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Shore leave, McCoy decided, was the Best Thing Ever. The ship was nearly empty, with only a few cadets and ensigns left aboard sleeping their leave away. Medical was silent for the first time in a long time, and McCoy found himself staring at his captain. Jim wore a tiny little smirk.
"Computer. Deactivate security feed in MedBay, command override," Jim said, his eyes never leaving McCoy's.
"Affirmative," the computer chimed in response.
"You sure you wanna do this?" McCoy murmured, giving Jim one last chance. Jim met his eyes solidly.
"Safeword is 'Earth'," Jim said in a low voice, cutting off whatever else McCoy had been thinking of saying. "Now, what are you going to do about this outfit? Don't think I didn't catch you staring."
They had just come from a mission which required the use of ancient, Google Era suits and ties. McCoy had to avoid looking at Jim during the entire negotiations because his breath caught every time he saw Jim lounging in that dark suit. Showing the aliens a starry-eyed doctor would not have been encouraging.
"Stay," McCoy muttered under his breath. He moved slowly away from Jim, eyes on him to make sure he didn't move. Jim watched him intently, clear blue eyes sharp and brilliant even across the room as McCoy crouched by the physical therapy tub. He crouched, twisted the old fashioned faucet (that he had installed himself, dammit all. How else was a doctor supposed to control the flow of water on these new-fangled things?) and water splashed onto the bottom of the tub. "Come here," McCoy ordered gruffly.
Jim walked towards him, starting to shuck the suit jacket, but McCoy stopped him with a slight growl. Jim raised an eyebrow but lowered his hands and approached McCoy. "Get in and sit down," McCoy said, unbuttoning his own Google Era blouse. Jim stepped down into the tub, which was really more like a very small pool. There was more than enough room to lie at the bottom, and the depth was approximately three feet, allowing for complete submersion and various swimming exercises. "Lean against the ramp," McCoy said, removing the button-up and dropping it on the ground. He was left in a white wife-beater and dress slacks that were about to get thoroughly ruined.
He felt a jolt of desire flash through his gut at the thought.
Jim relaxed against the ramp leading into the tub, his eyes never leaving McCoy, legs sprawled across the bottom as water lapped gently around his calves, soaking into his dark clothes and making them cling. McCoy placed a tube of waterproof lube on the side of the tub and stepped down into it, straddling Jim's legs and pinning him to the bottom with his knees. Jim squirmed briefly, finding a comfortable position under McCoy, a light flush dusting his cheek. The water was cool, but gently so. Not frigid or too warm. Just cool enough to cause goosebumps to race up his skin as the water level slowly rose in the tub.
McCoy pressed his hands to either side of Jim's head and leaned in to capture his lips, drawing Jim towards him with promise of heat and taste. Jim reached up to run his hands over McCoy's ribs. McCoy pressed his hands down to his sides, wrestling them behind Jim's back. Jim protested with a small, keening whine, like a kitten mewling for attention.
"Dammit, Jim," McCoy chuckled against his lips.
"God, Bones, if you go any slower," Jim hissed, attempting to shift his hips under McCoy's weight. McCoy rocked forward, pressing him more firmly to the tub lining. Jim grunted. McCoy gripped Jim's sleeves together with one hand, and wrestled the suit jacket off with his other. He twisted the cloth around Jim's hands, a confusing, complicated knock of black cloth. The water soaking into the jacket made the bind tighter, and Jim tugged at it impatiently. "Unfair," Jim pouted with a sharp twist of his shoulders.
McCoy leaned back to survey his handiwork so far. They'd planned this forever ago, Jim going as far as offering 100 credit incentives for activities organised off ship during this leave weekend. Water gradually climbed the white button-up Jim wore, soaking through and turning the cloth into a thin, transparent skin over Jim's flesh. McCoy reached into the clear water and untucked the shirt, before pulling the belt buckle apart and carefully tugging the strip of leather free.
"Bones," Jim moaned as McCoy reached around with the belt and looped it through Jim's upper arms. He belted Jim's arms firmly behind his back and pressed him back against the ramp. Jim rolled his head, eyes already heavily lidded as the water steadily rose around them. McCoy lowered his arms and opened the fly of Jim's slacks. Jim's cock sprung free immediately, hard and ready.
