Hyperdimension Neptunia belongs to Compile Heart, Idea Factory, Sega and whomever else worked on it.

Well, after that last chapter of Ages, I felt the urge to write something more light hearted.

"You want me to do what?" Gust, the brown-haired girl with a bunny cap, asked as she stared at Rom, Ram and Uni. The three had come to her lab and were standing in front of her.

Uni flushed and fidgeted but nodded. "You know how CPUs don't age like normal humans and as CPU Candidates, well... We don't know what will happen to us if we ever become fully realized CPUs."

"Yeah!" Ram threw her arm in the air, a distressed look on her face. "So we wanna know if we're going to stay looking like kids the rest of time or if we can grow up at all."

"...So you want me to make aging up candy for all of you?" The three nodded. "...Just so you know what you'll look like as adults?" They nodded again. "Well, sure, if you have money, I could..." Gust trailed off as the three pulled out money and dropped it on the floor in front of her. "Well, this will work. But you should know, what the candy does is only shows you what you might look like and there's no guarantee that you'll have your ideal looks."

"That's fine." Uni said. "I just..." She looked at her chest and pouted. "I just get so tired of SHRINKING when I go HDD! Not just my boobs either! I get shorter, my hips shrink and everything else gets smaller too!"

"Well, okay..." Gust nodded and took their money. "Come back in a couple of days, I need to make it right."

"Sure." Uni said as the three left Gust alone.

"...This might be interesting." Gust smiled as her eyes gleamed. "Been meaning to make a new experiment. Looks like I have test subjects now."

(-)

Three days later...

"Gust!" Uni called out as she, Rom and Ram all entered Gust's lab. "We're here!"

"Ah!" Gust smiled as she saw them. "Good, good!" She pulled out some clothes. "Get changed into these and then eat the candies that are on them." She motioned to the balls on the clothes.

"Huh?" Uni blinked as she looked at the clothes. "Why?"

"Well, there's no telling what will happen when you eat the candy, right?" Gust told her. "Maybe you'll end up as big as Lady Green Heart and if that happens you want a shirt that can be loose enough in case your boobs get that big and you'll want pants that can stretch, because if you get that tall, well..." She motioned towards Uni's skirt. "We'll all be able to see your underwear." Uni blushed and Gust suddenly slapped a fist into her open hand. "Oh, and you'll want to go without panties on."

"WHAT?!" All three yelled at the same time.

"Well, you don't want your panties to not fit after changing and hurting you, do you?" The small girl smiled at them nervously. "Don't worry, I have changing rooms for all three of you."

Rom, Ram and Uni all looked at each other nervously, but nodded and went into the changing rooms, closing the curtains, which went down to their ankles, behind them.

Gust smiled and waited for them as she listened to the sounds of rustling cloth. "Just tell me if you need anything."

"This feels weird." Rom's voice was heard. "I'm not used to not having panties on."

"You're telling me." Uni answered and Gust could hear the embarrassment in her voice. "Still, I just want to know what I'll look like as an adult."

"I think it's kind of neat." Ram answered back. "Feels kind of funny but good."

Gust nodded and wrote down some stuff on a paper notebook. "CPU Candidate Ram has awakened a previously hidden desire." That was good to know, she just hoped that this knowledge wouldn't come back to haunt her somehow in the future.

"Okay, so... Gust, these are biker shorts!" Uni yelled.

"They'll stretch and won't feel uncomfortable if something weird happens like your butt becomes five sizes larger than it should." Gust told her.

"Fine." Uni sighed as there was rustling of clothes heard. "Okay, so then just... Eat this?"

"Yep." Gust nodded, though none of the candidates could see it.

"Well, here goes then." Uni said.

"Mmmm!" Rom's voice was heard. "Chocolate."

"So how long will, ooooh!" Ram's voice was heard. "I feel funny."

"Give it a minute and sit down, you'll hurt yourself if you don't." Gust told them. She hummed and sang to herself before one of the curtains moved. "If you're ready, why don't you come on out?"

The three curtains opened up and Gust raised an eyebrow as she saw all three.

They were all wearing biker shorts that clung to their hips and butts and somewhat loose tank tops that Gust was rather glad she had gotten as large as possible.

Uni had grown more than a dozen centimeters in height, her legs becoming thicker and wider, as were her hips and her bust had increased from a small B cup to at least a moderate D cup. Which was bigger than Noire's chest at least. "Wow!" Uni gasped as she saw herself in a full-length mirror. "This is me?!" Her hair was the same length as before. Her eyes sparkled. "I could be Noire's twin now!"

"Aww!" Ram pouted as she saw herself. "I didn't change much." She poked her chest and sighed. "At least I have some boobage."

"You're as tall as Lady White Heart is." Gust countered. "Plus Gust thinks you're looking in the wrong place." Ram looked confused. "Turn around and bend over."

