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If anyone asked, Vash would say that he wasn’t entirely at fault for the destruction of the bridge in the town he was currently in. Where else was he supposed to run when the bounty hunters were actively shooting at him with both light and heavy machine guns? Those things could have killed innocent civilians! The bridge was wobbly at best anyway, structurally unsound. Vash liked to think he would be doing the town a big service by finally forcing their hands to have the poor spanning structure fixed.
“This is what I get for visiting my sisters without a proper invite, I guess…” Vash sighed as he prepared to be gunned down in the middle of the damned bridge.
And of course, as the bridge started to crumble from the barrage of bullets, one of the gunmen slipped due to a portion of the ground collapsing along with the bridge’s anchorage.
The Death Ravine definitely deserved its name as Vash quickly wrapped his legs over one of the vertical suspenders, swung his body outwards and immediately ejected his grappling wire to grab the man from the dark and seemingly endless drop.
The inertia from the man’s weight plus his downwards momentum was almost too much for Vash’s arm to take and he heard an unpleasant sound that probably spelled something back for his prosthetic. It didn’t help that he only had his legs to rely one while he pulled his wire back with the now struggling man.
“Sir, I’d really appreciate it if you didn’t move too much— What the heck, why are you still holding that?!”
No wonder his arm almost broke. The man still had his heavy firearm with him. Aaaaaaaaand he was definitely trying to right himself and aim upwards. The man was going to shoot Vash for his troubles. Figures. The man would be lucky to get a shot in before Vash dropped with him because his legs were definitely slipping.
Well. He led a happy life.
Just as his legs gave out, he felt a strong grip wrap around his right ankle, jostling his whole body precariously.
Vash looked up and his face lit up at seeing who had caught him. “Nai!”
Nai did not return Vash’s enthusiasm. In fact, he had on a completely different expression - surly and 100% pissed. “I leave you for two minutes , Vash. Two. Minutes.”
“They had donuts—”
“Shut up before I drop you.”
Shrugging as best as he could upside down, Vash nodded. “Fair enough.”
After Nai pulled him back onto the impressively still-intact bridge and Vash convinced Nai to not cut off the wire holding the gunman that was still trying to shoot them, Vash managed to assess the damage to his arm that had been caused earlier while Nai dealt with Vash’s extra weight.
In human terms, the arm was definitely mangled. And it was malfunctioning, twitching and slapping Vash in the face without premeditation.
“Brad’s gonna kill me…” he mumbled as his other functional hand nursed his own slapped cheek.
Nai had just scared the last gunman back into town by threatening the man with his knives so he was just turning back to Vash when he said, “You’ve caused more collateral damage in the past. You’ll be fine.”
When Vash silently presented his damaged prosthetic to his brother, Nai paused for all of two seconds before he conceded, “You’re right. He is going to kill you.”
“I’m going to kill you,” Brad announced before saying anything else as his eyes focused on his handiwork that was sparking ominously.
“Noooooo,” Vash whined. “It wasn’t my fault! I had to save him!”
Nai was holding his brother’s prosthetic to stop it from slapping either of them, evident by the reddened areas of their faces and skewed or missing glasses. “Fix this or have it disconnected entirely.”
Brad sighed as he approached the twins, hand already reaching into his pocket for one of his tools. “Best I can do is take it off for now. Still fixin’ the replacement.”
“No arm?” Vash pouted.
“Do you want the noodle arm prototype?” Brad asked with a single raised eyebrow. The noodle arm had been a joke but it still technically worked.
Vash made a face that very much expressed his opinion of the noodle arm. “No thanks. I’ll go arm-less.”
“I have one you can temporarily use,” Nai offered as Brad finally detached Vash’s damaged prosthetic.
“Really?! Since when? And where is it?” Vash excitedly turned to his brother. He missed the odd look on Brad’s face that zeroed in on Nai himself.
Nai smiled fondly at Vash’s eagerness. “I’ll show you.”
Brad prided himself for knowing good handiwork when he saw it. It wasn’t hard to admit that the arm Nai had designed for his brother was impeccable, something Brad believed only someone like himself and his colleagues could have crafted and perfected. The arm was just the right proportion to Vash’s body. The neural connections also lined perfectly with the mechanical stump Brad had initially designed and he could tell that a lot of love and care went into the finishing touches for the prosthetic limb.
It was as good an arm as anything Brad would have made for Vash.
“So it has your approval then?” Nai inquired of Brad as Vash gushed over his new arm before them, turning it this way and that, flexing his fingers and wiggling his arm to show the fluidity of his new limb.
Brad scoffed, not unkindly. “Wouldn’t have put it on him if it didn’t.”
Nai stood a bit taller having heard the underlying praise.