"Lower," McCoy urged, shifting. Jim complied wordlessly, sliding lower into the tub. Water dragged his shirt down, pressing it to skin underneath, revealing hard nipples on Jim's panting chest. McCoy was wet up to his elbows, as he trailed his hand up Jim's cock, a bare touch that sent a shudder through Jim's entire body.
"Oh my god," Jim hissed. "Bones. Seriously. You're killing me."
"You'd know if I were killing you," McCoy said. "Don't make me get the gag too." Jim shut up immediately, clenching his jaw and settling for squirming. Bones ran his hand lazily up and down Jim's prick, holding his hips down so his captain didn't ruin the neat hold McCoy had created. "You like that?" McCoy asked quietly. Jim nodded.
McCoy reached around Jim and held his wrists to the ramp of the tub as the water crawled up past Jim's shoulders. Jim's eyes were closed, but his breath came in quicker little pants as he realised he was pinned. The brief sounds sparked fire in McCoy's gut, and his own cock strained painfully against the wet cloth of his trousers.
McCoy leaned in, distracting Jim with a fierce kiss that lasted till the water touched Jim's chin. Jim broke away, gasping, squirming harder now. "Bones," he whimpered. McCoy sank his weight onto Jim's hips, preventing him from moving. Jim stretched his shoulders as far as they would go, keeping his face above the water level. He coughed, spitting out water that got into his mouth, face strained as water swirled up around his cheeks and ears. He took a few desperate breaths before slipping under.
McCoy panted, shaking with restrained desire. The desperate gasping had unleashed a fire in his groin. He watched Jim under the water, eyes closed with effort, holding his breath. He squirmed under McCoy, rubbing unconsciously in all the right places, and McCoy made sure he didn't move, couldn't get free, felt the tantalizing panic of being unable to breathe.
Jim shook his head suddenly, and McCoy hauled him out of the water, choking and gasping. McCoy let his hand find Jim's cock again, massaging it as Jim's chest heaved for air. Jim let out an unconscious groan, sinking bonelessly against McCoy's grip as he caught his breath. "That wasn't long at all," McCoy murmured, touching his lips to Jim's ear as he trailed a string of biting kisses down Jim's still shuddering pulse point.
"I grew up in Iowa," Jim rasped. "You're lucky I can even hold my breath."
"Is that an 'Earth'?" McCoy asked, leaning back and catching Jim's pleasure-hazed eyes.
"Fuck no," Jim growled, still having the composure to look pissy, despite his hair stuck to his forehead and drops of water sliding down his face. The water was up to his shoulders again, and McCoy could see Jim tensing as it steadily climbed.
"You sure?" McCoy asked seriously. "Jim."
"I trust you, Bones," Jim said, focusing his eyes on McCoy. McCoy leaned closer and swallowed Jim's short breaths as the water around the crawled up Jim's throat and McCoy's shoulders. McCoy pressed Jim back against the ramp with his body, holding his head in place now with his kisses, fierce and bruising. Jim gasped, torn between fighting back and preparing for his next dunking as water lapped against his chin. He lost the battle to McCoy's hold, and water sloshed into his airways through McCoy's open mouthed kisses. He choked, coughing violently against McCoy's lips, and McCoy pulled him up out of the water again to patiently wait till he caught his breath.
"Bones," Jim moaned. Jim's cock was hard in McCoy's hand, and McCoy figured he should spend some time caring for it. He reached over and flicked the water off, the silence sudden and heavy in MedBay. The only sound now was Jim's shuddering gasps for air as he recovered. McCoy stood and heaved Jim to the seat in the tub, setting him down. Jim melted against the seat without resistance.
It had been a long, long while since McCoy had done this. In fact, he had only ever done it once in his life, and it had ended with a bloody nose and a solemn oath never to do it again. But this tub didn't have chlorine in it, and he had more experience with blow jobs than he had when he was seventeen. And this was Jim, who had volunteered to sub for this.
McCoy spent a few moments unbuttoning Jim's soaked blouse. He ran his hands down Jim's chest, pressing firmly to skin, making Jim buck up in the water, sending waves rippling through the tub. McCoy pressed his palms against Jim's hips firmly. "Don't move," he ordered. "Jim."
