Archive of Our Own

Last thing Vash saw was a flash of light, his brother’s shocked, terrified expression as he flew toward him, then nothing.

He groaned, rolling onto his good side and—wait. Good side. He stopped and patted over his abs with his…intact hand. He yelled, then yelled again when his voice came out all deep and wrong. Was he sick? Was this some sort of weird plant puberty and his voice dropped, again?? He tried to reach to his other side, but his suddenly very substantial chest got in the way.

“Why do I have boobs…”

“Those are not boobs.”

“Ah! What the hell?!”

“Calm down,” he said. His body, that is, sitting across from him in the desert sand. It was a perfect clone, down to his mole on his cheek, his piercing, his dark bags, the way he slouched from chronic pain…

“Um, why are there two of me…?”

“Two of…? Brother, I know you’ve spent many years among humans but surely their lack of intellect hasn’t rubbed off on you.”

“Brother?” He squeaked. The copy-him looked down pointedly, and Vash looked down as well. It wasn’t from an angle he was used to, but this was his brother’s body. Nai’s body.

“What…uh, what happened?”

“You think I know?” He, Nai, scoffed. “The last thing I remember is surely the last thing you remember.”

“We swapped bodies.”

“Very good,” Nai cooed, it was weird to see such a snide expression on his own face, he didn’t think his facial muscles were capable of pinching up like that. Nai stood, and instantly staggered to the left when his right leg didn’t cooperate.

“What? Vash?” He braced himself, feeling down his—Vash’s—leg, and froze. Vash winced, preparing for another lecture as Nai traced over his pant leg, feeling the metal prosthetic where his right leg used to be. Nai breathed carefully through his nose—it whistled a little, permanent after a bad break that set wrong—but said nothing. He straightened and stared coolly at him down his own nose.

“Get up.”

Vash scrambled to his feet, reeling when he compensated unnecessarily. His muscles performed flawlessly, and he was never more aware of how much pain he was in daily when suddenly stuck in a body that had none. No aches or pains, no hunger, no itchy patches of scar tissue warring with bits of metal that served to patchwork his body into working condition.

“Brother…”

Vash rubbed at his eyes, Nai’s eyes, before tears could fall.

“Come,” Nai murmured quietly, staring at him, “let’s find shelter before that storm arrives.”

Vash glanced behind him, able to perfectly make out the shadow of an encroaching dust storm on the horizon. They walked for a good five minutes—Nai more limping than walking, not used to the prosthetic Vash’d had years to acclimate to—before he made a frustrated little noise and stopped. Had Vash always sounded like that? Or was it just bratty Nai in a tiny, brattier body that suited him.

“Call my wing and carry me, your body is too tired to keep going.”

“I always feel like that, Nai,” Vash chuckled, startling himself with the way the laughter sounded rolling out of his chest, real laughter, not the haughty chortles of a man who thought himself a god. Nai stared at him, too, before he shook his head.

“No, no, I refuse to believe you always feel like this, I can barely move one foot in front of the other. Call my gate this instant so we can find shelter!”

“I don’t know how!” Vash snapped back, scowling. There, that was an expression this body was familiar with.

“Useless,” Nai hissed, resigning himself to continue trudging through the sand. Vash sighed and trotted to catch up, marveling at how readily this body obeyed and moved, fluid like oil in water. His own body was more like an ancient piece of rusty machinery with a couple screws loose (actually not too far from the truth, his leg was definitely in need of a tuneup).

“Could you at least try to call my cloak? For shade?”

Vash frowned, concentrating. There was…something, at the edge of his mind, a little tickle, and he imagined he could pull on the thread and then, perhaps—

“No! No! Not that!” Nai shouted, dancing away as best he could when large, jerking tentacles of blades shimmered into existence and flailed through the air and sand.

“How do I turn it off?!” Vash shrieked, staring at the wildly flailing things.

“Let your mind go blank, that should be easy for you!” Nai shouted, narrowly avoiding a whizzing slice over his head. Vash crammed his eyes shut, thinking about literally nothingness, and it seemed to do the trick. The weight of the blade tentacles vanished and he heard his voice—Nai’s inflection—gasp out in relief.

“Let’s just walk,” Vash forced out, catching his breath.

“Fine.”

