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

So I realized that the "Heartbreak" short that came before the last part is basically a prelude to the previous part.

"Good job you two," Anonydeath said as both Yellow and Purple Heart re-entered the base, "though, neither of you made sure that they were dead?" Personally he found it amusing to see friends being forced to fight each other.

Purple Heart shrugged at him. "Regardless of whether they're dead or not, they're badly hurting." She gave him such a look that had Anonydeath shivering in fear. "If you'll excuse me, I'll be taking a shower. And Anonydeath?"

"Ah, yes?" He asked the CPU and gulped as she narrowed her eyes at him.

"If I find that you're peeping on me again, I'll do to you what I did to those CPUs." She gave him a small smirk. "Do we understand each other?"

"Ah, of course." Anonydeath nodded at her. "By the way, you'll need to the treatment room, there's some stuff I noticed that needs to be worked on."

Purple Heart scoffed and walked off, followed by Yellow Heart.

Anonydeath sighed heavily after she was gone. 'She's going to need more adjustments.' It wouldn't do for her to attack him or the others because some of her old personality came through, would it? "Then again, I don't recall her being so cold and heartless, maybe I messed up somewhere?"

(-)

Back in Planeptune...

"Oww, oww, oww!" Noire groaned in dismay as she hobbled into the Basilicom with the others. "Jeez! What was with that stupid attack?"

"Is it any different than when she turned you into a sword or me into an axe or Vert into a spear?" Blanc asked as she limped into the building. "Nepgear, are you okay?"

Limping in while having an arm over Vert's shoulder, Nepgear gave her a sad look and shook her head. "No... We finally found Neptune and now she's working for the bad guys..." She sighed heavily. "I can't..."

"YOU LIE!" A young voice yelled out that stopped the CPUs in their tracks. Turning, they all saw IF glaring at them. "Nep-ko... Nep-ko..." Tears welled up in her eyes. "Nep-ko goes missing and now you lie and say she's fighting for the bad guys?! You liars! Nep-ko wouldn't do that!"

"IF..." Nepgear whispered softly. "I'm sorry but..."

"NO!" IF spun around and ran off, tears leaking from her eyes as she ran. "YOU BIG DUMMIES DIDN'T FIND HER!"

Hearing a distant door slam shut, all of the CPUs winced.

"Children are so pure with their emotions." Blanc sighed softly.

(-)

Flopping onto her bed, IF buried her face into her pillow. "No way... Nep-ko didn't... She wouldn't!" Memories of when she had ran after a depressed Neptune and found her at the park and talked to her flooded her head. "Nep-ko..." Tears fell out of her eyes as she started to cry. "M...mommy..."

Other memories came to her and all she could do was cry.

(-)

Nine Months ago...

IF coughed as she laid in her bed. She was sweaty, trembling, cold and her throat felt like gravel. When there was a knocking at her door, she turned her head. "C...come in..." She groaned out softly. The door opened and a familiar looking mop of short purple hair stuck itself in.

"Rawr, I'm Nurse Zombie and I'm here to suck your blood!" Neptune walked in, in a white nurse's outfit, but her arms, legs and neck were all wrapped in bandages. In her hands was a tray with stuff on it.

"...that's Vampires." IF whispered out as Neptune came closer.

"What?" Neptune's eyes widened. "Aw man, then... I want your brains?"

IF nodded as Neptune put the tray down and got close to her and put her hands on IF's head. "Then... Om nom nom nom!" Neptune fake bit on IF's head, causing the sick girl to giggle, before coughing and groaning. "Oh Iffy... Here." She pulled up a small cup. "It'll help your throat feel better."

IF opened her mouth and drank the liquid, sighing as it tasted like fruit. "Wish I was a CPU, then I wouldn't get sick."

"No, no, no." Neptune shook her head and rapped her finger on IF's forehead. "If you do that, then you won't be able to have fun." She laughed at IF's flat stare. "Trust me, if you become a CPU then you'll have to do all sorts of work that's not fun." She winked at IF. "Besides, do you want to be like Blanc and be stuck as a little kid forever?"

IF shook her head as Neptune nodded and handed her a glass of water. "Thanks, Nep-ko." She whispered and drank the water, sighing at how it made her feel better. At the very least she wasn't sweating as much as before.

Neptune smiled and took the glass back. "Well, all that's left is to, WOAH!" When Neptune stood up she slipped on a toy that had been under her feet and she crashed to the floor, spilling the remainder of the water on her outfit and making it transparent.

IF giggled at Neptune's antics before yawning and closing her eyes. "Thanks... Mama..."

Neptune smiled at her and grabbed the tray before quietly slipping out. "Sleep well, Iffy."

*End Flashback*

(-)

It was an hour later when Compa came into the room and sat on the bed next to IF. "...Everyone's worried about you, Iffy."

"Go 'way."