Jim nodded breathlessly. McCoy leveled his breath and submerged himself.
All sound stopped. He heard his own heartbeat pounding in his ears as he blinked his eyes open to observe Jim. His cock swayed gently in the water, held up by buoyancy and his own little shakes. McCoy held Jim firmly to the tub seat. No busted nose this time, he thought wryly as he leaned close. He opened his mouth over Jim's cock, taking the tip gently so as not to surprise Jim. Jim still jerked a bit, but McCoy held him in place, and went further down on Jim's prick.
He made two or three bobs before his lungs started protesting. He slowly surfaced, ears adjusting to the echoing pants Jim was releasing to MedBay. McCoy kept his breathing under control as he readied himself for another dunking. Jim was collapsed against the side of the tub, almost slipping sideways where he sat. McCoy took a steadying breath and slid under again.
He reached around Jim's arse, squeezing and massaging flesh as he opened his mouth over Jim again. One hand was enough to hold Jim down now, so McCoy could devote his other hand to something more interesting. The sounds coming from above the water were muffled to McCoy, but when Jim came between his lips, he just barely heard the sharp gasp.
McCoy lifted himself above the water, one hand still working on Jim's arse. He reached for the lube, shaking wet hair out of his eyes as he slicked the fingers of one hand. Jim's breathing had long ago steadied, and his face and chest were flushed with orgasm. McCoy pressed two fingers into Jim's anus, and Jim lurched with a wonderful yelp. He frowned, taking the penetration, as McCoy gently worked Jim open beneath the water.
"What are you gonna do?" Jim rasped.
"Fuck you underwater," McCoy answered, keeping his voice calm and level. He popped the fly of his own trousers with his free hand, and bit back the sigh of relief. Cool water swirled uninhibited around his cock, soothing the desperate straining for relief.
McCoy removed his fingers from Jim and wriggled his captain's trousers off with effort. Jim was not helping, and water made the cloth clingy and tough. He managed to get them off and throw them out of the pool. They landed on the deck with a soft squish. Of course Jim wasn't wearing boxers under them. McCoy grinned wryly. Kid was way too easily excitable.
"I can see through your shirt," Jim growled, eyes firmly on McCoy as he worked. McCoy nodded wordlessly and applied more lube to his fingers. He reached around and pressed a three fingers in this time, silencing Jim effectively. McCoy knelt before Jim, water lapping gently against his shoulders as he carefully worked Jim open. He should be given a medal for his patience. "Bones," Jim moaned. McCoy saw he was getting hard again.
"Jesus, Jim," McCoy laughed. "You don't like that, do you?"
"Shut up," Jim growled, flushing deeper.
"How's your breathing?" McCoy asked. Jim rolled his eyes.
"I'm fine, Bones. Turn the doctor off for a moment and get to work already," Jim snapped mulishly.
"Excuse me for not wanting to drown my captain," McCoy said with a deliberately sharp movement of his fingers. Jim shifted, trying to press back into his hand, but McCoy let his fingers slide out. Jim growled at him, but McCoy merely smirked.
McCoy stood, water sloughing off him loudly in the otherwise quiet MedBay. He slicked himself with the lube, very careful to do it in front of Jim's piercing, wanting gaze. Jim leaned forward he almost overbalanced into the deeper water, and McCoy grabbed him by the belt. "Dammit Jim." He scowled. Jim grinned sheepishly, hanging forward in the water like a captured fish in McCoy's grasp. Luckily, McCoy had experience with hogtied men in rivers. Don't ask.
McCoy lugged Jim to the center of the tub, where he let Jim's knees hit the bottom. "Up," McCoy ordered sharply. Jim scrambled to get his knees under him and kneel upright in the center of the tub. The water was up to the bottom of his ribs as he knelt, and McCoy bent down on one knee behind Jim. Jim pressed back eagerly into his cock, rubbing with barely restrained urgency. McCoy grabbed Jim's hair and forced him to bend, dunking him swiftly and drawing him back up just as quickly.
Jim sputtered, shocked, and shook water out of his eyes. McCoy drew Jim back against his chest, his bound arms pressed securely between them. "You move when I tell you to move, darlin'," McCoy whispered against his throat. He touched his lips to the the shuddering pulse hammering under Jim's skin. Jim let a full body shiver loose down his spine, and McCoy smiled.
