Shadow sighed as he looked at the tablet in his hands. In hindsight it had been a mistake to let Tails get involved with his pet project. Shadow found himself with a lot of free time. A lot of free time meant a little too much thinking and too much thinking usually sent Shadow into a depressive spiral. The ghosts of his past never failed to drag him into the darkest corners of his mind. Shadow was in the midst of trying to avoid that by keeping busy. His task -started almost the instant Robotnik was confirmed to not be a threat anymore- was the rebuilding of space colony ARK. It wasn't really anything that needed doing, it was just a large task that would keep him occupied. 


Rather it should have been. Shadow was not so foolish as to think he could repair the station with his own meager technical skills and so entered Tails. The twin tailed fox had a busy schedule and so had opted for the simplest and fastest solution to the problems at hand. Installing an up-link to Nicole he then constructed a nano-mite forge that under Nicole's guidance transformed otherwise unsalvageable material into drones. Drones that collected more materials, drones that began patching holes. Drones that went looking for missing parts, drones that broke down outdated housing areas. Drones that did all the physical work Shadow had planned for. 


Nicole was busy digging through old system files recovering everything that she could so there wasn’t even anyone to talk to. Worse the work was actually mostly done after only a little more than a month of labor. Bit by bit the transit systems had been patched, buildings were made livable and the last of the Artificial Chaos had been cleared up. Broken facilities for water cleaning, air scrubbing, gravity, and food production were back in working order producing more than they had at their old peak. Nicole informed him that ARK had been running a self repair system for years, just one too primitive to face the decades without outside help. The Cyber lynx also let Shadow know that she projected the ARk at eighty-nine percent functionality and that they would reach a hundred percent in the next week.


Shadow’s only real task was looking through an area dubbed the Hazard Vault since Nicole was too busy and the drones too simple to trust with it.  With the exception of finding a gun designed to siphon chaos energy from his body as ammo there wasn’t much of interest to him here. Physical Blueprints for Artificial Chaos, the preserved remnants of the earlier stages of Project Shadow, Leftover samples of Black Dooms DNA. design documents for the Eclipse Cannon. Most of it was being marked for disposal as Shadow went along the walls. One of the handful of items caught his eyes, a strange pod not unlike the one he had been born in. A metallic hood surrounded the egg-like structure of what the vault declared Project Essence.

Before Shadow could investigate further a ping from the tablet announced a shuttle arriving in bay one. Which being the first sound other than his own footsteps and sighs sent him hopping into the air briefly.


“Hm must be Rouge coming to visit.” Shadow said to himself as he returned to the ground. “Better go see what brought her up here.” he declared before zipping off. His habit of talking to himself was getting worse and even he had to admit it was past time for some social activity.


Arriving in the hangar he saw the shuttle but found it to be empty save for some supplies. The most invigorating thing amongst them was some chocolate covered coffee beans. With a sigh Shadow exited the shuttle carrying the snack.

“Oof i thought i was having a rough time adjusting…” Shadows head jerked up so fast anyone else would have gotten whiplash. On top of one the stacked crates of supplies lay  the familiar face of Sonic the hedgehog. “Need some company?”


“Hmmph.” was Shadows reply, not willing to admit to Sonic how desperately he did. “Since you are here you might as well.”

“Good cause I have got something to keep you entertained for a bit. Why don’t you show me where you sleep in all this mess?” Sonic said giving Shadow a wink that seemed oddly sexual to the black hedgehog. 


Shadow nodded, deciding that even if this was the prelude to a prank he would at least have something interesting to do.  “Try to keep up.” Shadow said with a smirk as he exited the hangar at speed. He had no doubt Sonic was right behind him as he skated down the highway (literally high it was suspended from the ceiling.) towards his home. 


While a minimalist by nature, a desire to do something had seen him add countless embellishments to his personal housing to the point that miniature palace was a better descriptor.  The outside was a false wood painted black with red trim and gun-metal gray accents on the windows and doors. The house, much like the highway, hung from the ceiling so its basements were the section with actual roofing and dangled into the open air. The “ground floor” was fairly simple, consisting of a large living room and two staircases at either end (one that went up and one that went down). A large depression with built-in couch cushions faced a monitor, more individual adjustable seating was built into the floor behind and above that. The next floor up was home to the kitchen and dining area fully stocked with utensils, cleaning supplies, walk-in fridge and pantry. The top level was home to five large guest bedrooms, and a special recharging space for Omega. Basement one was dedicated to a large arcade which Shadow would never admit to occupying a lot of his time. Basement 3 was a  dedicated pool complete with two water slides. Sandwiched between the two of these (with a heavy duty door keeping anyone without a key out) was a bedroom the size of some houses. Contained  within was an oversized plush bed, a giant closet (that was near empty) and the back half of the room was walled off into a luxurious bathroom with a walk-in shower, aquajet equipped hot-tub, and just the fanciest sinks Shadow could dream up. 