Still, there was a niggling in the back of Brad’s mind. He chose not to look too deep into it since everything worked out well. The arm would work as a temporary replacement until he finished tuning the two prosthetics still with him.
Rare were the times when the twins were forced to separate but Nai had his duties as a hyperaccumulator if Luida called on him while Vash had his duties to assist their sisters if need be.
During times like these, Brad usually offered to accompany Vash in Nai’s stead. It placated Nai enough not to worry too much about his brother. Brad knew the twins still contacted each other in between the travelling period anyway. Ever since that makeshift satellite was launched by the surviving aerospace engineers from SEEDS ship seven, the twins had instantly made use of the frequencies available to stay connected. It was most likely some form of separation anxiety.
The destination Vash was expected to assist with at the time was two days away by thomas at the very least. A strenuous journey to the outskirts of December where a town’s PLANT had begun emitting a distressed sound, picked up by the monitoring device the twins had helped build two decades ago to find their sisters who were in need. After packing up the necessary travelling rations, Brad and Vash made their way there while Nai was forced to stay back to help the botanical department.
Brad and Vash safely reached December in less than 46 hours. They made a pit stop at the outpost to disarm the monitoring device before heading into town. It didn’t take long for Vash to work his magic on the town’s resident PLANT shortly after arriving. The townspeople were a friendly bunch and even offered them an overnight stay at their inn in exchange for their help. It was too great a deal to pass since their rides needed to get some proper rest too before the two-day journey back to Home.
The both of them were given separate rooms after enjoying a hearty dinner courtesy of the local diner. The day ended on a high note from the successful endeavour.
Except Vash had been having an odd feeling in his mechanical arm all day long.
He didn’t want to tell Brad for Nai’s sake but it felt… off. Sometimes it moved a different way than Vash wanted it to. There were short instances of subtle malfunctions that Brad had missed but it was glaringly obvious for Vash himself. He tried contacting Nai but his device seemed to be having connectivity issues. He really didn’t want to trouble Brad or indirectly make Nai feel bad for making a faulty arm. Nai had worked on it for years just for Vash. He could stand to wear it for a few more days.
Vash was fast asleep the moment his head hit the pillow.
…hot… It was sweltering… But not quite like being in the middle of an endless sea of sand. This was something that blazed from within. Vash felt like his face was burning, his chest heaving for breath and there was a hot clenching sensation in his lower stomach. He let out a confused whimper, overwhelmed by the unbearable heat and… and…
It was between his thighs.
Something there that made him clench, made him feel soaked through but still so hot. Like there was fire trying to crawl out of him followed by a pain so sharp that it enlightened his nerves. He wanted to protest, wanted it to stop but it kept on pushing, kept on sinking — He was writhing. His head was tossed back, feet dragging against the soft yet scratchy surface beneath him, his throat vibrating from breathy groans.
Too much… Too much!… It began moving inside him, that unbearable heat only climbing higher and higher as it twisted against his walls, sliding in deeper and out again, scraping over his sensitive clit in a way that felt strangely sensual — His body tensed up, feeling the heat abruptly turn into white hot pleasure, pulling him towards the edge, building him up to an orgasm he didn’t even know he was about to have.
But he couldn’t help but chase after it, clenching around the intrusion, feeling it press deliciously inside him, feeling himself growing slicker. His hand clutched and released the sheets under him at the rhythm of the heat fucking into him. As Vash neared his peak, his consciousness wavered. The sparks of pleasure that were penetrating him and licking every inch of his walls became too much for his mind to bear. His eyes fluttered and fought for consciousness.
Vash woke up with a confused sound on the tip of his tongue that dialled up into a hearty moan as his orgasm hit him, back arched off the bed, feet and toes digging desperately into the sheets, surreal pleasure kicking in as he cried out again from how intense it was. He could acutely feel himself orgasming, the twitching and shaking of his sex almost too unbearable.
Panting out little moans, Vash became aware of the wetness lusciously trickling from his groin, the layer of sweat covering his body, the drool dripping down his slack jaw and mostly, the relentless fingers that was still fucking him through his orgasm. His vision came into focus and Vash realised what was between his spread out legs. He should have felt it but at that moment, he couldn’t feel it, couldn’t control it. His prosthetic arm wasn’t his arm —
Vash yelped when the mechanical fingers began violently abusing his cunt again, in and out it went, three fingers at least, its pace almost too fast - inhuman . Vash tried to grip the prosthetic but he was too weak to pull it off of himself after coming so suddenly and being actively forced into another oncoming orgasm. He choked on a cry as the seams of the ball joint between the hand and the arm kept catching and rubbing onto his swollen clit. Vash sobbed from the horribly wonderful sensation, wondering how long this had been going when he felt his body rub against the damp spot beneath him.
