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Vash was curled up in the living room, trying to watch something to calm him down. His brother Nai had left for some house party with Legato and Elendira hours ago. He'd begged him not to go after days of feeling eyes on him. But of course Nai just blamed it on watching too many reruns of Alien and other sci fi horror.
It wasn't his fault that it was his favorite genre!
But reruns of Friends can hardly calm him down. Not when the storm outside had only been growing in intensity. Any moment now, he's waiting for the text from Nai that he won't be home because of it. Their mom was already in another country for business. Nai never understood how much Vash relied on him - he might've been twenty five and too old for a fifteen year old Vash, but Vash leaned on him for so much support.
What came first, though, was a loud CRACK that made the house shake.
Soon after that, the electricity went down.
Great . He's going to be so brave walking out of the dark living room. And yes, Vash is going to be so much more brave walking up the stairs. Man, this had to be cosmic retribution for running away at thirteen. And fourteen.
Ugh .
Vash wraps himself in the thick, tiger print blanket. Just, like, two hundred steps to my room. Easy-peasy . He makes it as far as the doorframe of the living room before he feels eyes on him. And when Vash looks up, through the brief flashes of light from the storm, he sees a tall figure. Blond hair.
Oh!
“Nai -?”
As soon as he opens his mouth, the figure steps forward.
He freezes.
Which was fucking obviously not the right move.
The figure runs at him and catches him midway up the stairs, and it's just a flurry of movement that makes Vash dizzy - holding him down, staring him down, neck to the fifth step of their carpeted stairs. In the darkness, he can make out a face that's kind of familiar as his own older brother that freaks him out. The intruder pulls down his sweats and underwear and just gives this annoyed sigh.
"You're human ." There's a sneer to those words, almost vibrantly white teeth cutting through the darkness. “Whatever.”
Vash's brain is stumbling over its own feet. This has to be a prank. A really gross prank but -
"Wuh - what?"
"I can work with this.”
Vash doesn't have any way to question that before everything turns too bright. His body feels like it's being sucked through a tiny straw. The last thing he sees is the popcorn ceiling of his house. “How is he, doctor?” Knives steps into the exam room with a sense of excitement. “Does he seem like a good match?”
Conrad gives a hum of agreement. Beneath him, strapped to a table and spread-eagle, is the Vash he had grabbed. The boy had seemed the most agreeable out of the dozens he'd surveyed. Small, confident enough that he wasn't boring but not too much so he was annoying and he had exactly what his Vash had. A beautiful cunt.
And as Knives looked at him more, he noticed something.
His curiosity was evident enough that Conrad made another sound.
“Yes, you'll see that… Well, I believe dragging him across dimensions tweaked him.”
Where once Knives had seen a pussy with a thick thatch of hair, there were now the barest hints of a flower blooming there. Red and green, like carefully maintained geraniums. Oh, it would have made Rem proud.
“Interesting.” He said. His fingers itched to explore. Knives held himself back. For now . “Did you prepare the examination kit?”
Conrad gave him a knowing look. “Of course, Master Knives.”
“Then leave me for now. I'll call you when I want him taken back to his room.”
With a nod, Conrad swept from the room.
Alone, Knives could hear the beep and whir of the machines hooked up to Vash. But his eyes were solely on the boys’ flower - Knives did let his eyes wander to his face. Serene, youthful and beautiful. Different in many ways from his own. But unmarred by cynical years of survival.
He touched Vash's legs like a sinner seeking forgiveness at the altar of a merciful God. Creamy white flesh that was soft and supple. That begged to be bruised. But he'd wait for him to be awake for that. He wanted to have his pet cry out for mercy, and in pleasure. Next, tracing his fingers along his inner thigh and marveling at how Vash twitched in his sleep, he bought his fingers up to his cunt. Caught between alien and human, it had its own odd beauty. Knives pulled at the petals until he got a reaction of Vash's legs kicking out in his restraints. And yet, he didn't wake up.
Knives unfurled the half formed petals until his clit - still so terribly human - was revealed. Annoyed by this revelation, he pulled back.
On the tray that Conrad had left, there were a few things. Most didn't strike his fancy just yet. The one item, though, that did? Knives held up the speculum. He was more interested in the way it could penetrate Vash. Knives wanted to see how deeply his pet could take something - out of arousal or annoyed pettiness, both mixed together into one ultimate urge.
He turned back and found that the petals had stayed unfurled. Knives could see how it was still actively changing. Colors swirled beneath tender flesh. Petals, smaller and ringing the larger ones, knitted themselves into existence. Even with only a few hours in his universe, Vash's body reacted so well.
“What a good boy you are, Vashuu .” He mocked out loud to an unhearing audience. “Your brother was a fool to not indulge.”
Knives took a bit of the lube provided on the tray, coated his fingers and the speculum and leaned into his pet's cunt once more. It smelled like a sweet perfume. Knives rubbed at Vash's clit idly, like a researcher. And when that sweet scent intensified, with a little stream of nectar… slick? It was caught between both worlds. Knives still lapped at it all the same and shook with the shocks of pleasure it sent to his cock.
But he would have to wait. He wanted Vash wide awake.