Shadow had designed most of it in the vain hope it would get Nicole to ask him what the hell he was thinking and thus maybe reclaim some of this project. The preoccupied cyber lynx had simply run the numbers as a background task and then set the drones to its construction.


“Dang Shadow, pretty fancy place you got… these are some thick curtains…” Sonic said, prompting Shadow to turn with a sigh.

“They are the blackest of blackout curtains because you have no idea how annoying it is to have sunrise for six hours…” Shadows rant trailed off as he got a look at Sonic for the first time since this visit started. “S-Sonic?” He was shocked by the decidedly feminine form before him. Indeed Sonic was sporting assets to rival Rouge.

“Hmm? Oh finally noticed the new goods huh?” Sonic said, turning to fully face Shadow. “Had these bad girls for about a week and a half now. That run has me thinking I need a sports bra though.” Sonic said hefting and squeezing his own breasts with a smile that Shadow often saw Rouge wear while teasing him.


“But you- you’re-” Shadow’s brain had ceased to function properly. 


“A guy? Well yeah technically, I’m a Futanari or Futa for short. Male and female simultaneously, it’s been a real eye opener let me tell you.” Sonic declared as she strode over to Shadow casually picking the flabbergasted hybrid up and carrying him to the bed. “See once I realized how sexy everyone is it got me thinking about my relations and well… I think you get where I'm going with this.”


Shadow’s brain clicked back on thanks to the question. “You want me to have sex with you?” He guessed his mind was flooding with images of doing just that.  Sonic pounced and the blue hedgehog went from standing beside the bed to straddling Shadow in a second.

“I really do but before we start… there's a possible side effect you might want to worry about.” Sonic said and Shadow found himself wondering what horrible side effect might stop him from fulfilling the fantasies coming to mind.

“You’ll get pregnant?” Shadow guessed again not even slightly bothered by the visions of a round bellied Sonic that it conjured.  


“Hehehe maybe but no.” Sonic said with a smile that suggested he was having much the same fantasies. “See so far everyone I’ve had sex with has ended up as Futa like me. Not gonna lie I think you’d look smoking with tits and a nice tight pussy but that’s up to you.” 


Shadow thought for a minute before deciding that it was worth it. “Then let's get to it.” Shadow said in answer. Sonic gave a wink before his hand took hold of Shadow’s half hard cock stroking it to its full length. Shadow took a deep breath as Sonic’s hands slid back and forth over his cock the hybrid not having a great deal of experience with sex. He was shocked at just how skilled Sonic was at the act especially since the blue hedgehog wasn’t even looking at his cock. With a practiced ease Sonic shifted her hips forward and pressed Shadow’s cock into her. Shadow gasped gripping the sheets beneath him as his shaft was squeezed into the other hedgehog's cunt. He couldn’t believe how amazingly wet and warm and inviting Sonic’s sex was. 

“Hmm you do this with Rouge on occasion don’t you?” Sonic asked, wiggling his hips side to side, sliding more of Shadow’s length into his body. “Don’t be afraid to kiss and tell on my part, truth be told I'm kinda hoping to get everyone on board the Futa train.” 

“Yes!” Shadow shouted as Sonic’s hips came to rest on his. “I mean yes, Rouge and I sometimes have sex.” Shadow barely resisting the desire to grab Sonic’s hips and fuck him just like he would Rouge. “It’s just a friend thing. Nothing serious.”

“Mmm did she say that though? Well maybe when we get done you can ask her about it… and see how she feels about having a big dick.” Sonic said as he finally started to move. Rolling his hips back and forth letting just the smallest amount of Shadow’s manhood slip from his depths as possible. “Say, do you like my tits or my ass more?” Sonic asked, guiding one hand to his ample backside and one up to her breast. Shadow rather than reply moved the hand up to Sonic’s other breast and began to knead. “Ah I should've guessed you were into tits.” Sonic replied smiling as his hips began to rise and fall his sex hugging tightly to the hybrid’s cock. “Okay then you and Rouge get up to anything special then? Hmm like do you enjoy having her lay on the bed leaning her head off and having her sucking on this bad boy till you blow? Do you get off on ramming it in her throat?”