"Huh?" Ram blinked but did so and looked over her shoulder, gasping in surprise. "Wow! My butt got huge! Glad I'm not wearing any panties, I'd probably have a bad wedgie right now!" She put her hand on her butt and found to her shock and surprise that her fingers not only couldn't go from the side of her butt to the center, but her fingers also sank into the soft, supple, yet somehow firm, flesh of her posterior.

"That's bigger than my butt right now." Uni muttered in shock. "I think that's bigger than Neptune's butt when she's in HDD." Both Ram and Gust stared at her and she blushed hard. "...She has a nice butt, okay? I can look and admire someone else's body! I like how nice Vert's boobs are, okay?"

"...You wanted boobs the size of Lady Vert's and a butt like Lady Neptune, huh?" Gust asked and smirked as Uni blushed and nodded.

"FEH?!" A voice that sounded like Rom's, but was slightly deeper, suddenly cried out and everyone looked at the last changing room as Rom came out. "I got big!"

Uni, Gust and Ram all gawked in shock. Rom was not only taller than all of them, but her chest had grown in size.

"I have Blanc's dream boobies!" Rom complained as she waved her arms up and down, causing her boobs to jiggle wildly. "HELP! I don't wanna become conceited like Blanc was!"

"I don't think that would be a problem." Gust said, gawking in surprise while taking notes. "Hmm, maybe it makes you look like what you think an ideal adult should look like."

"...So my idea of an ideal adult body is Noire?" Uni muttered and sweat-dropped as both Rom and Ram gave her flat stares. "...What?"

"You're almost as much of a sis-con as Nepgear is." Ram said, causing Uni to blush. "Of course you'd look like Noire. But why do I have a big butt then?"

Gust shrugged and looked at Rom, who was fidgeting and blushing. "And what about you? Did you want to look like Lady Vert?"

"Um... I thought Peashy's HDD was better." Rom said, blushing. "But I didn't want to be this big!"

"Hmm, maybe a bad batch?" Gust mused as she took notes. "This is experimental, must get more data and..."

There was a knock on the door, which opened up. "Is anyone here?" Nepgear's voice was heard. "Excuse me, but we're looking for Rom, Ram and Uni and..." Nepgear trailed off, her eyes staring in shock as she saw what could be Noire's twin, someone who looked like Rom, but was as tall as Vert and even bustier than the blonde and someone who looked like Ram but was bent over and wiggling and fondling her own butt. "What the goodness?!" She yelled in shock and surprise.

"Did you find them?" Blanc asked as she and Noire both walked into the room. "...B...BOOBS?!" She sputtered and pointed a shaky finger at Rom. "BOOBS! BOOBY BOOBS! BOUNCY BOOBY BOOBS! BOOBIES!"

Uni sweat-dropped as Noire gave her a look of appraisal. "Um, hi, sis..."

"...Uni, what's going on?" Noire asked, unable to hold her curiosity back.

"Well..." Uni poked her fingers together, which, considering she looked exactly like Noire, just a little taller, was kind of weird. "I was tired of being the only one who shrinks in HDD and I got curious, what if I got bigger or at least, a little older..."

"And you came here and took something experimental that made you look like me?" Noire asked and Uni nodded. "I guess it can't be helped." She looked at Gust. "...How long will this last?"

Gust shrugged. "Don't know. Could be a few hours, few days, a couple of weeks, months or even longer."

"Hey, Blanc!" Ram smiled as she ran over to Blanc. "I'm taller now and I got a HUGE butt!"

"BOOBS!" Blanc sputtered and Ram pouted as Blanc wouldn't react to anything but Rom, who was jiggling even when she breathed.

"Um..." Rom scratched the back of her head. "I'm sorry." Sadly, the actions only caused her breasts to jiggle and Blanc's mind decided that was enough as she suddenly fell backwards, out cold.

"...Lady White Heart's OS has crashed and needs to be rebooted." Gust said as she saw what happened.

While Uni and Ram would return to normal before the day was over, Rom was stuck with her new form for half of a year.

Which would result in Vert kidnapping Rom and trying to have her made into Leanbox's CPU Candidate, much to Neptune's amusement when she heard about it.

I still like making people suffer! Mwhaahahahahaha!

So, this is actually a reference to the manga chapter where the CPU Candidates ate some of Gust's candy and were turned into babies and Neptune had to take care of them until they got to Gust's place and fixed the issue. It's also a reference to an anime audio drama where Rom and Ram ate some candy and their boobs grew until they were just about as big as Vert's boobs. They got back to normal when they realized that having boobs that big would make Blanc sad. ...But then Blanc revealed she had candies meant for adults (they had alcohol in them) and the twins wanted them, so they grew super boobs again and Blanc went BSoD.