Still, he pressed on. His fingers dipped into Vash's cunt, finding some resistance. Knives weighed, then, whether to continue with them, stop or simply shove the damn tool into the boy. He brought his lips to Vash's clit, indulging in his taste as he mulled over his choices.
The sweet taste cooled his nerves.
He could wait. And wouldn't it be more fun to do this later, when Vash was awake and he could hear the boy's cries? Pain and pleasure melding into one. Oh, it would be delightful.
Knives pulled away and tossed the speculum back onto the tray. Truly, he was a man of restraint.
Vash wakes up in a dark room.
He's pretty sure it's his room. But it's both too dark and he doesn't have his glasses. Whether he forgot them in the living room or Nai broke them during his… His prank , Vash isn't sure. But he sorta aches. And stuff feels fuzzy.
Vash gets up and feels a carpet beneath his bare feet. He's in the clothes he was wearing before. It really feels like he woke up after experiencing a really cruel prank. That's what he tells himself as he gropes in the darkness for his room door. He's sooo going to yell at Nai for this stupid fucking prank.
He grabs the door handle. And it's only because of his indignant rage that he doesn't notice that it's a thin handle and not a knob. That it definitely isn't his bedroom door.
“ NAIIII! You fucking - ”
It becomes a moot point when he screams into a sleek, metal hallway.
Vash blinks.
He steps into the hallway. Vash looks both ways. Then looks again. Nobody is there, though he can hear distant footsteps in one direction. With little time to think (because this is making it harder to believe it's actually a prank anymore), Vash books it the opposite direction of the incoming footsteps.
Vash doesn't know where he's running. And the windows he sees as he runs just show him an endless desert. So, you know, he doesn't have much time to ask where he is. Vash just runs until he can't hear those footsteps anymore, until his heart threatens to crawl up and out of his throat, until -
“Woah…”
Spread out in front of him, flanking a catwalk, are multiple, massive tanks. And suspended within them are - Vash isn't sure how to describe them. They're like if a plant tried to mimic feathers, but distinctly still a plant. And an alien's understanding of both.
Something compels him closer to one. And as he does, two things happen; the plant unfurls and also, he starts to glow like a popped glowstick. But there's seemingly a purpose to his glowing. Distinct lines in his skin (when did that happen?) glow and gently pulse, though he isn't sure if it's with his heartbeat or what.
He looks up at the plant/bird alien watching him, ready to ask a question, before he hears footsteps behind him.
Vash flinches and hits his head against the glass, giving whoever had arrived enough time to approach him.
“I see you've met our sisters.” It's a terribly familiar voice, but deeper . Somehow. “I'm glad, Vash.”
Then, there's hands grabbing his wrists and hoisting him into the air.
Facing the stranger. Vash is looking back at his “brother” but he can only ask one question.
"Sisters?" Vash’s eyes go between this tall clone of his brother and the strange flower-angels suspended in weird rows of tanks. "I -"
"You do now." Not-Nai steamrolls any attempt of Vash's in protestations. "So many of them. And your body is reacting to them. You aren't human anymore."
Not-Nai holds him up easily by his wrists, dangling him in the air like a stuck pig. He's wearing his sweat pants and t-shirt, yeah, but he feels naked beneath this guy's gaze. And the gaze of the ethereally beautiful aliens in those tanks. They're both consuming him with gaze alone.
"You - you've gotta be pulling a prank on me." Vash whimpers, even as he feels the lines on his body begin to pulse. There's a heat in his belly. He really doesn't like this. "You can tell me -"
"You're quite adorable, but I'm getting tired of your babbling. I think I'll suffer it more after I've gotten my cock in you." It feels like those bad pornos Vash would read online, with the lights off... under his blankets. But so terrifyingly real. "You looked beautiful under my hands earlier. But I want a real taste now."
Wait, what?
"What does that - WAIT!"
Not-Nai had decided now would be a great time to actually pull his low-riding sweats fully off. How those survived running through a weird mad scientist's lair is a mystery to Vash. But he has more pressing issues at hand. Like his pussy, now an unfurled flower -
Wait, what ? Again .
“Woah! What happened -”
But Not-Nai is already shoving his face into Vash's pussy-flower. He has Vash pressed against the glass of his Sister, using her habitat to prop Vash up. With his hands free, and a tongue lapping against his clit(? It feels good ), he just buries his fingers into the man's hair.
His tongue presses into Vash, little licks alternating with broad strokes. Although muffled, Vash thought he sounded like a starving man given food for the first time in weeks. And when he grew tired of tongue-fucking Vash, his mouth curled around Vash's clit - it was longer now, and the brief glimpses Vash was afforded made him think of a… stamen? Pistil? He decided on pistil.
Not-Nai pulled back and without a word - face dripping nectar, but looking otherwise undeterred - placed Vash roughly on the catwalk. Vash was far too dazed from far too many things at once to try to run. But Not-Nai still placed a foot harshly against his ankle. A reminder to not run. Like he needed it.
Vash was a little annoyed he hadn't gotten to cum. But he was horrified that was his sole coherent thought. What the fuck is wrong with me? Vash thought if the stranger could just come a little closer, he could bite him. That had always been his number one, go-to, technique against his older brother.
