Hifumi didn't notice her...

"Daddy..." Futaba muttered as she looked up at Joker as he came real nice and close. Then she looked over at Hifumi and looked at him one more time, just to make sure that he wasn't angry or anything. "C-Cwan I?" Her babyish lisp had come a long way since he started. Just listening to her now was making him all fuzzy inside...

His answer was to gently pet her on the head and nod. "She's yours, Futaba. Have fun with your playmate." That was all that he needed to say. And then he just needed to stand back and watch as his little Oracle did the rest of the work for him.

Futaba's eyes lit up as she giggled. Without a bone of fear in her body, though still with a bunch of red coating her cheeks, the baby crawled over towards the brand new baby. More than ready to give her a warm welcome. More than ready to shower her in love after having seen her on TV so many times.

Hifumi was blushing a little herself. I-It wasn't fair that Dadd- Joker had done this to her. Not just imprinted himself as her caretaker, but afflicted her with a mind that was slipping from her grasp with every passing moment as well as giving her a cock that was so dangerously sensitive that she was on the verge of cumming already. Not only that, but she was made to enjoy these foul crinkly things..! S-Sure, she had needed them to deal with the stress of perfection, b- N-No she hadn't, that was all a lie that he put in there.

As Hifumi did her very best to try and stay an adult, she was barely able to notice Futaba coming any closer. Right until it was too late, and the orange-haired girl climbed on top of her fellow baby with a giggle, their diapers already pressing against one another...

"O-Off!" Hifumi tried to cry out, but she didn't get anywhere with that. Her motor skills had massively degraded ever since Joker started to regress her, which meant that she couldn't even manage a push. And it didn't help as she heard that loud crinkling between their thighs, nor as she felt the soft fabric pressing up against her cock.

"Hifumi... Wifuwi!" While Futaba managed to say her name properly just once, the lisp took over as the orange-haired girl pressed her lips down on the other baby, kissing her cheeks, her face, anything she could plant her lips on. She loved her. She loved her lots and lots, humping away at her diapy as she grew more and more aroused. She wanted to cum. She wanted to cum with Hifumi!

The more that Futaba humped her diapy up against Hifumi's, the more Hifumi's mind was slipping out from between her fingers. She couldn't think straight. She couldn't really even think. All that she could feel was the intense pleasure of having her diapy humped. It felt good. It felt really really good!

She tried her very best to stop herself from wanting to cum. But she couldn't. There was no way that a baby like her could avoid cumming when somebody was kissing her and humping her and making her feel so good. But at the same time, it felt like she couldn't push herself over the edge. right as it felt like she was about to cum, she just couldn't. But she wanted to cum! She wanted to cum..!

"P-Pwoopy..!" Futaba cried out as she pulled up ever slightly, her own arousal pushing her over the edge. And thanks to her thorough training at Daddy's hands, of course she knew how to cum. She had to fill her diapy with lots and lots of poopies to make him nice and proud!

Hifumi had a front row seat to it. Watching and feeling the warm mess pour right out of that orange-haired girl's butt as the mess sagged its way into her diaper. Sagged its way into it and filled it to the point where it could probably burst right out at a moment's notice.

Seeing that mess was all that it took to break her. "Pwoopy!" She cried out as her eyed rolled into the back of her head ever slightly, the feeling of reaching her climax mixing together with the delight of relieving herself as she pushed a heavy load into her diaper.

Hifumi's diaper was sagging even more than Futaba's. All because it was being packed full of the last remaining adult sensibilities that were rushing around inside Hifumi's brain. Her responsibilities. Her attempts to act like she wasn't just a big futa baby. Her attempts to deny that she was Daddy's adorable and eternally beautiful baby... And her attempts to fight back against how fun it was to hump one of her baby sisters.

As a bit of drool ran down her cheek, now that the warm mess that contained her adult hood rested in her diapy... She started humping Futaba back, giggling as she returned the favor. Even one orgasm wouldn't be enough to satisfy their libidos...

And Joker just watched, happy to have another Baby to dote on…