Alright, let me reiterate what I said last time: Peashy is aged up in this chapter as to not make this chapter creepy. If you don't know what she looks like, link, but just remove the spaces: danbooru. donmai. us/ posts/ 2037853

Disclaimer: I do not own Hyperdimension Neptunia. It belongs to Idea Factory and Compile Heart. OCs and any game references belong to their respective owners.

Boys Like Boobs, Don't They? (Kuro x Peashy/Yellow Heart)

"…They… grew again…"

This was the sullen thought of Peashy as she checked herself out in the mirror. She had stripped out of her hoodie and other garments, leaving her in her bra and panties.

'What makes me mad, though, is the fact that they get WAY bigger when I transform… Even bigger than Bert's… Wasn't she mad at me for that?'

Despite all of her moping, she did smile at one particular thing regarding her breasts. She loves using them to tease her "big brother," Kuro 'Icarus' Seishin.

Kuro was originally from another dimension, but wound up here along with Neptuna. The group came across her, IF, and Compa and has taken them in while they were still toddlers. Afterwards, Kuro began to visit them everyday and, over time, he became her favorite person in the world besides Neptuna. She loved him ever since he babysat her when she was younger.

Years later, once Peashy began going through puberty, he once brotherly love began to bloom into a deeper sort of love. She became infatuated with him, yet she knew that he didn't necessarily feel the same. To him, Peashy was like a little sister.

She didn't want that…

'I want Onii-chan to notice me. But he only sees me as a little sister…'

Right as she did that, she looked into the mirror and one thing caught her eye. Or should I say, two things

Her breasts.

She unclipped her bra, setting her mounds free, and cradled them in her arms.

She had boobs, now. She had evolved from a little girl to a young woman, and a CPU. A young woman with an ample bosom. Last time she went bra shopping, she had bought bras in the C-cup size. Now, it looked like she'd grown into a D as her current bra was getting tight.

'Maybe…' in her head, multiple scenarios played in her head. One in particular making her turn red like an apple. One involving a lot of touching… and a certain part of his anatomy… going in and out of… a certain part of her anatomy.

She shook her head, trying to clear her mind of those dirty thoughts. A certain part of her brain gripped onto them, though, and she wondered…

Would that ever even happen? Did she actually WANT it to happen? At the end of the day, Peashy was still a young woman in love with a young man. The types of feelings he gave her with just his mere presence were just… she couldn't even describe them.

Peashy's whole body felt like it was on fire, and there was a very distracting ache slowly building between her thighs as she stood. Her head just became filled with questions whenever she tried to think of ways to improve hers and Kuro's relationship.

What does Kuro like? What types of girl does he favor? Was she even one of them? Had some other girl taken him away from her under her nose? If so, why wasn't it her?

Does he like big breasts or smaller ones?

She took one more look into the mirror, directing her gaze right at her breasts. They were big and soft. Boys liked boobs, though she never understood why. They were just lumps of fat on a girl's chest, but that was a fact. Kuro was a boy, so he liked boobs too, right?

He didn't particularly show such an interest. Which is especially surprising when he was surrounded by a number friends with big boobs, Bert being the first one to come to mind.

Despite everything, she began formulating a plan in order to capture her crush's heart…

Peashy's opportunity to strike came on Friday Game Night, the bi-weekly together-time where all four CPUs gathered in front of the TV in Planeptune's Bascilicom's living area and spent half an hour or so "debating" with each other about what game to play.

This time, Kuro and Plutia were united in wanting to play a fighting game starring a bunch of ninjas with superhuman powers, something which Peashy noted with mild jealousy, but they were outvoted in favor of a multiplayer hack-n'-slash she hadn't heard of until now called Destiny Fighters.

Kuro obviously had no desire to play the game, not being a fan of the genre, something Peashy quickly noticed, so it was pretty easy to call him away to help her do something in her room. That was a complete lie.

As soon as Kuro entered the room, Peashy enacted her plan. He shut the door behind him and she was thankful that everyone was currently distracted by the game. The boy opened his mouth to ask her what she needed help with, but before he could say anything he was pushed against the wall by a yellow blur.

"P-ko?"