"Ge Ge, Ploo ploo are sad and don't know what to do..." Compa trailed off as IF didn't respond and she sighed. "You know that Nep Nep wouldn't want you to..."

"WHAT WOULD YOU KNOW?!" IF yelled as she got up and glared at her five year old best friend and sister. Her eyes widened and she slumped back as she saw Compa all tense and scared. "I'm sorry."

Compa leaned forward and pulled IF into a hug. "It's okay, Iffy, Nep Nep's alive, right, she'll..." She stopped as IF trembled and hugged her back. "Iffy?"

"Nep-ko was really sad that Peashy disappeared, I talked to her at the playground, then she got better, but now she's gone too and..." IF's face was painfully scrunched up. "WHY?! NEP-KO!"

A few moments later, Plutia was in the room, hugging both girls and crying along with them. She had been close by and had listened in.

(-)

Two hours later in another section of the Basilicom...

"Are you sure?" Histoire from the Hyper Dimension stared in shock. "Neptune was brainwashed?" When Nepgear nodded morosely, Histoire bit her lower lip. "This is most certainly not good."

Noire looked at the other Histoire and bit back what she was going to say and tried using some tact for once. 'You know, it's funny, now that I think about it, doesn't Neptune usually handle these complicated things?' Sure, the other CPU did it in such a way that she wanted to bang her head on the wall, but she generally seemed to have a good idea how to handle delicate situation.

Usually by doing something silly and destroying the mood, but that was besides the point.

"How is it not good? Besides the obvious?" Noire asked the other Histoire.

The larger Histoire gave them all a serious look. "Tell me, Nepgear, what was she like when you faced off against her?"

"Um, well..." Nepgear stopped to think about it. "She had a really cold look in her eyes and beat Iris Heart with no problem."

When Histoire actually swore, everyone just stared in shock. "Listen and listen good, Nepgear. You know that your sister suffered amnesia before you came into this world, right?" Nepgear nodded, remembering that everyone would allude to Neptune being different in the past but never elaborating on it. "I want you to be very careful, if the brainwashing that she went under reverted her to her personality before her amnesia, she won't be the same person you remember."

"Huh?" Nepgear blinked in surprise. "What do you mean, Histoire?"

Before she could answer, the image got full of static and cut off.

"Amnesia?" Blanc asked in confusion.

"Hmm, I think she mentioned something about that when she fell on me ten years ago." Noire muttered softly. "Something about 'glad that I didn't get amnesia from the fall this time' or something similar."

"...Then what we fought wasn't Neptune being serious," Vert said, her face somewhat pale, "but it might be more accurate to say that we fought who Neptune was originally."

"...If that was her originally, I want the one I've known for ten years back, thanks." Noire said dismissively.

Nepgear frowned softly, remembering conversations with Vert, Blanc and Noire about how things were before she came into the world. 'They never said anything concrete, but they all seemed to hint that Onee-chan was a lot different back then. Whenever I asked them, they got really quiet. Neptune, what were you like in the past?'

(-)

Meanwhile, in Eden...

"Aww!" Yellow Heart pouted, a small towel draped over her large breasts and nothing else on her body, as she heard what Purple Heart, who was standing there naked with a towel over her shoulder, told her. "But I don't like being small! Being bouncy is so much more fun!" She jumped up and down, causing her breasts to jiggle wildly and the towel to fall to the floor, leaving her completely naked.

"I know," Purple Heart said, ignoring the naked and bouncing breasts in front of her. "However, staying in HDD is rather draining," though for some reason she didn't feel that tired, "and another thing, we both have a lot more hair to clean in our HDD forms and there's a lot more skin to wash." Seeing Yellow Heart pout, she sighed and rubbed the bridge of her nose. "Yellow Heart, if you wash yourself in HDD, you'll have lots of perverts staring at you."

Yellow Heart's eyes widened and she looked around, her legs and butt flexing in response. "Are they here now?!"

"Yes, they're looking at us right now," Purple Heart said softly, "now, how about you turn back to your human form and I will as well and we get washed up?"

"Alright." Yellow Heart said as both closed their eyes and reverted to their human forms. "Boo! Pea likes bouncy boobies more."

"So do I." Neptune said as she walked into the wash room. "But there's not much we can do about our human forms." Sitting on a small stool, she looked over her shoulder at Peashy. "Will you wash my back?"

"Sure!" Peashy ran forward and scrubbed her back. "Those other CPUs are weak, huh?"

"Yeah..." Neptune narrowed her eyes as she soaped her body up. "For some reason, those three... Black Heart, White Heart and Green Heart... They seem different than I remember them."

"Oh?" Peashy's voice was full of surprise. "You know them?"

"I don't know." Neptune frowned in confusion. "The one with pigtails, her hair should be free flowing and her outfit should be black, the tiny one should be all white with blue and the one with boobs almost as big as yours should be wearing white."

"Hmm, maybe we should have daddy look at it?" Peashy asked, getting a nod from Neptune.

