One wouldn't think much of the relationship between the Goddesses so much as long as they get along
Which is how it's supposed to be. At least until Nepgear ended up messing up with a lab experiment which caused both her and Neptune to grow dicks. Why dicks? For plot convenience of course this is a hentai of my own fantasies.
Both Neptune and Nepgear started to slowly be overtaken by lust but they couldn't just satisfy themselves with each other because they're siblings you dumb eggy!
Neptune did have some dependable friends however among them being Noire the sexiest CPU of them all at least according to Nep's personal preference. They're just friends.
"GLCK GLCK GLCK~!" And Noire was already choking on Neptune's cock as she was aggressively sucking her dick due to Nep's rough facefucking in her underwear. Yeah.. they're just friends
[10:37 AM]
"Ahhn Noire~" she moans as she sped up thrusting her dick further into the Raven Haired girl's mouth. Noire just had to stand there and take it as drool slips out of the sides of her mouth, Nep's cock throbbed leaking out precum which eventually shot out into one big load into Noire's mouth. Noire closed one of her eyes as she was forced to swallow every drop of Nep's semen
She then backed away and began to cough heavily "Are you trying to suffocate me!" She said heavily flustered, she did enjoy the extra roughness however Nep knew that- "Sorry Hehe~" she teased back as she rubbed the back of her head. Cock still fully hard Noire blushed as she looked at it and pulled off her bra letting her slightly bigger than average bust to spill out. "This is what you want..?" She said shyly as she lifted up her breasts and began to wrap those fleshbags of hers around Neptune's length
Neptune drools at the sight of this and without any hesitation began to thrust into other CPUs cleavage as Noire held onto her breasts, she began to move her breasts in sync with Nep's thrusting causing those jiggly breasts to smack and clap against Neptune's waist as her wet slimey cock slips on between Noire's cleavage, Noire's titfuck was probably one of Nep's favorite things to do, not a day goes by where she's not asking to fuck those tits of Noire or Black Heart's.
[10:39 AM]
Noire did get used to this eventually rather she wants to admit it or not and became more skillful In return. She stuck her tongue out and licked the tip of Nep's dick while having her tits fucked like this. "Noire I'm cumming~!" Nep moaned causing a load of semen to spray off from between Noire's cleavage onto her face and breasts. As usual Noire was given her daily bukkake causing her to sigh as she reluctantly turned around to lower her panties and show off her obviously soaked panties to Neptune
"I'll never get tired of this view~!" Nep said putting one of her hands on Noire's perky ass cheek while she aligned her cock against the other CPUs pussy before sliding into Noire. "...Nnngh..~!" It was always a pleasurable experience to get dicked down like this but she's not going to admit it. Nep began to fuck Noire I'm Doggystyle position as her balls hit against her thighs, Noire could feel Nep's clock stretch open her already used pussy causing her to moan. Noire's pussy began to coil and wrap around Neptune's dick not wanting to let go in the slightest.
"Oooh Noire~!" Nep moans as she sped up pushing her dick past Into Noire's womb. Nep leans onto Noire and began to grope those supple cum covered tits of hers causing the other CPU to squeal out more from the added pleasure as she got dicked down by the smaller Goddess. Noire's ass ripples like waves as Nep kept going relentlessly until she finally unleashed a fierce load of Semen into Noire's womb "N-Neptuuune~!" "Neppuuuu~!" They both moaned out loudly, Noire sticking her tongue out as her pussy became even wetter on the verge of climaxing herself. Noire's body twitched lightly as she catches her breath and after a few minutes she got flipped over to her back by Nep "Huh!?" She said in a shocked tone
[10:39 AM]
"You thought I was finished? Silly Nowa I'm not a kid you know." Nep said with a shy but cute smile on her face as she grabbed Noire by her legs and tossed them over her shoulder. And then she pulled out her length and almost immediately SLAMMED into her causing Noire to moan even louder than before. "AAAAGH!" Nep then proceeded to put Noire in a mating press while plunging her cock in as deep as she could with her intentions of impregnating Noire. But Goddesses can't get pregnant so it's chill.
"Y-You're being too rough!" Noire yells as tears form around her eyes from the overbearing pleasure she was feeling at that moment. She was getting railed HARD by a Goddess smaller than she was, how is this possible? The bed began to creak the bedframe was knocking up against the wall. Nep didn't care about the situation she just proceeded to dick down the Raven Haired Tsun like if her life depended on it
Noire's body twitched violently, her twintails moving up with her and so did those cum slathered breasts in such a hypnotizing motion like gelatin. Her pussy pulsating even more than before as her fluids seep down her rear while Nep had her way with her. And then she had enough. Noire finally climaxed heavily as heart pupils formed in her eyes while her pussy tightened up it's grip around Nep's cock.
[10:39 AM]
"N-Not like thiiiis~!" Nep wasn't gonna give in despite being so close to her own climax, she pulled out of Noire's pussy and then proceededly spears into Noire's pussy repeatedly plapping against her hips for about a minute before unleashing one more hefty load of white pudding into Noire's baby making room. The black haired goddess screams Neptune's name so loud it could be heard outside the room.
Kei walked past the room carrying some paperwork but stopped in place when she heard Noire screaming and sighed "Ah shit, here we go again.." she said in a slight annoyed tone with her cheeks fairly flushed, she walked away to Noire's office with the stack of Papers. Meanwhile Noire lays onto her bed breathing heavily catching up on her breath as Nep's semen pours out of her pussy and onto the bedsheets. "This is the twelfth time in two weeks I have to change the bedsheets.." she said with her arm over her eyes. Neptune felt a little guilty and laughed it off "Sorry~ once I get started I don't know when to stop. Don't worry about the bedsheets, I'll Nep up some new ones for you!" The purple haired goddess said confidently and Noire's lips curl up in a smile causing her to chuckle a bit. "Alright.. I'll pick them up in a bit." She said softly. Yeah.. they're just friends.