By the time they found a burnt-out shell of something that might’ve been a homestead once upon a time, the storm was upon them. Nai panted, trying to stay upright in the howling wind and Vash stepped forward without a thought, steadying him with one of his much larger hands on his much smaller waist—was he always this small??—and didn’t wait for Nai’s inevitable squawk of indignation, dragging him inside. Deciding to put his newfound strength to good use he set about blocking off the door and any openings with furniture, slabs of sheet metal, tarps, until at last they had a sanctuary from the sun and the storm.

“I could get used to this,” Vash quipped, flexing his arm, trying not to stare too appreciatively at his brother’s muscles.  Even after all that activity, he couldn’t feel a thing, not a single strain or bead of sweat on his brow despite the heat. Nai looked at him. He’d taken off Vash’s sunglasses to see better indoors, and his eyes glowed in the gloom. Vash knew they did—hence the glasses—but it was unnerving seeing it from an outside perspective.

“You could get used to it, you know,” Nai spoke. His voice was small, Vash had to strain to hear him over the howling din outside. “It doesn’t have to be this way,” he held up Vash’s prosthetic arm, awkwardly using it to tap his metal leg with a hollow clang.

“Don’t start, Nai, please,” Vash sighed.

Nai held up his hands, scowling, but fell silent. Except when his stomach gurgled.

“What in the world was that?” Nai bemoaned loudly. “Are you ill? Is that why your body feels this way? Vash, you’d tell me if you were sick, wouldn’t you?”

“I’m not sick,” he laughed, standing easily to approach his—now much smaller—brother. He fished around in his pockets—deciding to ignore his brother’s warmth under the coat, in his body—fingers expertly rifling through crumpled old bills and coins, lint, a stray shell casing he saved for whatever reason, a condom wrapper, until triumphantly snatching out a square of toma meat.

“…You can’t be serious.”

“Oh, deadly,” Vash warned, pitching his voice low in the way his brother used it on him. “If you don’t get something to eat soon you might pass out. Though, this stuff is a little hard to eat if you can’t cut off little chunks of it. I don’t have a knife and I think trying to manifest your weird blade things again would be a bad idea, so…start gnawing.”

Vash shoved the bit of meat into his brother’s hands. Nai darted his eyes down at it, shifting with a little whine when his stomach growled again.

“Is that seriously all you have…?”

“No, I’m just playing with you,” Vash grinned, pulling a protein bar out of his other pocket, exactly where he’d stashed it for later not even a day ago. Nai snatched it with a scowl, fiddling with the wrapper for an embarrassingly long time—he couldn’t manipulate the fine-tuning of Vash’s prosthetic fingers as well as Vash could—until finally he got it open. He started with little bites, but before long he’d eaten the whole thing, staring glumly down at the empty wrapper.

“You don’t have any more of those, do you?”

“Sorry, no,” Vash shook his head with a wry smile. Nai gave him one of his looks.

“Vash, that can’t possibly be all you had to eat out here—”

“I make do, Nai,” he cut him off. “The people I find out here, they need their food and supplies a lot more than I do, I couldn’t ask them to spare much just for me.”

“Yes you can,” Nai stressed, exasperated. “If you insist on following this saintly route, at least learn your own self worth! You won’t be much good to the humans if you’re dead!”

Vash flinched. He knew his brother cared about him, whether that love was warped or not wasn’t the question. But to hear him say it, to give him certain allowances, to acknowledge his journey like this, it was…different.

“Why the sudden change of heart?”

“Don’t get me wrong,” Nai’s scowl looked more like a pout on Vash’s face, “I don’t agree with you, and I do not condone your actions. But I would see you alive, brother, no matter the cost. So please. Take care of yourself.”

It was Vash’s turn to shift into moody silence. The storm raged on.

“I believe I have to urinate.”

“Go ahead,” Vash grumbled, not looking his way. More silence.

“Vash, I believe I have to urinate.”

“So?”

“So,” Nai fumed, making his shaky, staggery way to his side, “if you recall, I’ve never done it before with this body. I don’t…” he made a frustrated noise, wringing his hands, “do I…squat…? Stand…?”

“You’re kidding,” Vash breathed, cheeks heating up.

“Do I strike you as the type to ‘kid’ about something like this?” Nai hissed, cheeks as red as Vash’s coat.