McCoy held him close with one hand tightly across Jim's heaving chest, and with his other hand guided his cock to Jim's entrance. Jim's breath hitched as he gently pressed in, and McCoy rewarded Jim taking him completely with a few quick strokes of Jim's cock. Jim groaned, trembling in his effort not to move.
"Ready?" McCoy murmured. Jim nodded, speechless with want. McCoy grabbed one of the hand holds that extended out of the tub's side and with his other hand gripped the belt tightly in a fist. Definitely not the most ideal handle, but McCoy had subbed with worse restraints. McCoy let Jim fall forward, but then stopped him as his face grazed the water. Jim, expecting to go completely under, twisted curiously, his nose and mouth not quite out of the water but enough that he could barely breathe if he took shallow enough breaths. McCoy started slowly pumping into Jim, letting realisation dawn across the captain's features.
"Fuck," Jim spat, breath coming short and hard as McCoy continued to hold him just barely above the surface.
"I wouldn't waste my breath talking if I were you," McCoy panted. His knees would kill him the next day, but oh this was going to be worth it. Jim coughed, sputtering, twisting harder to get his head out of the water. Feeling Jim's body rock in his grasp, hearing his choking gasps for breath made McCoy harder than he thought humanly possible. Jim spat out water, slipping completely under in exhaustion. McCoy hauled him upright briefly, continuing his maddeningly slow rhythm as he felt heat gathering through his body, making him shake as he held Jim.
McCoy let his arm relax again, lowering Jim towards the water. This time, he let Jim sink. Jim jerked, not expecting it. McCoy grit his teeth, pushing Jim further under, leaning with him till Jim's face was nearly touching the bottom. Jim shook his head frantically, and McCoy quickly whipped him above the surface. Jim spat out water, coughing violently, shaking them both. McCoy waited till he stopped coughing, till that point where he was breathing raggedly though his lips, and dunked him again.
The displaced water sloshed back and closed over the back of Jim's head, and his captain bucked. McCoy gripped the medical handle tightly, forcing himself not to move and to keep a solid hold on Jim. Waves lapped against McCoy's chest, kissing his skin as silence settled over the MedBay. Without Jim's heaving breaths, McCoy's own heart pounding ferociously in his own ears, almost as if he were back under the surface.
He lifted Jim, who had gone boneless in the water. He pulled Jim back against his chest. "Good boy," McCoy murmured in Jim's ear. "Good boy. Breathe now." Jim sucked in violent gasps, no air left to even whimper in protest. Balanced now, McCoy could take his hand off the medical handlebar and rove the front of Jim's chest, down to his cock, which was hard again.
McCoy gently massaged Jim's prick, continuing to whisper hot words over Jim's skin. His palms pressed water droplets off Jim's skin as he roamed Jim's chest and arms. McCoy bit gently into Jim's shoulder, and the little noise he elicited let McCoy know Jim was ready for another go.
McCoy reclaimed the medical handle on the tub and let Jim drop forward into the water again. The splash sent waves rolling around the tub once more, and McCoy met them with his skin as he started pumping into Jim's arse once again.
Bubbbles burst to the surface as Jim's breath exploded from his chest, and his arms twisted convulsively in McCoy's grasp. McCoy waited a split second before lifting Jim out of the water to catch a breath, and then dunked him again, all the while driving his cock into Jim. Bubbles formed around him as they churned the water in the tub, little white ringlets of air pockets that burst and reformed as McCoy lifted Jim clear of the water again.
Jim coughed explosively, deep, lung-wracking coughs that worried McCoy enough to hold him up longer. He drew Jim to his chest again, stilling his hips with effort. "Jim?" McCoy murmured.
"I haven't said 'Earth'," Jim growled, voice rough and cracked from coughing. McCoy tried harder to clamp down on the doctor in him and responded by shoving Jim under again. McCoy was so close it hurt, and a few quick thrusts had him coming forcefully. Under him, Jim jerked his second orgasm.
