A/N: I had a lot of fun writing this one, and I think it turned out quite well because of that. I think it's the first time I've done a proper underwater sex sort of fic, and the concept stuck so much I went and did another Submarine fic (a pretty long one too), so that's now in the fic reserve too~

Midnight Dip

''...this is everything, right? I hope so... don't wanna walk all the way back for one piece of paper...''

I-58's quiet mumble was audible to none other than herself; the Submarine walking at a meandering pace through the command building. In her hands was a neatly-folded stack of documents, mostly supply requests from her and the rest of the Submarines; things like torpedoes, oxygen tanks, extra ammo and other little titbits they needed to operate efficiently.

Naturally she took it upon herself to deliver them to the Commander. The opportunity to spend some time with him, as little as it may be, was always a plus in her eyes – the prospect of getting praised for her hard work only encouraging her to make the long trek from the dorms to the office. She had been smitten with him for months now, though had only consciously realised it a few weeks ago when Albacore teasingly pointed it out.

It wasn't hard to figure out why. Beyond being attractive and sweet, the Commander had personally helped her make friends with a myriad of people, something that previously would've been all but impossible due to her reclusive nature. He had even helped her patch things up with Indianapolis, ending the feud between them that originated from their time as ships. While they would never be best friends, they were now comfortably on speaking terms, and even Portland had warmed up to her now.

So, safe to say, she held the Commander in high regard... and close to her heart, too.

Shaking off the embarrassing thought I-58 held the documents to her chest, climbing the stairs up to the second floor where his office was located. It was still the middle of the day so a few people were around; Enterprise currently busy discussing battle plans in the war room with Washington and Saratoga, Fletcher downstairs helping file some paperwork regarding her and her sisters being deployed, so on.

And soon she neared the Commander's office. The double doors were flanked by a pair of potted plants, the tall shrubs providing some nice greenery to the otherwise plain brown hallway. One of the doors was slightly ajar, allowing the voice of both the Commander and his secretary Takao to filter out – the topic inspiring I-58's curiosity, and tempting her to slow.

''...and then Atago started speaking about taking a beach trip soon. I think she just wants an excuse to get away from work.''

''Heh, maybe. I don't see why we can't host one though.''

''Mm. I'll have to take out my old swimsuit, I believe.'' Takao responded, scribbling something down onto paper. ''What of you, Commander?''

''Ah... well, I'll probably just pick a pair of shorts.'' The Commander chuckled embarrassedly. ''I don't actually know how to swim, so picking a pair of swimming trunks would be a bit pointless, you see.''

''Hm? A naval officer unable to swim?''

''W-Well I'm not exactly expected to be swimming on the job, am I?''

Takao chuckled quietly. ''I suppose not. Perhaps you should ask Atago then for some lessons, I'm sure she'd be willing to teach you.''

''I have a feeling she'd do more than teach me to swim.'' The Commander dryly remarked. ''Your sister is very... touchy-feely.''

''Don't I know it.'' Takao agreed with a sigh. ''She never learns. Perhaps I should start whacking her with my scabbard when she does that.''

The two of them chuckled, the sound soon accompanied by one of their chairs shifting – and I-58 pressed herself into the wall next to the potted plant when Takao walked out, hiding. The cruiser didn't notice her, muttering to herself about Atago's perversity and making her way towards the break room, undoubtedly going to make her and the Commander some tea. I-58 saw her chance and took it, slipping around the potted plant without so much as a peep, and then stepping into the Commander's office.

''Hm?'' He noticed her immediately; offering her a warm smile. ''Afternoon Goya.''

I-58 blushed at the nickname, smiling shyly at her crush as she approached his desk. ''Afternoon, Commander... here's the documents you wanted...''

''Mm. Thank you.'' He accepted them and set them off to the side to be marked.

I-58 shifted, mustering up her courage to speak once more. ''Also, Commander...?''

''Yes?''

''I overheard you telling Takao-san you couldn't swim.'' She brought up with a light, demure blush. ''Since everyone will start to want to go to the beach at this time... you'd need to swim...''

''Yeah. It's a bit awkward like that.'' He chuckled sheepishly. ''I'll just have to cheer from the sidelines and play volleyball.''

I-58 flashed him a shy smile. ''I can teach you to swim... i-if you'd like...?''

The Commander gave her a surprised look. ''Oh? I mean I'd appreciate it, but I wouldn't want to impose?''

''It's fine.'' She hurriedly reassured, hearing movement in the hallway. ''Meet at the pool after work, I-I'll be waiting!''

With rosy cheeks I-58 swiftly fled, a barely-restrained smile quivering across her lips.