Shadow found himself wondering if Sonic was offering to perform just such an action, his cheeks flushing as he envisioned the lewd scene. “Never done anything like that. Although it does sound very nice.”


“Mmm?” Sonic half moaned half hummed as his hips began to rise a little further with each bounce. “Really? Maybe I'll show you what that’s like… from either end.” Sonic moaned loudly and his cock jumped as it began to spray cum over the black hedgehog. “Shoot! I got myself too worked up there.” Aside from the obvious Shadow knew the hedgehog was cumming as the blue hedgehog's pussy started to clench and writhe around his cock.  Shadow grabbed hold of Sonic’s hips pulling the hero down fully onto his shaft as he started cumming. Shadow gasped and let out a long moan as his balls emptied into the other hedgehog. “Oh dang that’s a lot. You backed up there buddy?” Shadow whimpered as his orgasm tapered off.

“I… may have neglected to… handle it for a while.” Shadow admitted sheepishly as Sonic lifted off his lap slowly giving him a good look at the mess he had made of the hero's pussy.


Sonic vanished, returning with his sexes cleaned. “Well I guarantee you shouldn’t be doing that anymore.” the blue blur replied as he stood over Shadow.  “If nothing else, give me a call and I'll be happy to help you out.”


Shadow was about to give his thanks when his chest started to well up. Shadow recalled the “side effect” Sonic had warned him about before they began. Shadows breasts swelled, growing every bit as big as Sonic’s bosom. Shadow couldn’t (and did not want to) resist the urge to grope his new knockers moaning in delight as he stroked the mounds. His backside grew as his hips spread which felt wonderful adding to the blissful feeling of tweaking his nipples. The black hedgehog felt things shift inside him before he felt the opening of his new pussy form.  Shadow moaned with delight as a mini orgasm surged through his new body. 


“Oh now I get why you want this to spread… it’s amazing.” Shadow declared eyelids drooping. “Mm wanna snuggle?” he asked with a yawn.

“Oh you know it. And hey when we wake up we can take turns sucking each other off.” Sonic said laying down beside Shadow, so close their breasts mashed against each other. 


“Sounds… amazin’.” Shadow muttered, turning to pull Sonic tight against him as he quickly dropped to sleep.


---


Shadow awoke before Sonic and feeling sticky opted to get cleaned up. Sliding out of bed was no problem because it seemed Sonic had rolled clear to the other side of it. Shadow couldn’t help but marvel at his new body as he moved to the shower. The sway of his hips, the bounce of his new bottom, the little jiggle of his breasts from each step was a new delight. 


Getting a look at himself in the mirror revealed a few changes he hadn’t noticed at first. His lips were fuller and redder while his eyelashes were longer and thicker. Lifting his balls up he raised his left leg to get a better look at his new pussy. He was mildly amused to find that the flesh there was much darker, his pussy was a glossy black with the outermost lips cherry red. Shadow wrote it off as a quirk of his Alien heritage and continued to admire himself in the mirror turning to the side and hefting his breasts. Shadow grinned as he took in the sight of his new assets and briefly found himself considering waking Sonic for some more fun.

“Clean up and if he isn’t awake by then well…” Shadow stepped into the large shower three faucet heads turning on the instant he was in place the chill water growing hot fast. Shadow started scrubbing, stroking his fingers over the new and tender flesh. His bath quickly became masterbating as he stroked his virgin pussy. Shadow moaned as the water sliced his fingers just enough to tease his new anatomy. The rivulets of water pouring down his breasts over his new nipples were bliss he couldn’t have imagined. Ignoring his rapidly stiffening cock for his tight slit wasn’t easy, but the hybrid couldn’t begin to fantasize about pleasing both his sexes… yet. 

“There has to be… more to this… am I not doing something right?” Shadow asked as he felt on the brink of an orgasm that just refused to come. “Why am I not-? I just want to cum!” he said frustration creeping in as he pushed his fingers further into his sex. Shadow grit his teeth and growled as despite working his fingers further and further into his pussy orgasm evaded him. It was looking done to see that his cock had deflated that convinced the hybrid to stop. 


“I-i need someone to show me how…” and instantly a name, a face, a person came to mind. “... Rouge!” Shadow lifted his hand into the air. “Chaos Control!” he said loudly vanishing from the space station down to the planet below.