“Ummm,” Vash glanced about, taking in their shelter for the first real time. It wasn’t much, a large room that might’ve once been partitioned into a cozy, single family home, but thankfully a toilet still lay nestled in the opposite corner. The plumbing definitely didn’t work anymore, but hopefully it was still connected to a septic tank.

“Over there,” he nodded, and Nai turned to look, squinting in the dusty dark. “There’s a toilet. Go over there, take my-your pants off, sit down, and do your business.”

“And it’ll just…” Nai mumbled, making a motion with his hands.

“It’ll just what?”

“Come out?” Nai squeaked.

“Do I need to hold your hand?!” Vash teased, incredulous. “You’ve pissed before, I know you have, get over there!”

“I haven’t physically expelled waste in over a hundred and fifty years! Forgive me if I don’t know what I’m doing!”

“Stop talking about it like that and just go!” Vash’s ears were ringing he was blushing so hard.

“Fine!”

He rotated towards the door, hunching with his arms crossed and focusing as hard as he could on the sounds of the storm outside. It was impossible. Every little noise Nai made was like a gunshot. He listened to an unusual amount of rustling, some confused little noises, a quick, panicked breath, and then finally a quiet trickle as his brother discovered how to piss out of something that wasn’t a cock for the first time. It would have been hilarious if the situation wasn’t so surreal, if it wasn’t his body back there that Nai was pissing out of.

Actually, he frowned, taking a quick peek between his legs, what equipment was Nai working with, exactly? He couldn’t tell much, there was a bulge but it was shielded by a cup of suited armor, there was no give to it under his fingers as he poked and prodded.

“Did you wipe?” Vash asked, being more cheeky than genuinely curious, when Nai returned to their seats by the door. “And why’d you take my coat off?”

“I didn’t want it to get dirty. Did I what?”

“Wipe.”

“The toilet?” Nai wrinkled his nose when Vash stared at him, flabbergasted. “It was so dirty, a single wipe wouldn’t have done anything, no, I squatted, if you must know. It was a little difficult but I managed.”

He even sounded a little…haughty. About squatting and not wiping a damn dirty toilet.

“Nai,” Vash murmured, pinching his nose. “With bits like mine, you gotta wipe yourself clean. You probably got piss in my underwear now, that’s just great.”

“No, the piss is in the toilet, you can go look.”

“Are you being this obtuse on purpose or what?” Vash snapped.

The blush on Nai’s cheeks traveled straight up to his ears and down his neck.

“I think I have to piss again,” he rushed out, making for the corner.

“That’s dumb, get over here,” Vash hissed, grabbing his arm. He was starting to see how easily his brother handled him in the past, his bicep felt incredibly delicate under his hand, breakable like a bird’s wing.

“L-let go,” Nai yelped, doing his best to struggle but it was laughably easy to hold him still. It was a heady, giddy feeling. Addictive. He squeezed and Nai cried out, going limp from shock.

“Oh come on,” Vash smirked, squeezing tighter for good measure, watching the way his brother keened and writhed in his slighter body, “this is nothing.”

“Vash, please, let me go,” Nai pleaded.

“What’s gotten into you?” Vash breathed, pulling him closer. “Could it be you’re getting a little too into it? Being inside my body?”

Nai whimpered. He never knew he could make a sound like that. He throbbed. Oh. Oh…my.

“I have to pee,” Nai insisted, squeezing his eyes shut.

“No you don’t,” Vash chuckled, dropping his arm in favor of gripping his hips—tiny, breakable—pulling him between the vee of his spread thighs. Nai stayed, stuck still, shaking, when Vash gripped his waistband, tugging his pants down.

“Vash,” Nai squirmed, doing his token best at batting his hands away, trying to stop his underwear from being dragged down with the pants.

“It’s fine,” Vash chuckled, “I see this thing every…day…”

It was completely different, Vash decided, staring at your own pussy. Staring at your own very wet pussy.

“Nai,” Vash breathed. His brother moaned quietly, trying to pull the hem of his shirt down to cover himself but Vash grabbed his wrist, holding him still, pulling him closer.

“What’s this?” Vash crooned cheekily, running a finger through the slick on his underwear, bringing it up for Nai to see.