McCoy let go of the medical handle and, Jim still under the surface, pulled out of his arse. McCoy flipped him, holding him at the bottom with his wrists touching the bottom of the tub. Jim stared up at him, so hazy he probably didn't even realise he was still under. Jim's chest started convulsing, and he squeezed his eyes shut, fighting the urge to suck in a deep breath of liquid.
McCoy drew in a lungful of air himself and slipped beneath the surface, gripping Jim's face in his hands. He covered Jim's jerking body with his own and sealed his lips solidly over Jim's mouth. He forced Jim's mouth open, and exhaled between Jim's lips. He drew back, and surfaced with a small gasp. Looking down, Jim's eyes were closed as he concentrated. McCoy kept him on the bottom with gentle hands on his shoulders. Jim let his borrowed air escape slowly, bubbles drifting to the surface gradually as his life burst and vanished into MedBay air.
McCoy inhaled slowly and slid under, meeting Jim's mouth. Jim sucked at his lips desperately, drawing the air from McCoy's lungs. McCoy pulled away, Jim's breath escaped in a flurry of bubbles, and Jim frantically shook his head. McCoy yanked Jim up, holding him as he spewed water from his mouth, chest heaving.
"All right, I gotcha," McCoy murmured, running his hands over Jim's back and shoulders. "Good boy. Calm down, breathe." McCoy lifted them both, Jim's legs wrapped around his waist, and sat down on the seat in the tub. Jim leaned forward and tucked his forehead into McCoy's shoulder as his shuddering breaths calmed. McCoy unbelted Jim's arms and then loosened the wet jack from Jim's wrists. He let the jacket drift and sink to the bottom of the small pool.
"Argh. Finally," Jim groaned, voice cracking. He reached up and gripped McCoy's face, forcing a bruising kiss to McCoy's mouth. McCoy grunted, reaching up and grabbing Jim's shoulders. Apparently Jim wasn't ready to be done yet.
He shoved Jim back, but Jim barely moved on account of his legs being wrapped around McCoy's waist. McCoy stood, trying to dislodge him, and succeeded in shoving him backwards enough he dropped underwater with a flail once more. The surprise granted McCoy enough time to twist free of Jim's legs and grasp the shirt he still wore, fisting hand in it and leveling his whole body on top of Jim's. McCoy went under, and felt Jim's chest bump against the bottom of the pool. Jim tried to press up with his hands, like a push up, but McCoy kept his legs up. Jim couldn't get enough leverage to displace McCoy.
When he stopped struggling, McCoy spun in the water and lifted Jim to the surface. "Not done yet, eh?" McCoy growled.
"You made the mistake of untying me," Jim panted once his breathing had evened.
McCoy smirked. "I'm an old man, kid. I don't know if I can get it up again that quick."
"You got it up quick enough the first time," Jim challenged.
"Watch your mouth, son," McCoy warned. If they were going to continue he may as well continue in character, though McCoy really thought he was done for the day.
"Or what?" Jim countered. Jim reached down and gripped one of McCoy's pant legs and tugged. Hard. McCoy toppled over with a grunt, and crashed through the surface of the water. He hit the bottom of the pool and realised Jim's knees were on his shoulders, forcing him down. He panicked briefly. They hadn't planned a switch, but there was always the unspoken 'if you let the sub get away then you're SOL' agreement between them. It had never happened before now.
His back flattened against the pool bottom, Jim Kirk's full weight settling on his chest, forcing what little air he had out through his teeth as he clenched his jaw against the pressure. He reached up, pushing hard on Jim's arse, trying to dislodge him. Jim must have been holding the medical rails, because he was solidly in place and not budging, watching McCoy through the surface of the water.
McCoy's lungs started burning. He had been caught by surprise, hadn't gotten a full breath. Jim's cock hung lazily in the water above him, completely unguarded and half-hard. McCoy grasped it and gave it a sharp twist. He heard Jim's howl through the water, and Jim loosened his grip slightly. McCoy arched, swatting away Jim's knee and wriggling out from under him. He launched himself to the surface at the same time as he tried to put some distance between him and Jim.
"Dammit, Jim," he growled between gasps for breath. "Are you trying to drown me?"
"Yes," Jim replied, completely honest. He was slowly cutting his way through the pool, following McCoy to the other end, where there was no ramp and no seat to use as leverage. If McCoy went under here, he'd never get back up.
