Hyperdimension Neptunia belongs to Compile Heart, Idea Factory, Sega and whomever else worked on it.
Everyone wanted a follow-up. Here's the follow-up.
Vert giggled as she sat in the Planeptune Basilicom. "See? I told you that I've been working on my cooking."
"Mmhmm..." Neptune nodded as she ate some of Vert's home-cooked pudding. "It's good."
Vert smiled and ran a finger over Neptune's back, causing the other CPU to stiffen. "You know, darling..." She leaned in and gave Neptune's left ear a gentle blow. "Say you'll come and live with me and you'll get delicious pudding, fun games and all of the lap pillows you could ever want."
Before Neptune could answer, the door to the kitchen opened up and Nepgear stormed in. "Gosh darn it, Vert! Flirting time is over!" She glared at the short-haired CPU. "She's my sister! You can't have her!"
Vert just hugged Neptune from behind, who blinked at Nepgear stupidly, and smirked. "Awww... Is little miss perfect jealous of the love that my darling and I share with each other?" She giggled while both Neptune and Nepgear blushed and Vert ran her hands over Neptune's stomach. "Maybe she wants to have a sister sandwich? I guess she's nothing but a lewd girl."
Nepgear looked very flustered. "You can't have Neptune all to yourself! She's my sister and don't you forget it!"
Neptune had an amused look on her face. "This feels familiar for some reason." Still, with the way that Nepgear was getting super flustered and angry, she needed to put an end to this. After all, if Nepgear started a fight with Vert again, Plutia would get upset at all three of them for interrupting her nap time. "Vert, could you let go?"
"Awww..." The blonde pouted before leaning in and giving Neptune a quick kiss on the cheek.
"GAAAAH!" Both Nep sisters screamed at the same time, Neptune out of embarrassment as her face went bright red and Nepgear out of frustration and being flustered.
"Are we done with the love triangle silliness yet?" Noire asked as she looked at them from the doorway.
"I am NOT a sis-con!" Nepgear protested and stomped her foot.
"Total sis-con." Vert, Blanc and Noire said at the same time.
"I'm NOOOOOOT!" Nepgear whined and pointed at Vert. "Every day! Every day for the past eight years, you've come over and tried to steal Neptune and convince her to live with you and leave me!"
"Total sis-con." Both Noire and Blanc muttered while Neptune giggled nervously while rubbing the back of her head.
Vert had a smug look on her face. "Awww... Is little miss perfect upset that her big sister might spill some juicy secrets during pillow talk?"
"Do you even know what pillow talk is?" Noire asked, a dubious expression on her face.
Vert had a confused look on her face. "Isn't that the stuff that you say when you lay on a bed?"
"Nope, she has no clue." Blanc shook her head, kind of glad for that. For all the innuendo the girl spewed out, she really had no clue about an adult relationship, other than she seemed to really like Neptune, which was something that she couldn't wrap her mind around. 'Then again, in comparison, Neptune is more mature than she is.'
It was... A seriously depressing thought.
"Anyway, we need to get going now." Noire jerked a thumb over her shoulder. "We need to deal with those Seven Sages for good now."
"After that, you're going home, huh?" Vert asked Neptune and she pouted when Neptune nodded. "Well, if you fail this time, you can come live with me in Leanbox forever!"
Nepgear growled in anger and frustration while Neptune just scratched her cheek nervously. "Uh, Vert, we'll worry about that later, okay?"
Vert nodded. "Alright. Let's go!" She cheered and jumped in the air, incidentally causing her skirt to flutter up and flash her white, lacy panties at everyone.
(-)
A while later, in Hyper Dimension...
Green Heart panted as she and White Heart cut their way through these obviously fake clones of Black Heart and White Heart. "If Noire was here, this would be easier." She muttered while stabbing one into the street of Planeptune.
"We sent her ahead." White Heart panted, grimacing as she cut down another fake Black Heart, only to gawk as a bunch of new CPUs, these ones all wearing a skimpy dominatrix outfit and holding a wicked sword in their hands while having long, iris-colored hair flowing down their backs. "If they had a personality, this would be terrifying."
A moment later several swords cut through the mysterious CPUs and both White Heart and Green Heart sighed in relief as they recognized that attack. Turning, they saw Neptune running up to them on the street with Nepgear and others following after them...
One of which looked like Blanc and one that looked like Noire.
"I'm almost afraid to ask where I am." Green Heart muttered.
