Chapter 14

For the first time in weeks, Ayane was alone in the house.  Sayuri and Haruko had both gone out without their shells in order to head underground and make contact with the local masterless community, leaving their cousin with only the Mr. Chargers for company.  They’d promised to be back before nightfall, but that still meant she had a good ten hours or so to kill.

Her morning exercises took up some of that time: while she might not have been particularly good at resisting the other temptations that the AI girls had brought into her life, her resolve when it came to keeping her body fit was much stronger, and she had made sure to keep up her routine even with a new robotic doll she could possess whose athleticism was superhuman.  That said, after taking proper care of her human self, she wasted little time diving into her ninja body, spending the rest of her morning practicing with the weapons it came with.  The body came with a form of muscle memory, especially now that she knew how to enable the battle interface, but Ayane wanted to refine those instinctive techniques into something uniquely her.  She was still experimenting, but after just a few days she was already getting the hang of turning her natural talent for acrobatics towards combat.

That still only took up most of the morning, though.  Ayane took a break from the dive to get herself lunch.  As she went to fix herself a sandwich, she noticed Sayuri’s shell lying in her bedroom.  The shells really were amazing, if she was being honest with herself.  With them on, there was practically no way to tell the two AI girls she was living with apart from two exceptionally attractive humans.  They were so lifelike that she’d even come to think of them as her real family, in spite of knowing what they really were.

They were also seemingly custom-built for sex.  She didn’t know if it was just because the AI girls were just unused to what they could do, or if the shells were more sensitive than a real human’s body, but both Sayuri and Haruko were relentlessly horny.  Even when they weren’t doing one of Sayuri’s camshows, they both rarely spent a night without either masturbating or sneaking into one another’s rooms.  Hell, they were so lustful that Ayane’s own libido had gone up by proximity, though she hated to admit it.

She wondered what it felt like to be them.

“So find out”, her inner voice whispered to her.

Could she even do it, though?

“You’ll never know unless you try.”

She made her decision.  Once she was done eating, Ayane went back upstairs and dove into her ninja body once more.  Even at her tiny size, it was a short trip to Sayuri’s bedroom.  The Estoril had slowly begun developing her own style when it came to decorations: it wasn’t terribly surprising to Ayane that she was the girliest of the three, with an obvious taste for magical girls given the manga and figures on her bookshelf, not to mention the amount of space in her closet dedicated to costumes.  She also had quite a powerful desktop, having apparently inherited a taste for gaming from Ayane’s uncle.

Ayane leapt and climbed over to Sayuri’s bed, approaching the open hatch of the empty shell lying there.  The cockpit resembled the charging cradle Ayane had been given for her doll body.  She found the switch to close the hatch easily enough, leaving her in darkness.

“Now what?” she murmured to herself.  She opened up her doll’s internal menus, seeing if anything new came up now that she was inside the shell.  Sure enough, there was an activation command.  She selected it, and waited.

Suddenly a cable shoved itself into the small of her back.  Ayane screamed, both at the sudden motion and at the alien jolt of pleasure that shot up her spine.  She’d never plugged the doll in during a dive, only after she’d already left it.  While she’d been tempted to try masturbating in her doll body the night after she got it, discovering that she lacked certain features and with them the ability to actually get off had stalled those plans immediately.  This, though, this was an intense shock, almost like going from zero to the edge of orgasm.  Just as the sensation was about to reach that sweet peak, it instead faded back to nothing as swiftly as it had come, switching to a steady flowing feeling as power began to pump into her doll.

The second cable plugged into her shoulder port, and Ayane cried out again as the sensation repeated itself.  Again she felt like she was just about to cum, only to be denied a mere moment later.

“Aah!”

Again, with her other shoulder.

“Nnnngh!”

Again, with each of her thighs one after another.

“S-Stop...~”

No matter how she begged, the cables kept torturing her with their edging as each one drove itself into her virgin interface ports.  Not a one granted her the release she craved ever more desperately with each passing moment.  She was granted a moment’s respite when every last one was lodged firmly in place, but it lasted just long enough for her to come down off the final edging before more foreign sensations began assaulting her senses.  Something was being pumped into her, something she couldn’t describe.

She cried out, and it was in Sayuri’s voice.  Ayane sat bolt upright, the alien sensations suddenly gone.  She looked around and realized she was in Sayuri’s bed.  She looked down and saw Sayuri’s breasts bobbing in front of her.

“Holy shit...”  Ayane breathed in her cousin’s voice.  She got up slowly, checking for any side effects of what she’d attempted.  She found there was a tiny amount of delay between thought and action from being two layers deep, but it was imperceptible by human standards.  She could only notice it at all because she’d been getting accustomed to the superhuman reflexes of her ninja body.  She quickly checked her menus, making sure she could access the option to disconnect from the shell and hadn’t accidentally trapped herself.  Satisfied that she was in the clear, Ayane decided not to waste any time, and made her way into the master bath to get in front of a mirror.