X-x-X

Hours passed, and as promised the Commander arrived at the pool shortly after work ended.

The pool itself was, perhaps surprisingly, rarely used despite it being summer. This was largely since most Ship-Girls just went down to the ocean to play, since it meant they could be a bit more wild without having to worry about damaging something – unlike if they were stuck in a pool, where an accidental kick could crack the beige tiles or damage the drains. Thus it made for a perfect place to teach the Commander to swim.

Adding to that the pool – a modest rectangular pool located nearer the edge of the base – was surrounded on all sides by a high fence and a modest hedge, providing the privacy to give her the confidence to take control. Since he couldn't swim he'd be relying on her completely to keep him from drowning, so she couldn't just meekly step back; it was up to her. Perhaps a bit of an over-exaggerated way of putting it, but it got her heart pumping with determination.

I-58 glanced up as she heard the metal gate rattle, a smile spreading across her face as the Commander entered, clad in a pair of brown shorts. ''...ready to start, Commander?''

''Yeah.'' He chuckled sheepishly. ''I'll be in your care.''

Blushing lightly at his words I-58 slipped off the edge of the pool, plunging down into the water. On instinct her legs kicked and kept her afloat, allowing her to casually swim over to the metal ladder at one corner of the pool, waiting. It spoke of the trust he had in her that he didn't hesitate too much, only a touch of reluctance in his eyes as he eased his lower body into the water.

''Easy.'' I-58 whispered, taking one of his arms. ''I won't drop you.''

He nodded slightly, slowly easing himself off of the ladder – slowly starting to kick his legs at her whispered instructions. When he began to struggle she helped hold him up, giving him time to find his equilibrium before she loosened her hold once more, teaching him how to maintain his buoyancy. It wasn't particularly hard, and the Commander certainly didn't have a fear of water to overcome, making their session rather... therapeutic.

After just a short fifteen minutes he had the basics down, allowing them to move onto the next stage – getting him to float on his back. She laid behind him and guided him along, the position helping hide her flustered blush; embarrassed to feel his warm body against hers. Mercifully the Commander was too busy following her instructions to notice her embarrassment.

'...his body is so warm...' I-58 thought to herself, holding him tighter. '...he smells nice too... Mm...'

''Goya?''

''A-Ah?!'' The Submarine snapped out of her reverie. ''U-Um, yes?!''

''What are we practising next?''

''Oh... um, we should probably practice you holding your breath. Let's move over here first...''

X-x-X

Weeks passed.

One summer afternoon became many more, both the Commander and I-58 meeting at the empty pool to practice his swimming skills. Much to her delight he got the hang of it fairly quickly and, under her gentle tutelage, slowly evolved into a decent swimmer. He wouldn't be winning any international awards for it, but he was comfortable with it now and could hold his breath underwater for a considerable amount of time.

At the same time I-58 relished the newfound time she had spent with the Commander. From the little moments of holding him and guiding him in his swimming lessons, to the more intimate moments after swimming – of laying against the edge of the pool and catching their breath, both just idly chatting. Or even of when they both departed into the changing rooms next to the pool, the male-female changing rooms on either side... and as embarrassing as it was, she was almost tempted to go peek. She restrained herself barely, if only to avoid being labelled a pervert.

But by that point her feelings for him had grown to uncontainable levels; she couldn't hold them in any longer, and thus she decided to take a chance.

''Haah...''

I-58 exhaled a slow breath, the air cool with a slight chill – courtesy of the dark sky overhead. It was practically night now, what little light remaining fading and leaving the pool illuminated only by the bright moonlight, no clouds to hide the full moon tonight. She had invited the Commander out to swim at night for a change, using the excuse of practising at night as a way to lure him in. He had accepted quite eagerly, the memory of his eager visage darkening her cheeks.

The Submarine walked out of the female rooms shyly, sparing a look around the cobblestone path for anyone else – but by this time most people were in bed or preparing to be so, the lights from the dormitory building going off one by one. She took some comfort in that, quietly walking up to the metal gate and creaking it open, a cool wind tickling her swimsuit-clad body as she entered the pool area. The moonlight helped illuminate the beige tiles and cream stone, the water dark and reflecting the moonlight off of it. She liked nights like this.

A door behind her opened up. ''I-58?''

''I'm here, Commander.'' I-58 demurely called out.

Footsteps approached, and the Commander entered the pool area as well. He had abandoned his initial pair of brown shorts for a pair of proper swimming trunks, having bought a pair after multiple swimming sessions together. Smiling at him the Submarine girl hurriedly approached the edge of the pool, jumping – and a splash of water erupted as she dove into the water, becoming submerged beneath it.