"…Onii-chan~"

She instantly closed in and her warm, soft lips found his. Peashy felt her heart fall to her feet and all self doubt left her. She wrapped her arms around Kuro's neck pulling him closer, kissing him deeper. She felt his tongue slide through her lips and into her mouth. The blonde's whole body woke from what felt like a deep sleep. Her desire for him to touch her turned into a need. She felt the need for his touch more than she felt the need for oxygen.

Peashy called off the lip lock, both of them breathing heavily. A thin strand of saliva connected their mouth as they started at each other. She quickly discarded her hoodie and guided one of Kuro's hands into her left breast, letting him in on the fact that she was not wearing a bra.

The boy's breath hitched at the soft feeling of Peashy's boob. However, he felt there were more pressing matters to attend to. Such as, her telling him just what the hell this was about!

"P-ko, seriously, what's going on? If you're seriously following Vert's example, I'm going to have a talk with her," he asked.

"Onii-chan, I… I-I…" poor Peashy struggled to let him know what is was she wanted from him.

"You…?" he asked her, his voice still gentle, his hands moving towards her arms to give it what he hoped was a comforting squeeze. He couldn't help much with girl problems, but he still wanted to do something if P-ko was upset.

Peashy took refuge in his strong, calloused hands gripping her bare arms. But as soon as thoughts of what those hands could do with her body came to the foreground, she instantly averted her eyes from any part of Kuro whatsoever and whimpered.

"Do… D-Do you…?"

Lifting her chin so that their eyes met, completely unaware of Peashy's minimal squirming and the moisture in her panties, Kuro says evenly in the hopes to calm her; "Do I what? Go ahead, P-ko, I'm listening."

"D-Do you… l-l-like b-b-boo…?"

"Do I like Boos? Only when I'm able to kill them."

Taking a deep breath, the blonde's nerves sure sudden marginally and she backed away from his grasp. Kuro was about to ask what the problem was when—

Zzzzzzzip!

—he bore witness to Peashy unzipping her top and shedding it instantly, her magnificent, naked tits out on display as well as her yellow-white striped undergarments.

"Peashy?! P-ko?!" Kuro asked, the blood rushing to his face and nose as he tried to look away.

"Does Onii-chan like boobs…?" the blonde asked, blushing up a storm.

"WHY ARE YOU ASKING ME THAT?!"

"Ssshhh! Don't let the others hear you…!" she shushed him before taking his hand in hers and letting it rest on her left boob again.

"Peashy, stop! Think about what you're doing!"

"I am. I want you, Onii-chan. I love you," she admitted, no longer hesitant. Despite that, her heart was beating a mile, a minute.

"I love you, too, P-ko," Kuro responded in turn, but not in the way Peashy wanted.

"No, you don't. Not in the way I want you to…"

"What do you mean?"

"I'll… show you~" Peashy's voice was barely above a whisper as she closed in on him. Their tongues met and Kuro put his hands on Peashy's hips. Peashy happily pulled him onto the bed with her. Kuro wanted to protest again, but the feeling of Peashy's soft body and breast made him decide otherwise and he moved his lips in tangent with hers.

Kuro's hand found her right breast, cupping it and lightly squeezing down on it to feel it up. It was warm, soft, squishy... and the first breast he's ever touched. His cock was already rock-hard and throbbing inside his pants at this point. Carefully, Kuro stroked his hand across her breast a few times, feeling the shape, the weight, the smooth skin. It felt so nice, it almost made him forget how risky and stupid this was.

Then, his fingers found her nipple, and Kuro just couldn't help but stroke it a little. He ran his finger around the little nub a few times, before taking it between his thumb and index fingers and squeezing just a little bit. A soft moan escaped Peashy's lips. Emboldened by the sound, Kuro brought his other hand to her left breast and squeezed it gently, causing her flesh to bulge out between his fingers ever so slightly, while caressing her right nipple some more, rolling it between his fingers.

"O-O-O-Onii-cha-a-an~" she moaned again, and shifted her position a little with a squirming motion. Kuro put both my hands to use squeezing and massaging her nipples, doing what felt good to her. Apparently, the boy did a pretty good job, because her nipples were slowly stiffening under his ministrations, while she continued letting out occasional moans and making occasional squirming movements.