His back hit the wall, and he spun, intending to get out of the water and end this game, but Jim grabbed him by the back of his pants and yanked him back into the water. Aw crap, the kid had grabbed his belt, McCoy realised, irritation sliding to the front of his mind. Jim was standing over him, forcing McCoy to his knees and lashing his arms together tightly behind his back, just as McCoy had done not half an hour before.
"Revenge is a bitch, Bonesy," Jim sang above him. McCoy could feel water dripping off Jim and splattering onto his head. McCoy shook his head and squirmed uncomfortably. Jim lifted him and dunked him, not giving him a chance to prepare. McCoy held his breath firmly between his lips until Jim pulled him upright again. The sound of water crashing into the tub destroyed the MedBay silence.
McCoy blinked water out of his eyes as Jim hauled him towards the faucet, which was now spewing water full force into the tub, making the level rise swiftly, much quicker than McCoy had turned it before. McCoy briefly hoped Jim knew what he was doing. He really didn't fancy dying right now.
He was spun around, and he briefly thought about kicking Jim in the knees to force him to drop him, but the water level was too high now to sit on the bottom. Jim grinned at him, pushing him backwards in the water. The roaring and splashing grew louder. McCoy shot a glance over his shoulder. Jim was guiding him towards the faucet.
He let loose a string of curses as Jim shoved his head under the veritable waterfall, spitting out water as it got in his mouth. He shook his head, trying to shake his hair away from his eyes. Water seemed to crawl up his nose, making him shorten his breath. He lowered his head, but found his mouth was already under water. Liquid slid down his throat and he coughed, which only made him thrash and more water found its way into his air system. He choked, sure he was going to drown. The water crawled up his chin, covering his nose and mouth and he involuntarily sucked in a huge gasp of water.
Jim yanked him up, out of the liquid as he wretched, heaving water out of his lungs as best he could. Jim's hand on his cock did nothing to distract him from the fact he could barely breathe. His arms strained against Jim's belt as Jim's mouth found his, swallowing his gasps for air, making it impossible to recover his breath. He felt lightheaded and dizzy. Jim would not release him, would not quit the hand at his prick, and would not let him pull away to breathe.
He realised they were sliding under water. McCoy had let himself lean fully against Jim, and Jim was lowering himself into the tub, the sounds of water crashing into the pool resounding in their ears as they both collapsed under the surface. The sound was swallowed by the liquid, turning into a dull roar amidst the shuddering of McCoy's heart. His air was gone, his body was heavy, and he was pushing Jim to the bottom with his weight. The heat from Jim's hand on his cock split every nerve in his body, mixing with his dizziness, making his body feel as if he were being torn apart, or that his very mind would be ripped from his body on account of sheer pleasure.
He came sharply in Jim's hand, and promptly blacked out.
"Hey. Hey Bones."
He blinked his eyes open to see Jim leaning over him, face anxious. "Too much, huh?" Jim asked. McCoy twisted, rolling his head-dammit that hurt- and figuring out where he was. Jim had them propped up on the seat of the tub. "I heard asphyxiation orgasms are the greatest," Jim said, by way of explanation. "Greatest for the person being handled, no doubt. No so great for the other person. So?"
"Was really good," McCoy rasped, throat raw. He vaguely remembered choking on water. "Don't ever do it again."
"Not a chance, Bones," Jim said. "That was your one and only. And, for your information, I only did it because we are in MedBay, and only because I can work the machines well enough to save you if you went too far. I swear I would never do it anywhere you could actually drown."
"Thanks for the concern," McCoy said. "Next time give a little warning." He shifted, and realised his hands were still bound. "Really, Jim?"
"Yes, really," Jim said. "Can't have you turning the tables on me." Jim's hand carded through his wet hair, brushing it back from his face as he gazed at McCoy. "Especially not after your little trip to heaven. You can thank me later."
McCoy, as pissed as he was that he had been switched, felt the sort of boneless afterglow that accompanied an orgasm too good to describe in plain language. His body still felt the tingling aftereffects of such an intense orgasm, and Jim dragging his damn fingers all over his skin wasn't helping. Only Jim could kill him and drag him back to life while enjoying the experience.
They floated, pressed together, till the water cooled and they were recovered enough to leave MedBay presentably.