Then with a kick of her legs she ascended, and gasped in a fresh lungful of air as she breached the surface, her emerald eyes finding the Commander's eyes. He grinned at her and jumped too – hitting her with a splash of water as he dove into the water next to her, unheeding of her brief yelp. The water showered down onto her, the water hissing around her as the droplets slowed; preluding the head that burst back up from below the water.

''Haah~!'' The Commander inhaled a breath, grinning. ''Been wanting to do that all day.''

I-58 blushed at that, happiness swelling in her heart at the thought – knowing that she had been the one to give him that chance, the ability to enjoy the water like she did. ''...Mm.''

Not losing his grin the Commander swam closer – and then poked her stomach. ''You're it.''

Then with a snicker the man swam back, diving down beneath the water. Squeaking in surprise I-58 was left frozen for a second... before a burst of competitiveness overcame her embarrassment, and she dove down after him – soon catching up and tagging him back. The Commander however proved his newfound skill, and after barely a minute of chasing her agile form through the water, he tagged her again; continuing the came of tag for minutes on end.

The game didn't last long, but by the time she tagged him for the fifth and final time both were panting and smiling. I-58 grew flustered just seeing him make such a expression at her, prompting the Submarine to float over towards the edge of the pool; leaning against the slight, smooth ridge there and just catching her breath, mentally reminding herself to work on her own stamina in future.

''So.'' He idly swam closer to her. ''What are we doing tonight?''

I-58 brain short-circuited. ''I... um... uh...''

'Excuse, w-what was my excuse...?!' The Submarine mentally panicked. She'd completely forgotten the 'reason' she'd even invited him out.

''Goya?'' The Commander called out to her curiously when she didn't reply.

I-58 struggled to find a reason, an activity they could do that they hadn't already done... and came up short. Which left her with only one option left; honesty.

''I...'' The Submarine swallowed, shy. ''I actually invited you out here tonight to talk.''

The Commander blinked in surprise, but didn't speak; waiting for her to continue.

I-58 did after a moment. With the slow swish of water the Submarine swam the short few feet closer to him, laying both of her slim hands on his toned shoulders and bringing her head against his chest – resting her ear against his chest. Faintly she could hear his heartbeat, the sound hardly muted by the slow kicking of their legs, the water beneath them stirring from the movements. It spoke to how trusting the Commander was that he didn't even ask what she was doing; trusting her to explain.

So she did. ''...I um... I really like you, Commander... I-I've been meaning to say it for a few weeks now...''

A hand laid itself on her lower back, prompting I-58 to look up into his eyes as he spoke. ''...I see. Sorry for not noticing that.''

''No, it's alright... I wasn't trying to drop a hint or anything.'' She shyly responded. ''But... I was thinking that... we could... y-you know...?''

His other hand came up, cupping her chin. ''Do something like this?''

I-58 didn't even get the chance to wonder what he was implying before the Commander leaned down, connecting his lips with his. In an instant the Submarine mentally shut-down, freezing up for a solid few seconds – before her mind then kicked back to life, and she eagerly pressed her lips back against his, reciprocating the kiss. He smiled into it, loosening his hold on her small chin and holding her cheek instead, his thumb sliding over it slowly as they made out.

Then with a soft, mutual exhale, their lips drifted apart. Their eyes locked, soft warmth in his gaze and adoration in hers – before without a word they kissed once more. It was deeper this time; more passionate, more wanting. She wrapped her arms around his neck tightly and pushed her body against his, tempting him to hold her waist to compensate, the slow kicking of their legs keeping them above the water and letting their lips convey their words.

''Mmph~'' I-58 mewled into the kiss – before with a soft smooch their lips broke apart. ''Hah... hey, Commander...?''

''Mm?''

I-58's cheeks burned. ''I-I know something we can do, tonight...''

''And what might that be?'' He murmured, rubbing her hips.

The Submarine girl blushed, flashing him a shy smile as she shifted out of his grip. ''Have you ever... swam naked, Commander...?''

Warmth swiftly coloured the Commander's cheeks, his throat closing up in embarrassment and leaving him able to only shake his head in denial. Smiling timidly I-58 reached under the water, undoubtedly pulling on something before pushing it off of her waist, the gleam of the moonlight hiding what might be happening beneath the water. Then without breaking eye-contact she slipped her hands up and began to untie her bandeau top, turning away so he could only see her back – her top soon sliding off, revealing her shoulder blades more clearly without it on.

She sunk lightly down into the water, only her head visible above it. ''...t-take off your shorts too.''