"Y-you can… kiss them, too~" Kuro couldn't take it; he soon found himself leaning forward and taking her right nipple into his mouth. Sloppily covering her entire areola with his open mouth, he started frantically lapping at and flicking her nipple with his tongue, trailing circles around it and getting it all wet and slippery with his saliva. It felt so good that he couldn't contain himself.

After what only might've been a few seconds or a few minutes, he really couldn't tell, Kuro switched to suckling on the other breast, while bringing his hand up to continue squeezing and fondling the right. Peashy's breathing had gotten heavier and her moans more frequent. When Kuro finally found the willpower to pull away from her delicious chest, he noticed that she, in addition to panting and softly moaning, was squirming her legs, rubbing her thighs together.

"Onii-chan, please lick me down here…" she asked and slid out of her panties, Kuro taking note of the huge wet spot on them. Sliding his hand away from her breast, down the gentle curve of her stomach, he felt the fabric of her panties, the only thing still separating him from his target. After a moment of hesitation, Kuro slipped his fingers inside. Trailing a little further down, he felt the immense heat coming off her crotch, and noticed how wet and sticky it was.

'She's soaked…' he thought as he squirmed his finger into the entrance between her slightly-parted lips. After the initial resistance, it went in rather easily, and before Kuro knew it, his whole finger had disappeared into Peashy's pussy. Pulling it out again, he knew it was covered with her warm, slippery fluids now.

He began slowly sliding his finger in and out, making a soft wet sucking noise every time it came out. Kuro felt little beads of liquid running from his finger down across his hand, as a sweet-sour scent came wafting up at him from her position underneath him. The scent surprised him at first, but once he's taken a good sniff, it only made him even more eager.

Meanwhile, Peashy was squirming and panting her arousal, even more so than before, and her moans were louder and more frequent. Occasionally, one of her moans even sounded like she was mumbling "more…" or "yes…"

Kuro felt her inner walls clench, signaling an incoming orgasm. He pulled his hand from her panties, got up off the bed and wrestled out of his pants so hastily that he almost got his legs entangled. His shirt followed, and then his boxers, setting his eager rod free to stand hard and proud.

Now butt naked, he positioned himself on top of Peashy, between her spread legs. His cock was already resting upon her mound, the direct contact eliciting a moan from both of them. Beginning to feel determined, Kuro reached below and lined up the tip of his cock with her entrance, ready to slide inside.

"P-ko? I'm going in," he warned. He only received a nod from her while she lovingly gazed at him, fully intent on having him take her virginity.

Kuro leaned forward until his bare chest pressed against Peashy's soft breasts, and kissed her. After a few seconds of holding the closed-mouth kiss, she parted her lips. He took that as an invitation. His tongue slithered into her mouth at the same time that he thrust his hips and slid his cock into her tunnel. Warm, wet, and tight, her tunnel wrapped around the whole of his shaft so tightly, it fit like a glove.

"HNNNNGGH~!" suddenly, Peashy's cavern began convulsing and it spurts out juices that coated his roof as it remained lodged in her.

"Did… did you just cum from me putting it in?" he asked after separating.

"Y-yes. I'm sorry…"

"Don't fret. I was just surprised," he placated her. But the time for talking was again over as he slowly pulled back, a long, wet, sucking sound as his cock slid out of its sheath until only the head remained inside. Peashy softly moaned into the kiss as their tongues met inside of her mouth and started lapping and slithering around each other. Her hands came up, sliding across his sides to end up on his back, holding him close. Kuro was using his arms to hold himself up, careful not to crush her, though keeping close enough that he could feel her soft breasts and hard nipples against his chest.

As he pushed back in, the way the walls of her tunnel stroked against his sensitive head already had him twitching his legs. Kuro had never felt anything like this before. He broke the kiss, desiring to look her in the eyes while he did this. She was panting, sweating, and smiling.

Keeping his eyes locked with hers and his face close enough that he could feel her warm breath, Kuro started humping her, thrusting his hips back and forth slowly and deliberately, as not to stimulate himself too much. She let out a soft moan every time he pushed in, and she was constantly squirming her hips, stirring his cock around inside of her. Her breasts gently moved up and down with her heavy breathing, rubbing her hard nipples against his chest.