“I…I…”

“Do you even know what this is? What you’re feeling?” Vash asked, breathless, excitement pumping through his borrowed veins with incredible speed and heat. Arousal felt different in this body, sharper, centering on one point between his legs. Nai swayed with a helpless whimper, his one flesh hand white knuckled on his shirt hem.

“Can this come off?” Vash asked, grabbing that flesh hand and smoothing it over the suit covering his, Nai’s, body.

“Yes,” Nai whimpered, “take it off…”

“That’s what I’m asking,” Vash chuckled. Nai had to steady himself, panting.

“Just, mmn…imagine me-you! Imagine yourself n-naked. It comes off.”

Vash did, grinning as the suit peeled away before his eyes, revealing miles of pale, pristine skin and impeccable musculature. His abs tightened when Nai placed a shaky hand on his abdomen, just…holding it there, staring. Vash left him alone with his existential crisis for the moment, intent on peeking between his legs.

Nai had a cock. It lay limp between his legs, the entire groin and scrotum hairless and pink, not even a light dusting of blond hair at the base, like Vash had on his pubic mound that was still distractingly close to his face. God, he could smell himself. It twitched, his borrowed dick, and Vash jumped, in turn making Nai jump.

He touched it curiously. He’d held dicks before, had them in his mouth, in his ass and pussy, but he’d never…he’d always wanted…

“Ohhhhnnfuck…”

“Nai,” Vash smirked, mock scandalized as he peeked up at his blushing face, “is that the first time you’ve cursed?”

Nai looked like a mess. Vash never thought he’d see, firsthand, what he looked like turned on, what so many guys and gals had seen when they got him beneath them, sweaty and wanting. He’d always rebelled at being labeled a twink, his broad shoulders were enough to compensate for that, and they hitched with each of Nai’s panted breaths. But he was laughably small beside Nai’s bulk. His blue eyes were hazy, glowing, staring down at his…

“Are you getting off on looking at your own dick?”

“Shut up,” Nai whispered furiously, fingers from his flesh hand clenching at his side, abortively moving to his stomach but dropping again.

“You areeee,” Vash cooed, leaning back in his seat to give Nai a better view. He flexed his new pecs, his impressive, flat stomach and chiseled abs, and Nai stared hungrily at every inch of himself. Vash had muscles, sure, but nothing to this level. No matter what Nai said, these were boobs, and he was gonna treat them like it. Without hesitation he gripped the mounds of plush muscle and squeezed them together, digging his fingers in. Nai whimpered, unable to stop himself as his hand went straight to his crotch, freezing when his fingers went into a distinct position, like he wanted to grip his cock, but forgot he didn’t have one anymore.

“Do I need to teach you how to touch pussy?” Vash rumbled, delighting in how low his voice could go.

“T…teach?” Nai stammered, licking his lips.

“You wanna jerk off so bad, baby, but you gotta work for it, now,” Vash nodded down at his dripping cunt. “Do you feel all empty inside? Nice and wet and warm? Like a little ball of molten lava’s dropping down your stomach…” he sighed, languidly dragging a hand down his own twitching abdomen, toward the base of his filling cock, “settling behind your clit, making your cunt throb like…like you need to touch so badly. Are you twitching yet? Lemme see.”

Vash batted his hand away and Nai dutifully kept it clenched at his side when Vash breathed over his mound, staring in wonder when his clit filled and jerked to life. He could see when Nai clenched, the way the whole lot of it drew up a little, then relaxed. He didn’t touch his clit or pussy, yet, he only set his wide hands—fingers long and thick, pianist’s fingers—on his smaller hips, thumbs digging into bone, and Nai mewled.

“You’re too easy, you know that?” Vash chuckled breathily, rubbing his thumbs in little circles, “it takes a lot these days to get me this wet but,” he whistled low, “you’re leaking like a faucet and I haven’t even touched you yet.”

“Brother,” Nai whined quietly, swaying forward.

“Nuh-uh,” Vash leaned away, dropping his hands. “Tell me what you want. Tell me what’s going on in that brilliant head of yours. Maybe then I’ll tell you what to do.”

“I want you to fuck me with my body. I want to feel myself.”

His frankness punched a laugh out of Vash, and he couldn’t stop, not even when Nai started shifting and whining, slapping his shoulders in embarrassment.

“You little narcissist,” he giggled, wiping the corners of his eyes.

“Can you blame me?” Nai grumbled, gaining some bravery, “look at me.”