He was so wet . The sounds his throbbing cunt made as those fingers kept playing with him, plunging into him without care, it made his walls and folds quiver with need, his arousal so thick, Vash felt like he was drowning in it. His thoughts were muddled from his impending orgasm, knees shaking like a leaf, toes curling, hips rocking and thrusting into the exquisite torment. His other hand had long given up from stopping the inevitable. But just as he was about to reach yet another mind-shattering release, the mechanical fingers stilled inside him.
It was both a reprieve yet a torturous ordeal as Vash was finally able to catch his breath. He tried to regain control of the prosthetic but then those fingers started up again, making Vash jerk and twist with pained pleasure once more. Again, Vash was pleasured till he was dripping slick, his insides so slippery, he felt like he could take the whole mechanical fist inside. The metallic fingers were cool, a soothing balm against his burning walls but they were cruel. Again, Vash was denied another orgasm. And then again, he was forced to endure the sweet buildup to an orgasm that never came.
After the third time, he wondered why he never associated that unerring accuracy of the fingers teasing him so deliciously with the creator of his temporary prosthetic. This had been one of their games after all, one of Vash’s favourites. Vash would wake up, already tied to the bed and then have his genitals played with till he was a trembling, sobbing mess. Much like how he was at that moment on that single bed in the inn. He had been so preoccupied with his own desires that he failed to detect that familiar presence in his mind, watching through his eyes, knowing exactly when to stop and deny him.
And Vash knew how to end this game of theirs. Nai only ever wanted to hear one word from him, said in equal parts of utmost desperation, despair and coerced pleasure.
He could feel Nai inside his head, pressuring him, mocking him.
It was the fact that Nai wasn’t even with him, was nowhere near December yet still Nai completely owned Vash, his mind and body, his pleasure and suffering, all of it made Vash work his heavy tongue, push himself against his own fingers that were never his to fully utilise in the first place and finally Vash begged to his brother like a damned sinner on his knees pleading for mercy.
“…Please, Nai— I want to— Let me…” Vash sobbed, feeling his swollen and sore clit pulse alongside his beating heart, hot tears spilling from his eyes from the need to ejaculate. His voice felt as wrecked as his tender folds. “ Please , let me come…!”
And when those mechanical fingers started moving again, Vash felt every ridge of the digits, every groove, every seam that caught against his walls, rubbed and pushed heavenly against his helpless clit, making him drip his need uncontrollably over the sheets. The squelching of his soaked cunt was almost louder than the sound of Vash’s unabashed moans and wails bouncing off the walls of the room. He couldn’t care less about the lewd noises he had no control over. All that mattered was that Vash was being brought closer and closer to that edge.
Nai knew he was close. Nai always knew.
Those fingers moved faster. Deeper. Harder. Carving so much into him that Vash clenched his legs, pleading for Nai again. For his brother to stop. Or to keep going. Vash didn’t know anymore. The tighter he clung onto the fingers, the harder they stroked, and Vash loved the mindless force of it, craving how detached the fingers were from how much Vash was suffering so sweetly.
It felt so good.
Everything came crashing down when his whole mechanical arm started vibrating, shaking Vash at his very core, the devastating reverberations zeroing in on his exposed clit. Vash barely heard himself scream as his orgasm was ripped out of him.
After getting back from December, Brad took less than a week to fix both of Vash’s prosthetic arms that were still under his care. He found Vash reading with Nai and delivered to him the good news.
“You can take that one off now,” Brad offered.
But Vash looked at him with a sheepish smile and said, “That’s okay! I think I’ll use Nai’s arm for now. No need to replace something that’s not broken.”
And it was the specific wording Vash chose that triggered Brad’s memory from a few decades ago - when he first caught Nai researching his own arm in hopes of making a new one for his recently traumatised brother who had just had his arm cut off for his own safety.
Brad had scoffed at the kid then. “You know your arm isn’t his arm, right?”
Nai had turned to him with an odd look in his eyes, his voice subdued and… calculating. “No. It’s not, isn’t it?”
Brad had thought nothing of it then. Told the older twin not to worry his pretty little head about it and that he would personally make Vash a replacement limb. Instead of being pushy and demanding as Brad expected the other to be, the teen had relented and Nai had even asked if he could watch the process.
From the way Brad had heard Vash scream himself hoarse that night at the inn through the thin walls between their rooms and the knowing look the twins were sharing right in front of him, Brad knew exactly what Nai had made when he said he had a spare arm for his brother to use. Decades worth of research went into that single masterpiece for both altruistic and nefarious purposes. It couldn’t have been any more obvious from how Vash had specifically called it 'Nai’s arm' earlier.
And now that Vash had a taste for it, Brad doubted any of his creations would ever be used again.