"Vert! Blanc!" Neptune smiled as she saw her friends. "Are you both okay?"
"Yeah, but there's a crazy amount of fake CPUs running around and causing problems!" White Heart growled in annoyance. "We're doing fine now, but Noire went ahead to try and deal with another wave of enemies coming after us."
A small blonde girl, whom Green Heart found absolutely adorable, was standing next to an even smaller blonde haired girl and the only reason she wasn't squealing in delight over them was because of how serious the situation was. "...Wow..." The taller blonde girl stared at Green Heart in... An almost disappointed look. "I would have grown to have boobs on the smaller side, huh?"
One could almost hear a record scratch at that.
"Uh..." Neptune looked at the girl. "Vert, what are you saying?"
"Well, mom had HUGE boobies!" She threw her arms in the air. "Like, 101 K cup boobies!" She pointed at Green Heart. "Those are, at best, G cup boobies!" She then turned to the smaller girl. "Sorry for thinking I would have had bigger boobs than you."
"It's okay, Beru Beru." The blonde child smiled at her. "Pea is surprised she got such big boobies when she gets bigger too!"
Blanc felt her eye twitching. "You mean... Your mother is even BIGGER than that monstrosity is?!" She pointed at the little girl. She then pointed at Green Heart. "And you would have gotten that big?!"
"I know!" Vert pouted adorably. "SOOOO disappointing!"
"Uh..." Neptune sweat-dropped. "Vert, Blanc, we'll see you later! Bye!"
Green Heart stared in shock as the group ran past them. "...Someone with breasts even bigger than mine?! Impossible!"
"THAT'S what you focused on?!" White Heart stared in shock at her.
"What were you focused on?" Green Heart asked.
"The fact that there's a version of you without boobs!" White Heart shot back, causing Green Heart to face-fault.
(-)
A couple of hours later...
Vert walked into Planeptune's Basilicom, sighing heavily. "I'm glad that the crisis is over, but we really need to be reassuring people that..." She trailed off as Neptune, Nepgear and that little blonde girl was there. "Nepgear!" Her voice perked up. "You came back to your big sister!"
"After dealing with a Vert trying to steal Neptune away for eight years, I suddenly understand why you hated it when she acted like this." Nepgear told Neptune, who gave her a smug look. "I'm sorry, Vert, but that's not why I'm here."
"Nope," Neptune shook her head and got behind the small blonde girl. "Vert! Meet Vert! She's the version of you from the other world."
"Goodness!" Vert perked up as she looked at her other self more closely. "You're so adorable and I..."
"BLARGH!" The mini-Vert swung her arms up and down as she found herself buried in the larger Vert's chest. "Darling! Help me! I'm getting horrible flashbacks to when mom smothered me in her boobs!"
"...Darling?" Vert asked Nepgear.
"She decided that Neptune was her perfect girlfriend." Nepgear explained and Vert looked at Neptune, who was merely grinning at her. "And for the past eight years, she kept trying to take Neptune with her to Leanbox and make her leave me and I keep having to chase her off and we always end up fighting!"
"When they destroyed five walls and woke Plutie up from her nap, they both got punished for a week over it." Neptune shuddered, as did both Nepgear and the small Vert.
An angry Iris Heart was bad enough...
An Iris Heart who was angry enough to stay awake for a week straight to administer punishment?
It took the two three months to recover from that trauma.
"I see..." Vert nodded and looked at her smaller self before her eyes watered up and she lifted her smaller self up and transformed. "I'm taking her home with me and you can't stop me!"
Before any of them could react, Green Heart had flown off and was gone.
Both Nep sister sighed in relief.
"Well, Nep Jr., did you learn anything?" Neptune asked her sister, who nodded.
"Yes! No matter her size or attitude, Vert is devious, dangerous and will stop at nothing to steal you away from me!"
Neptune sweat-dropped heavily at that. "...Well, that works, I guess." She tilted her head and suddenly blushed.
"Neptune?" Nepgear asked her.
"...Vert's mother has 101 K cup boobies. I've never seen boobies that big." Neptune giggled and grinned.
"...Should we go back to Plutia's world and see if we can find her?"
"SURE!" Neptune's eyes sparkled as both CPUs transformed and flew to the Ultra Dimension. They had a very important mission after all.
They needed to confirm if boobs that big actually existed in the world or not.
But that adventure and its outcome was a story for another time or another author, whichever happens first.
...Well, that didn't go the way I was thinking it would. Oh well, see you in the next one-shot!