“Oh, I know, brother,” Vash replied, squeezing his pecs again, “believe me, I do.”

“And aren’t you a little curious yourself? What it would feel like…to…”

“To…?” Vash couldn’t get enough of teasing his brother. It felt like the old times, before their lives became falling ships and fire and blood.

“To feel your p-pussy, from the other side?”

Vash couldn’t stop his cock from twitching violently. Nai saw, but didn’t tease like Vash would’ve. He was the picture of desperation, if he knew what he was doing Vash wouldn’t put it past him to hump his thigh like a dog in heat.

“I am curious,” Vash answered lowly, licking his lips. Nai’s gaze darted down to his mouth. In a stupidly easy motion Vash stood and drew his own face up for a kiss. His own body was tall, he was used to towering over the ladies he flirted with on his travels, men were almost always at his height, maybe a few had a couple inches on him, but Nai was massive. They were supposed to be twins, this wasn’t fair.

Where before his mouth tasted like nothing at all, pure flavor exploded over his tongue. The sweetness from the protein bar—artificial chocolate and peanut butter, delicious—warred with the leftover dregs of coffee he’d drank that morning the next town over. Nai whimpered, and open-mouthed it sounded so whorish and lewd Vash was hopeless but to whimper in return, coaxing his lips wider, showing him what to do with his tongue. It wasn’t the best kiss he ever had, but it was the wettest and the most earnest.

They pulled away from each other with a wet suck, and Vash realized he had his brother’s head—his own—in a death grip, large hands framing his chin and the base of his skull to keep him still. Nai couldn’t move, he was pinned and helpless. Had Vash always been so helpless…?

“You’ve always held back, with me,” Vash realized, tightening his grip and Nai must’ve whimpered from true pain instead of pleasure, then.

“How could I not?” Nai forced out between clenched teeth, love so bare and obvious on features not his own, a face he wasn’t used to keeping shuttered and cold, “look at this body. You’re falling apart.”

Vash kissed him again to keep him silent, plundering so deep it was like he was trying to crawl back into his own body. Nai took it all, back bent at a ridiculous angle to compensate for the way Vash was hunched over him. He knew he must be in pain, he was always in pain. He pulled away with a gasp, his cock filling with blood and bobbing between his legs. Nai stayed hunched, small, shivering, staring up at him with those ridiculously blue eyes.

“Are you…” Vash had to clear his throat, “do you hurt anywhere?”

“More so than usual?”

“You know what I mean,” Vash rolled his eyes, “sometimes the rods in my back can pinch a little when I bend like that, so—”

“You don’t care enough to fix it yourself,” Nai breathed, incredulous, “but once someone else is inhabiting your body suddenly you…you care enough, then?”

“You’re not used to it, I don’t want you to really get hurt.” Vash frowned.

“You shouldn’t be used to this,” Nai sighed, giving up fighting. “But no, I feel…there’s no pinching.”

They stalled a little, at that. Vash rubbed the back of his neck, still hard as a rock. He understood where his brother was coming from, he got it, ok? But fixing what was “wrong” with his body had other consequences he couldn’t bring himself to allow. It meant going back to his brother, it meant admitting he was right and the humans were all terrible monsters that only wanted to hurt him and their sisters. It meant joining his brother in killing them all. But he couldn’t do that. Because for every broken inch of his body there was another, brighter memory of the goodness of mankind, of the kindness of strangers. He couldn’t overlook that. Not for the world, his brother.

“Forget it,” Nai shook his head. “We can argue about this later.”

“Right,” Vash murmured, surprised his brother was the one taking the higher ground, for once. Maybe making him horny was the way to stop his genocidal war against the humans. The thought would’ve made him giggle, but all the air punched out of his lungs when Nai gripped his cock. Even though they weren’t his own, Nai’s fingers played along his length with expertise. He knew how to touch himself, at least. Vash sagged in relief, he honestly didn’t know what he would’ve done if Nai admitted he’d never jerked off before.

“How does this feel?”

“It’s strange,” Vash answered candidly, staring down at his own hand jerking off his brother’s cock. “I’m no stranger to pleasure but it’s, um,” he paused when Nai twisted his wrist near the tip, then firmly stroked down to the base, strings of pre making the glide easy, “it’s different.”