"I think… I'm cumming again… Onii-chan!" she cried after what must've been ten or so thrusts. Kuro involuntarily doubled over, resting his head next to her with his chin upon her shoulder. His cock violently throbbed inside of her as he came.

"Aaah~! You're cumming inside me~" the sensation of Kuro's orgasm made Peashy do the same. Sticky white substance was poured deep into her womb, the owner far too caught up in the moment to worry about pulling out.

His orgasm subsided just in time to start feeling the sensation of two massive mounds putting his cock in a vicegrip. Peashy, now Yellow Heart, pressed his cock between her big, I-cup titties. He thrust his cock between them. She held the sides of her bouncing breasts and slid his groin into them.

Not even in her dreams could Yellow Heart have predicted having a chance at having this experience with her. Especially with the one she loved so much.

Kuro felt a tingle in his balls. If he didn't stop soon he was going to blow a load all over her! "Peashy, I need to… I need to… I've got to stop."

Yellow Heart was confused at first before it started to make sense; "NO! Please don't stop. Keep going, Onii-chan. Do what you need to do. I love you. I want you to cum lots!" she grabbed her breasts and crushed them around her man's hard member.

Kuro grunted and buried his dick between her big boobs and started shooting his load. He covered her breasts with cum. A few blasts stretched all the way to her neck and one of them splashed the bottom half of her face. Yellow Heart tasted his seed and didn't feel the least bit ashamed of it.

Without any sort off hesitation, Kuro let his hips push his cock back inside of her. "Mm…" She moaned immediately. Her hips bucked forward, desiring more of his length to fill her. Her head rolled back against the pillow, her eyes rolling in response to the pleasure. Her hand rested on his head pushed his face against her neck, letting his tongue and lips leave trails of saliva as he kissed and licked down to her chest.

Slowly pulling out, he felt her body respond with desires for him to not move away too far. Her legs locked around his waist, tensing and pulling him back in. Her chest rose as his cock pushed deeper. Oxygen filling her lungs, just so she could moan it all out as his pelvis hit hers.

"I-I… This is… so…" She began, but couldn't finish, Kuro rocking her body harder than before. He pressed his body down on her breasts, feeling the soft mounds squish to his chest. Her walls tightened around his shaft the deeper he entered, her thighs tensing as he wriggled his hips before attempting to pull back.

His tongue lapped over her left nipple, letting his saliva find a new home. He glanced up to see her normally cheerful and childish face red and panting. He allowed his lips to envelope her nipple, using his teeth to lightly tease the erect nub. She moaned loudly and pushed his head into her breast further, wanting more. So much more.

Her hands travelled over his back, nails digging into him whenever she felt a spike of startling pleasure. He didn't care about the pain; he simply found it to be arousing. His tongue ran over her breast, licking up to her neck before letting his teeth and lips nip at her skin. Each time his mouth pinched her, she let her nails claw along his back, her hips rising and legs tightening around his waist. She just wanted as much as he could give.

Pounding into her tight pussy, he groaned under his hefty breath, his hands exploring her body over and over again, found a place to rest at her sides of her stomach. Toes curling behind his back, she released a low purr, her eyes combating her heavy eyelids while she panted hot air into his spiky scruff atop his head. The nipping at her neck and the drumming within herself was overwhelming her mind.

"O-Onii-chan~!" she cried, her mouth lowering into his hair, breathing wildly. She could feel his cock throbbing deep inside, every thrust taking him one step closer to climax. With a much lower voice, she huffed closer to his ear. "Don't stop… Don't ever stop~! It feels so good~!"

Yellow Heart wailed and moaned, throwing her head back countless times on impulse. Her throat wanting to keep moaning, praising the boy. Her body wanted to continue soaking in the pleasure, finding her limit closer than expected. Her mind wanted him, over and over again, all for love and lust.

Her thighs began vibrating while Kuro continuously slammed all the right spots. She was going to cum and she wanted, no, she needed him to know; "Keep going… I'm going… G-Going to…" She swallowed the saliva building up in her throat, desperate to tell him for her own sexual satisfaction. "Onii-chan! I'm going to c-c…"

"Cum, P-ko," He muttered, nipping at her jawline, closing in on her ear.