"Sure, that might help." Neptune answered as she thought about those other three. "Peashy, next time we face them, I'll fight those three, for some reason..." She trailed off and balled her hands into a fist.

"What?" Peashy asked as Neptune turned to look at her, a cold grin on her face.

"I can't stand them. I'll end them myself."

"Okay!" Peashy smiled happily. "Pea will take the other two on then!"

Neptune smiled and patted her on the head. "Good girl. Just what I'd expect from my..." She blinked as Peashy was temporarily replaced with a girl with light purple eyes, long hair of the same color and a modest pair of boobs on her chest. "...What was that?"

"Huh?" Peashy blinked in confusion as Neptune shook her head and the image was gone. "What's wrong?"

"...Nothing." Neptune said and grabbed a wash bin to rinse herself off. 'What was that? Who was that? And why do I feel like I did something horrible to her?'

(-)

Hours later...

Entering Anonydeath's lab, Rei Ryghts stopped in front of two pods and looked inside one of them to see Neptune, in just her blue-striped panties, with diodes on her body and a band across her forehead while a visor over her eyes. One thing that made Rei twitch was the fact that there were diodes on places that would be considered... Lewd, such as her chest and just under the top of the front of her panties. In the next pod, Peashy was sleeping with various diodes attached to her body in a similiar manner to Neptune. "So..." Rei began and looked at Anonydeath, who was looking at readings of the two. "Wh...what... What's with the perverted set up?"

"Conditioning." Anonydeath answered in an almost bored tone. "Anyway, is there something else you wish to ask?"

"I'm curious, why did you send Neptune out so soon?"

Anonydeath paused with what he was doing and turned to look at her fully. "Because I discovered something interesting... See, that CPU is, unlike little Peashy and the other CPUs of this world, a pure CPU." Rei gave him a dumbfounded look and he sighed. "Just something I was told once, but I suppose the best way to put it is that unlike Peashy, her earliest memories were of being a CPU, not of being a human."

"Could she have forgotten?" Rei asked, getting a chuckle from Anonydeath. "What?"

"It's funny you should mention that. As I was digging around in her head, I discovered a block in her mind." He turned around and opened up a program, causing Rei's eyes to widen as she saw what was on there.

"W...What's this? Purple Heart 1.0? Neptune 2.0? Purple Heart 2.0?" Rei was confused as she looked it over.

"Apparently that's how her mind broke it down." Anonydeath said as he shrugged. "Anyway, I decided to revert her personality to what it was before." His voice was almost giddy in delight. "Turns out that she's from a world where there's a White Heart, Black Heart and Green Heart... And her original personality HATED them."

"Huh?" Rei gawked as Anonydeath played various scenes from the 1.0 memory file that showed various fights against the other CPUs, the insults, the injuries, the nights alone, the distance that Purple Heart had with everyone around her. "B...But this doesn't make sense, from what I know she... She's really well-liked by the people of Planeptune."

"Yes, now she is." Anonydeath answered her. "However, it seems like the silly little girl was serious at all times in the past and didn't have anyone she could talk to."

Anonydeath brought up a final memory that showed Purple Heart facing off against three other CPUs as they ganged up on her in a cave somewhere. The fight was rather intense and eventually the cave they were fighting in started to fall apart and Purple Heart had taken a strong blow to the back of the head and everything went black. "After that there's nothing more."

"I see..." Rei muttered and looked back at Neptune's pod and bit her lip. "Will this work for us?"

"Well, if the conditioning works out like I hope it does, then yes." Anonydeath answered.

"How does it work?" Rei asked, curious as she looked at the pink power armor.

"Simple. Situations and simulations are being forced into her head and every time she mentally does something good or agreeable to the program, she gets to feel pleasure and when she does disagreeable things, she's made to feel uncomfortable."

"Oh..." Rei muttered and looked Neptune up and down. "...Is that why..."

"Yes."

"You're a pervert." Rei muttered, her face slightly flush as she saw what Anonydeath meant by Neptune feeling pleasure.

"Guilty as charged!" The flamboyant man cheered. "Now..." His voice turned almost sinister. "Let's make sure that our brainwashing holds firm."

Anonydeath didn't tell Rei, nor did he think she needed to know, that Neptune's 2.0 mental folder had some seriously strong bonds with some people in it. 'To think that her little sister would be so important to her.' He had observed when she had let that sadistic bitch Iris Heart "play" with her sister, so he hadn't thought much about it at the time, thinking that she didn't like her sister that much. But after seeing into Neptune's mind and seeing how strong the bond was, he had to do some modifying and make Neptune think that Peashy was her little sister and not the girl that Iris Heart had played with.

'It might be interesting to make her think that her actual sister is someone who wants to kill her more than anything else.'

Anonydeath couldn't wait for the showdown to happen between the sisters in the future.

To be continued...

Part 2 of ?

I honestly have no clue how long this is going to be.