“Can you show me, now, how your body is different?” Nai asked. He seemed like he’d gotten a hold of himself, during their conversation. His voice still wavered, but his typical confidence had returned now that they were both on the same page. Vash cleared his throat, looking around the room.

“Yeah, yeah, lemme just…”

Vash cleared a spot on the floor. There was a bed of sand a foot or so deep that would suit them nicely, and he grabbed his coat, too, to lay it out for a makeshift blanket.

“Lie down,” he told him, “careful of my leg, it’s easier for that thing to fold than you think, yeah, that’s it.”

Nai was spread out beneath him like a feast. He had to remind himself that, while the body he was inhabiting certainly wasn’t, Nai was a virgin in all the ways that counted. His borrowed face was pinched in uncertainty, flushing to the same shade of red as before as Vash helped remove his pants and boots completely. He was clearly trying to hold onto his confidence, but spread out on the ground, nude from the waist down on top of a ratty old coat in a ratty old shack in the middle of nowhere with his brother, in his body, kneeling between his legs…it probably would’ve been too much for Vash, too.

“Tell me if anything starts to hurt too bad,” Vash told him. Nai rolled his eyes, probably about to start another tirade, but instead he gasped and locked up, his thighs bracketing Vash’s head as he went down on…himself. He’d tasted himself a couple times before, when guys wanted to come down his throat after fucking his pussy, but straight from the source, fresh and hot, was so different. He felt like a broken record at this point. Different, different, it was all different.

He was sweet on his tongue, he knew he would be, but it was concentrated without the cloying musk of man. He moaned, burying his face deeper into his little cunt, nose nudging up against his nub and Nai keened, metal leg knocking into him with force. Vash surfaced for air and laughed, twisting and popping his leg off before Nai could protest, the movement long practiced and easy, if you knew what you were doing. It fell to the floor with a loud clang, and then Vash did what so many others had done before to him, he used the lack of appendage to push his thighs wide.

“Ah! Vash, oh, that’s…!”

“Good?” Vash chuckled, breathless at how his brother’s hand could almost fully fit around his kneecap. “Spreads me open all nicely.”

“Y-ye…y…” Nai couldn’t even speak when Vash returned between his legs. This he knew how to handle. He knew what his body liked best, he knew how to shove himself right to the edge and off. With a hard suck on his clit Nai quaked through his first orgasm, the noises he made were insane, delightful. Pleasure like this was so new to him, it was cute.

“Now me, now me!” Vash gushed, yanking Nai upright before he could even catch his breath.

“Wa…wait a minute…Vash…!”

Nai cut off with a squeak when his cock pushed into his face. He stared at it.

“Well?” Vash chuckled. “Don’t you wanna know what you taste like? What you feel like in my mouth?”

“In…your…”

“Yeah,” Vash goaded, tapping the leaking head against his lips, “I bet you’d open me up so well, deeper than any other guy I’ve ever had, that’s for sure. I wonder if my little throat’d be able to handle it. I sure know you can’t, but I’d probably be able to do it—”

Nai put his mouth on him, and he had to shut up, to listen. Nai made little noises of appreciation, of concentration, when he sucked and licked, mouthing at the tip, making his lips a soft cushion to spread his pre around like it was fucking lip balm!

“You’ve thought about this a lot.” Vash surmised, running a hand through his hair for some kind of tactile distraction. Nai, for his part, didn’t even try to hide it.

“Yes,” he replied easily, muffled around the head of his cock against his lips. “For a long,” he trailed his tongue around the glans, “long,” he sucked hard at the tip, “long,” he pressed kisses along the velvety length, letting his fingers tap at the tip to gather the pre in pearlescent strands, “time.”

“Fuck…” Vash breathed, letting his brother work, letting him worship his own cock in the way that…in the way that he wanted Vash to worship his cock. When he opened his mouth wide and let spit gather on his tongue to glide like a dream, halfway down, pulling back, like he wanted Vash to. When he pressed his lips in a tight seal and sucked, like he wanted Vash to. The wet sounds were obscene. His face, with his lips wrapped tight around his cock, his eyes watering as he peered up at him through clumping eyelashes, was obscene.

“How’s your refractory period?” Vash asked on a gasp, unable to avoid holding his head still, starting to feed his cock down his own throat…fuck.