And crying crocodile tears. Vash thought that would just make things worse, though.
“What an interesting thing you are.” He looked down at Vash, flexing his foot against his ankle - and popping a blade from the toe and his heel. Oh, great . “If only every human could be so easily changed as you are.”
“Who even are you?” Vash tried to scoot back, as far as he could, but Not-Nai pressed down harder until Vash whined. “Why - you can still… say this is a prank.”
The stranger kneeled, so that his legs bracketed Vash’s legs - trapping him - and leaned over him. It was unnerving. It made his weird pussy throb with need. His weird markings pulsed. The stranger just laughed.
“Who do you think I am?” His eyes squinted at Vash, almost like a cat. “Tell me, Vash.”
“You look like my brother.”
“Oh, I do?” The stranger’s hand traces Vash’s leg, exposed. “I’m not. You can call me Knives. But I know you, and your brother, better than you might think I do.”
“Knives?” What a stupid name , he almost wants to say. Vash thinks better. “I - I’ve never seen you around.”
There’s very little intimacy the way Knives leans in further, face close to Vash’s. It’s much more akin to a predator sizing up their prey. It still sends a needy shiver down his body. Straight to his cunt, dribbling that weird nectar. It’s like his mind and his body were cleaved down the center. Knives looked annoyed, but this close? Vash could see the same, faint markings - pulsing more gently - and errant feathers, as well as a few flower petals, dotting his skin.
He’s living the plot of a science fiction movie. A really R-Rated one, though. One he wouldn’t even be allowed to watch.
“I’m not human, Vash.” Knives snapped. “Get that through your thick skull.”
Vash had a witty retort on his tongue, but Knives had had enough. He gripped Vash’s hips and rolled him over, until his face almost hit the metal catwalk. That would have hurt, and it did rattle him a little, but he managed to bring his arms beneath his head to cushion himself. On his side, he could still see Knives sneering down at him. Knives pressed against him, almost grinding him into the metal. One leg was still trapped between Knives’ and the other was hoisted over his shoulder.
“So many disappointments. Too many failures.” Knives hissed with utter disdain. “You’ll be mine.”
At some point in their chaos, Knives had freed his cock - and it was utterly incomprehensible to him. Green and blue, utterly alien in structure. But it was big and thick, and oh -
“That’s not going to fit.” Vash choked out. “We don’t have to -”
“I’ll make it fit.”
Vash hardly had any time to process that before Knives was already shoving the tip in. He expected absolute pain; searing misery; anything negative to make this experience worthy of anger. But all he felt was bliss . A strangled little moan fell from his lips as the petals of his cunt curled around Knives. Welcoming him in.
Still, he gritted his teeth. He willed his body to reject this. This had to be a bad dream. And yet, the pleasure still came over him and Knives groaned.
“Tight.” He gave out a breathy laugh. “You’re a treat, pet.”
His voice is deeper, more gravelly, than his Nai. Vash closes his eyes, and he can almost pretend that this man doesn't look like his kind older brother. He can pretend that someone did break into his house and is raping him. A stranger, a neighbor, hell, even Nico. But not Nai.
Hot breath falls on his face, "Open your eyes and look at me.... Vaashuuu ."
Vash's eyes fly open, wet with tears, and his whole body seizes up. It makes Knives atop of him groan in ecstasy. He guessed it made sense he knew that nickname if he had been following them. It still made his mind screech to a halt.
Knives is still working himself deeper. Faster. Vash curls his fingers through the grate of the catwalk, holding on for his life. Going from fooling around with crushes in school to this ; being fucked like they were both going to die if it wasn’t so fast.
And yet, Vash felt himself winding up. It was an orgasm that crept up on him slowly, but had its fangs in his belly. It was another way his body was against him. He looked down, hazy and without breath, at where they were connected. The petals of his cunt had fully furled around Knives’ cock - and Vash let out a small whimper.
But that was swallowed up by a moan that was ripped from his throat. He couldn’t think. His fingers curled tighter, until it almost hurt.
Everything went white. Vash couldn’t think as he was dragged through his orgasm, his pulsing lines so bright they were almost white. He closed his eyes so hard he saw stars.
When Knives finished inside of him, petals and feathers littering his body, he laid himself on top of Vash. Not his full weight, but enough that Vash felt both smothered and comforted. In the immediate aftermath of all of that , his brain was stuck in a mire of nothingness. His heart thundered in his chest and his body ached. He felt dirty and Vash still hoped this was a bad dream.
And yet, when Knives pulled away, Vash whined. The loss of warmth made him feel lost and he weakly reached out.
“Like a lost puppy.” Knives said, with a mocking sort of undertone to his voice. “It’s okay. We won’t be far from each other for long, not anymore.”
Knives stood and stretched, like he was showing off for Vash. Or their sisters.Vash just laid back and stared at the ceiling. Dark steel loomed above him, shadows twisting and dancing from the pulsing light of the tanks.
This was his life now.
Haunted by a doppelgänger.
Vash closed his eyes and let sleep steal him away. He just hoped that when he woke up again, it wasn’t anywhere worse than this.