As if she could control it and wanted nothing more than to appease him, her hips bucked one more time before her body began to quiver. A surge of her sweet nectar decorated Kuro's pelvis, her thighs and the bed comforters. She whimpered, her orgasm cutting her volume down as her lower half couldn't stay still, shuddering to his cock's motions. Her fluids wouldn't stop squirting.

"Hooaahhhh~" Moaning while gasping for more air, Kuro grinned at the arousing sight.

Now it was his turn to climax, his erection throbbing again and again; ready to fill the CPU with his seed. It didn't take long for his semen to begin pouring into Yellow Heart as he groaned out her name into her neck, his voice low and rough. His thrusting slowed right down to one forceful strike ever few seconds, but he was shooting thick strings of cum every time his pelvis hit hers.

She felt the warmth radiate through her core, sending her to a further high. With flushed cheeks and a dopey smile, her arms went limp around the back of his neck as his hips came to a halt. Slowly, he lifted his head from the warm, but saliva-coated neck of Yellow Heart and hung his head above hers. Her soft amber eyes, lightly panting lips and cosy atmosphere all drew him in for another long kiss.

"More~" she pleaded. "One more round~"

They stayed still for a moment, just enjoying the feeling of being truly connected, before Yellow Heart experimentally gyrated her hips against his, drawing loud moans from both of them. The feeling of him filling her up completely was something Yellow Heart knew she could never re-create in a thousand years and she loved everything about it. It was as if their bodies were made for each other, like puzzle pieces finally being put together. For a while they remained like that, Yellow Heart gyrating her hips against Kuro's, both of them completely satisfied with the amazing feeling, and neither of them wanted to stop for a long while.

Kuro started thrusting again. Her pussy was like soft, warm, wet velvet surrounding every single inch of his being, and he never wanted to stop. Yellow Heart was too away from the world to answer, every single thrust inside of her felt like Remnant had exploded, and it might as well have exploded. She and Kuro were the only people in the entire world at that moment, and she wanted to go even faster. Their pace increased, the blonde goddess coming down to meet his hips every time he thrusted into her. Their moans mixed together as Kuro felt himself nearing his limit for the third and final time.

Yellow Heart arched her back, fighting to regain cognisance as she too neared her limit. Neither she or Kuro had used protection, and her heart was screaming that she wanted him to finish inside her.

"Onii-chan" *pant* "You're," *moan* "Going," *pant* "to," *groan* "Make," *moan* "Me," *shudder* CUUUUUUUM!" Yellow Heart threw her head back and screamed as she came again, her back arching even further and her juices splashing down onto their hips as Kuro thrusts into her one last time before he came too.

Moaning each other's name, the pair orgasmed together, Kuro pulling out just in time, shooting his seed all over Yellow Heart's insides again. Thank True Goddess for CPUs not being able to get pregnant!

Yellow Heart turned back into Peashy and collapsed next to Kuro as she came back down from her high, out of breath but otherwise feeling absolutely amazing.

"U-um, I-I-I… ca… rus?" she called nervously, not being used to calling him something other than 'Onii-chan.' When he turned to look at her his eyes full of happy contentment, her cheeks turned bright red as the words escaped her mouth. "Will we… get to do this… again… sometime later?"

Kuro looked upon her and bonked her head; "Duh. I love ya, P-ko. And, yes, in the way you want me to."

"I love you too, Icarus. I love you more than anything in the whole wide world~" she could feel tears of happiness gathering in her eyes again and she did nothing to stop them, she was just so damned happy.

They snuggled together underneath the blankets, too exhausted from their little escapade to think about cleaning it. Kuro was naked and so was she, not that they cared, anyway. She was quietly calculating how many more chances they might have to sleep together as she slowly drifted off.

Alright, time to move the RWBY lemons over to this profile, so… Thank you, everybody, for reading this new chapter! Please make sure to follow, favorite, and drop in a nice, little review for me and I hope to see you guys again with a brand new chapter.

Next Time: Roomies for Life (Kuro x Adult Neptune)

~ Peace! And Happy Halloween!