The Commander blushed – and obeyed. It took a simple tug to get them down to his knees and a few kicks to get them off, feeling his swimming trunks float off into the water. The feeling of being naked in the pool was a strangely pleasant one, feeling the water brushing against his skin; but being in the pool with an equally-naked I-58 made it less embarrassing, and more arousing. Something that compelled him to float over to I-58.

''Commander...'' She whispered, shutting her eyes.

He leaned down, capturing her lips in a slow, romantic kiss, both of his hands coming to rest on her sides. Together they stayed like that, her hands tentatively resting on his shoulders as they continued making out, the slow smooching and smacking of their lips the only thing audible other than the stirring water beneath them. When they broke apart they drew in some fresh lungfuls before going right back to kissing, neither getting tired of the simple but romantic action.

Then I-58 drifted back from the kiss, looking him in the eye. Her cheeks were hot and her eyes demure, a little smile tugging at her lips – before she began to sink beneath the water, pulling him down too. Filling his lungs one last time the Commander dove with her, shutting his eye briefly as his face became submerged... and when he opened his eyes he found himself underwater, and with a naked I-58 in front of him.

'Beautiful.' The thought struck him, soaking in the sight of I-58. His eyes ran over her slim shoulders and smallish breasts, over the pink peaks topping the smooth mounds, her flat stomach and past her bare slit, her lithe legs slowly swishing beneath the waves as she pulled him down.

She loosened her hold on him, holding his hand and no more. When they were comfortably in the middle of the pool's depth she drew closer to him, smiling bashfully as she wrapped her arms back around his neck, pulling him into a kiss, He parted his lips, trusting her – and was surprised to feel oxygen refill his lungs when they kissed, her exhale breathing air into him. She pulled back a second later, swallowing slightly, before kissing him more intimately, no longer breathing oxygen into him but just making out instead.

Emboldened by the kiss the Commander ran his hands over I-58, touching her. He started carefully at first, just running his palms over her shoulders or feeling up her lithe arms, his hands then daring down to her waist, copping a feel of her perky butt. She mewled into his mouth, the sound filling his mouth and encouraging him to deepen the kiss with her, their lips sealed together to stop any water getting in. Growing bolder he groped her ass more firmly; digging his fingers into her soft rear and then squeezing the back of her thighs, mapping her body out in his mind.

''Phaah~'' Bubbles escaped them as they both exhaled – prompting I-58 to lean back in, kissing him and replenishing his oxygen.

Perks of being a Submarine, he supposed.

His hands worked their way up her stomach and to her chest, both hands cupping her boobs from below and holding them, giving them a tentative squeeze. They weren't the biggest but they fitted perfectly into his hands, the softness amplified by the water. Bubbles passed I-58's lips as she moaned again, the sound inaudible but the look of arousal on her face unmissable, encouraging him to flick her perky nipples about with his thumbs, rubbing them too.

I-58 paid him back, her lithe hands roaming over his torso and touching him all over. They broke away from the kiss a second later and her eyes went down, embarrassment colouring her pale face as she looked at his slowly-hardening cock – and then tentatively grabbed it. She stroked it a little and peeked up at him as she did so, the cute look of arousal in her eyes tempting him to put his own hand between her legs, dragging his fingers along her slit.

''Mmphaah...'' I-58 made another muffled moan; bubbles arising from her lips.

A few bubbles escaped his own mouth as a groan bubbled out of it, caused by the soft hand that stroked up his cock. I-58 kissed him in reply, breathing air back into him even as she tenderly touched his cock, not even really stroking it – more playing with it than anything else. She tugged it a little, she ran her fingers along it, she poked it with her fingertips, she was more exploring than truly getting him off. He gave her the same treatment in response, letting some curiosity bleed into his actions as he touched her pussy, his fingertips rubbing her folds or his palm cupping her womanhood and groping her there; the latter action causing her to float up slightly as he accidentally pushed her upwards.

I-58 let her fingers drift away from his cock, her lips leaving his as well. She stared into his eyes for a long moment, snaking her arms around him and pushing her naked body flush against his own, letting him feel her small breasts press against him. She pecked him on the nose and then swam over him, her stomach briefly eye-level followed by her waist, his eyes following her as she went over him – and then curved back down, kissing him on the back.

And thanks to that, he could feel how her lips moved.

''Tag.'' She mouthed.

A slight grin worked its way onto the Commander's face and he twisted around, grabbing I-58 and planting a kiss onto her stomach, holding his breath as he did so. I-58 smiled bashfully, chasing him when he swam backwards – using her superior speed to dive under him and then come up from below, entering his path and kissing him in the centre of his chest before fleeing from his grasping hand with all the nimbleness of a dolphin.