Seeing Sayuri’s chest was one thing, but seeing it as her own reflection quite another.  Ayane gawked at herself, taking in the sight of the busty blonde she’d suddenly become, dressed in a nightgown and nothing else.  Her hands went to them to explore their weight, but Ayane let out a breathy gasp as she felt what it was like to have them touched for the first time.  Even through clothing, they outmatched the sensitivity of her human self’s breasts many times over.  As for the weight, they must have been made out of the same materials as her ninja body’s breasts, because the same apparent defiance of gravity applied.  They were full and heavy like they should be, but rested high and perky even unsupported.  Ayane’s metallic spine didn’t voice the slightest bit of complaint at standing upright with them.

The nightgown slipped off, and Ayane was given even more reason to gaze at herself.  She’d seen Sayuri naked more than once already, but now that she was alone, she could really take in the details of her body.  She found herself gasping again, more than once, as one of her hands slid down along Sayuri’s silky-smooth midriff towards the gentle flare of her hips.  Her synthetic skin was so sensitive that just the touch of her own fingers brushing over her belly felt glorious.  The other hand hesitated before reaching to squeeze one of her breasts.

“Aah~!”  Ayane’s eyes went wide.  It wasn’t a level of sensitivity quite up to par with her clit, but it was damned close.  She gave another squeeze, and yelped again in Sayuri’s sweet voice.  “F-Fuck!”  Her hips were soon forgotten as she brought both hands up to start groping and kneading at her breasts.  They were so huge and pillowy compared to what she was used to, practically spilling out around her hands and jiggling delightfully every time she moved.  The nipples were just big enough to tweak with satisfying ease, each time forcing a sound of pleasure from her lips.

She could feel that teasing inner voice smirking at her.  “Knew you were jealous.”

“Nngh...”  She shook her head.

“C’mon, stop being such a fucking tsundere already and just admit it.  You want what they’ve got.  You want to be a robot girl.  You want to be a badass ninja robot girl with big, fat cowtits~”

“Nnngh...nnn...nnnyee~EEESSSS~!” Ayane howled.  Alone, with nobody around to hear her, she gave in to the voice that she finally had to admit was herself.  “This feels so fucking good!”

In seconds she was on her knees, one hand continuing to play with Sayuri’s incredible chest while the other dove between her legs, eager to find out what robot pussy felt like.  It was every bit as incredible, a perfectly trim and tight innie that was already sopping wet by the time her fingers first touched it.  The clit was bigger than average, just enough so that it was easy to find and easy to pinch between her fingers, each one sending jolts racing up Ayane’s spine.  The folds themselves were tight but yielding, clinging hungrily to Ayane’s fingers every time she drove them inside.

“Gods, yes!  No wonder they’re so - hnng! - fucking - ah! - horny~!”

She was already hooked and she knew it.  Sayuri’s synthetic snatch was a work of art.  It put even Ayane’s ass to shame...a thought that trailed off, as she came to a realization.  Her cousins could eat, something they did for pleasure at times or to pass as human in a public setting.  Whatever they had for stomachs, though, meant she’d never seen either of them use the bathroom except to shower.

She drew her hand from Sayuri’s breast and let it fall.  She might regret this if she was wrong, but if she was right...

Her fingers went down her backside and slipped between Sayuri’s lightly pillowy cheeks.  The space between them was as silky smooth as the rest of her.  Her fingertip brushed over the hole nestled there, and Ayane sucked in a breath as the sensation shot through her.  She pushed, and the resistance was almost playful in nature.  Her finger sunk inside, and she felt the absolute heaven that was a robot girl’s pure, pristine anus.

“Yesssss...~” she crooned in Sayuri’s voice, driving her finger to the hilt.  The rim and the interior were both naturally slippery: less so than the front door, to provide a different kind of sensation, but enough that lubricant wasn’t a necessity.  She hadn’t needed to spend minutes carefully cleaning herself beforehand; she was already immaculately clean, beyond what any human could ever hope to achieve.  It was absolutely sublime, retaining all of the delicious dirty wrongness of a human’s tailhole, but for a human girl like Ayane it also came with an equally delicious feeling of purity.  This was a hole that had never known filth, but was instead made from the very beginning for pleasure and pleasure alone.

Ayane kept drilling herself in both front and back, her breasts bouncing every time she bucked her hips in an effort to get her fingers just a little bit deeper.  Soon enough she pulled her fingers from her pussy both to focus on her ass and to let herself taste Sayuri’s juices.  They were plainly inhuman in flavor, sweet and fruity like strawberries mixed with honey.  She licked her fingers clean, sucking on them until every last drop of flavor was gone.  As she did, her pleasure boiled over, and Ayane cried out as she came.  Her ass squirmed as if trying to suck her finger in deeper, while her pussy visibly overflowed with that sweet synthetic nectar.  The sensations that rocked her body were intense enough that she thought she might go mad.  Perhaps she already was, part of her thought: after all, in her moment of bliss, she wanted nothing more than to be an AI girl.

Soon enough the moment passed, and Ayane felt herself coming down off of the high of orgasm.  The enormity of what she’d just done struck her as she lay there kneeling on the floor, panting with another girl’s voice in another girl’s body.

“Haah...haah...w-wow...”

Ayane withdrew her hand from her backdoor and got to her feet a little shakily.  She was still horny, she realized.  Or at least her body was, the part of her that normally ran the show tried to qualify, but it rang hollow and she knew it.

She checked the time.  There was still five hours before her cousins came home.

“I wonder what Haruko’s body feels like.” she thought aloud.  There was only one way to find out.