“Nonexistent,” Nai promised, his voice nearly gone already even though Vash hadn’t even touched his throat. He barked out a laugh, choking off on a moan when Nai tried to suck him deeper. He hit the hard stop of his throat and Nai whined, trying to go deeper, straining.

“Stop, stop,” Vash gasped, holding him back with one hand in his hair, the other on his cheek. “You’ll only hurt yourself, you don’t know what you’re doing, lemme…”

Nai hung there, panting open mouthed, staring with fire in his eyes as Vash pumped a fist over his cock, resting the head on his lower lip.

“Swallow it,” Vash grunted, feeling himself getting close, “you—ha!—you need the protein!”

He laughed when he came, painting his lips, tongue and face with fat ropes of pearly white cum. Nai had to keep one eye shut, one of the farthest spurts reaching up to his forehead, almost to his hairline.

“Pent up, much?” Vash panted, giving himself a couple additional, slow strokes, coaxing more cum out onto his lips as Nai shut his mouth, swallowing with a heavy click. He helped lick all the cum off his burning face—“Vash, oh fuck, Vash, that’s…!”—savoring the flavor. It didn’t taste like anything he’d ever tasted before. It was like his own slick, but more tart, like sour apples. It wasn’t unpleasant. He wanted more of it. He kissed Nai, digging his tongue deep to dig out any remaining drops of cum into his own mouth, practically tongue fucking himself to chase the taste of his brother’s jizz.

They toppled backward onto the floor, back onto Vash’s coat, and he easily settled between Nai’s spread legs. His still-hard cock aligned perfectly with his leaking cunt and Nai moaned, rocking his hips, begging but he didn’t know what for.

“’M gonna fuck you,” Vash decided, “gonna fuck me.”

“Fuck me,” Nai agreed, aggressively nodding, wrapping his leg around Vash’s waist. Vash thought about patting around to find that condom he had in his pocket. Then again, he had no idea how old it was, if he’d picked it up this year or a decade ago. He let it be. He wanted to feel himself.

“I’m, unf…I’m fucking impatient right now,” Vash warned, digging the head of his cock between his folds, shivering in delight at the way his brother was practically sucking him inside already. “I can go slow if you want, open you up properly but I gotta tell you, there’s something about being split open on a cock with no prep.”

“Wha…!” Nai gasped, “n-n-n—”

“No prep,” Vash spoke in his ear, his lips popping on the p’s. “Guys love to just shove right into me. No foreplay, no nothing. Sometimes they don’t even check if I’m wet. It burns soooo good. You wanna try it, brother?”

He might have broken him, Vash thought, the way Nai was stammering and shivering beneath him, the way his cunt was clenching rhythmically against the head of his cock that kept bullying deeper and deeper by the second. Maybe he just came.

“B-but I’m so big,” Nai whispered.

“That you are,” Vash crooned, giving himself another stroke. If—when—they returned to their proper bodies he’d miss this cock. “Such a big boy for me. You gonna fuck me good?”

“Yeah,” Nai promised, squeezing his eyes shut with his brows furrowed in concentration. “Yeah, I’m gonna, I promise.”

“You’re the biggest I’ve had,” Vash continued to murmur in his ear, licking the shell like he knew made him shiver. Sure enough, Nai writhed beneath him, his shoulders bunching and he hissed, dropping his hips lower. “I wonder if my little pussy can handle it.”

“It’ll take it,” Nai promised immediately, his thighs tightening around Vash’s waist. “I was made for you, you were made for me. We’re compatible.”

“Fuck,” Vash grunted, “I am super wet right now.”

“You are,” Nai assured.

“I bet I’d…I bet you’d slide right in. You’d get me so deep, Nai…Nai…!”

He pressed in. It was tight. It was hot. He was tight. He was hot.

“Fuck, so this is what my pussy feels like,” he moaned loudly, dropping his head between his shoulders to watch himself slide in. His soaked lips were stretched obscenely wide around Nai’s cock, and it just kept getting wider, and longer, sinking deeper inch by inch until he was fully seated, the tip kissing right up against the rigid resistance of his cervix.

“I feel so good,” Nai whimpered quietly, spaced out on cock, staring somewhere past Vash’s broad shoulder as he caught his breath. “’M so big, so deep, I could…I could be in your throat…”

“Fuck,” Vash whined, jerking his hips. “Don’t say shit like that when I’m—!”

“How does your pussy feel?” Nai asked, drunk on it.

“Feels…” he slurred, starting to thrust, shallow, small rolls of his hips that were still powerful enough to send his brother’s smaller body bunching over his coat and sand. “Feels so good. ‘M so tight. I don’t know how I’m so tight when I…How is it for you? You feel good?”

“Mhmm,” Nai hummed, “the stretch is incredible. It feels r-right.”

“It feels right,” Vash repeated, nodding. It did, it felt so right, buried deep in his own body using his brother’s cock. “Touch me,” he demanded, starting up an even pace before he lost his mind, “tease around the clit a little before going right on it, but I like it, in little circles, right on it, that’s it.”

“If I keep doing this, I-I’ll come,” Nai whined, like it was such a hardship.

“That’s sorta the point,” Vash chuckled, coming back to himself a little. He dared to pull out further on each stroke, slapping his hips against his ass with loud smacks on each return. Balls felt funny, he wasn’t sure he liked that part of it, but he could get used to having a dick, that’s for sure. Nai got the hang of having a clit pretty quickly, too, Vash stared hungrily down at how he swirled his shiny fingers around his twitching nub, backing off when it became too much, and returning again the next instant when he grew hungry for more.

“Something’s…g-gonna—!” Nai suddenly moaned, dropping his hand over his stomach instead. “I have to pee! Get out, I’m gonna—!”

Delighted, Vash thrusted even faster, relishing in his brother’s tortured groans as his cervix was pounded into oblivion as he really started to fuck him with deep, powerful strokes, slipping nearly fully out before ramming back in.  

“You’re not gonna pee,” he grunted, smiling ferally when Nai wailed, clenching up harder and harder. “Let it out, Nai, let go. Lemme see me cum on your cock.”

With a final, desperate gasp for air Nai bared down, clamping tight and squirting all over himself. The spray shot up even to his waist and the liquid pooled there, jostling when Vash didn’t slow. Fuck, he hadn’t squirted in years, thought he wasn’t even capable of doing it anymore. Well, he’d just have to make the guys he was with try harder from now on.

Nai was so loud. Unabashed in a way Vash hadn’t allowed himself to be since he was young and inexperienced. It was doing things to his brain, he was seeing stars, when Nai grunted and moaned and cried on every thrust. He was curled up in a ball, twisted on his side, taking his cock deep ‘cause he had nowhere else to go. Vash grew faint when he thought he could see the outline of Nai’s cock in his lower belly.

When he came it was loud insanity. He thought the roof had blown off and the storm was on them. Fireworks exploded in his ears, lights flashed behind his eyes, and then he had a cock rearranging his insides, battering his womb so hard he could feel it in his throat, just like Nai had said.

“Nai? Nai!” Vash wailed, trying to grasp at anything for leverage but all he had was sand and his own wet coat. Fuck he hurt! Being rudely jettisoned back into his own body he was made instantly aware of every ache and pain that plagued him daily, along with several new ones. His cunt was like a raw, throbbing open wound, the bright sharpness of pain undercut with the pleasured ecstasy of his brother shoving cum deeper into his belly, spreading that molten heat all around inside him.

“Vash?!” Nai gasped, finally coming back down to reality, but he didn’t slow just yet. He grunted in surprise, eyes wide as he stared down at Vash’s leaking cunt. His hips froze and Vash groaned in relief, practically deflating into the scattered sand.

“You’re an even bigger masochist than I thought,” Vash moaned, “I feel like I was run over by a herd of stampeding toma.”

“Let me just,” Nai murmured, carefully slipping out. Vash hummed, biting his lower lip when his pussy tried to keep him in, clenching right before the head could drop free, but he was glad to be free of it when it finally did. He was gaping, he knew he was. He couldn’t help but think it was a little unfair that he wouldn’t be able to see Nai’s perspective of that. He clenched weakly around nothing when Nai’s hands held him up, his legs flopping open so Nai could see just exactly what Vash was thinking of.

“Look what you did to me,” Vash pouted. Nai’s face darkened with pure lust. His ego wore his body better than Vash ever could.

“Look at what you did to yourself, you mean,” he corrected.

Vash dropped his head back into the sand with a huff, biting back a grin.