However there was only so much room in the pool for her to swim. The Commander chased her, attempting to 'tackle' her only for her to swim over his head, her lithe legs escaping his grasping hand when she tucked them in close, smiling down at him. She ascended up and he followed, watching as she twisted around and then dived upside-down, staring into his eyes as she passed. He went with her, diving down – and then planting a kiss on her lips, the upside-down nature of her lips strangely erotic.

''Phaah~'' She breathed fresh oxygen into his lungs, stalling the need for them to resurface.

And then she broke off the kiss, pecking him on the cheek. Giggling silently the Submarine dived past him – only to gain a surprised expression when he grabbed her ankle, pulling himself close to her and kissing her on the back of her thigh. She twisted, catching his arm and planting a return kiss on his shoulder. He got her on the cheek. She got him on the nose.

They both got each other on the lips; wrapping their arms around each other and sealing their lips together, bodies flush together. With her breathing oxygen into his lungs there was no need to break apart for air, allowing them to drag out the intimate kiss for a small eternity, their lips pushing together or sliding along each other's. When I-58 daringly pushed her tongue into his mouth he retaliated with his own, their wet appendages wrestling between their mouths and heightening their arousal.

Until with a slow exhale of bubbles they broke apart, looking into each other's eyes.

Then slowly I-58 took his right hand in her own, guiding it to her breast – her request obvious. He obliged, soaking in her expression as he gave her soft breast a squeeze, watching how her lips pursed together and a shudder lanced through her; arousal evident. His other hand came up, groping her other breast and eliciting a bubble-filled moan from I-58, the sound barely audible but the look of want in her eyes easily visible.

The dark-haired girl shifted back a little, coaxing his hands off of her boobs – and he had the pleasure of watching her gracefully turn herself upside down, smiling at him as her legs swayed above her. She kicked her feet lightly, pushing her down and grabbing onto his hips-

-before the Commander then felt a pair of lips wrap around the tip of his cock. He shuddered, grabbing onto I-58's sides and enduring the hot warmth that enveloped his cock, pleasure burning his shaft as she took more and more of him into her mouth, sliding her lips along it. She sucked it slowly, the water preventing her from moving her head too fast but the sheer warmth of her mouth pleasurable in its own right.

''Phaah...'' The Commander exhaled some of his air, his cheeks burning as he found I-58's own waist at eye-level – his gaze locked onto her smooth pussy.

With only a second's hesitation he held her waist, and then put his tongue to work. Whilst holding his breath he dragged his tongue along her folds, feeling I-58 convulse in his hands and encouraging him to lick her more, his tongue eagerly sliding over her smooth slit or wriggling against it. Her thighs pressed against his cheeks and held him there, the erotic position only encouraging him to keep doing it; forced to stop only when his air supply began to wane.

Feeling that he tapped her thigh, prompting I-58 to slide her lips off of his cock, her legs untangling from his head. With all the grace of a mythical mermaid she arched her back and reoriented herself, flashing him a pretty smile a moment before she kissed him, breathing more air back into him. He took the chance to grab her butt and grope her, feeling I-58's lips curl up into a happy smile, her own hands squeezing his shoulders.

Then with an exhalation of bubbles they parted. Smiling at him I-58 pointed a finger up and slowly began to ascend, keeping an eye on him as he ascended with her, both exhaling bubbles – until finally they breached the surface of the water.

''Haah!'' The Commander inhaled fresh lungfuls of air, the crispiness of the night air refreshing against his wet skin. ''Wow.''

I-58 giggled, pushing against him. His arms wrapped around her waist on instinct and their lips found each other's without so much as thinking, muting I-58's pleased moan – the Submarine wrapping her arms around him and gently pushing him back. The Commander didn't resist; making out with her as she guided him back over to the wall of the pool, his back resting against it and one hand grabbing the slight underwater railing, keeping himself afloat easier.

''This way...'' I-58 whispered into his lips. ''I can keep going without having to worry about you getting air.''

The Commander didn't get the chance to ask what she meant, not that he needed to as the Submarine dived beneath the water once more – and he shuddered as she grabbed his waist. He felt a pair of soft lips touched the tip of his cock a moment later, preluding the lips that seamlessly slid down his cock, coaxing out a low moan from his throat. He restrained the sound as best he could lest they be overheard, yet his mind was largely focused on the pleasure tingling up his cock; a pleasure only amplified by their prior underwater play.

''Ohh...'' The Commander screwed his eyes shut.

The water in front of him stirred as I-58 moved her head; bobbing it back-and-forth repeatedly as she dragged her lips along his cock, sucking it. Her hand came up and briefly attended to his balls, hefting them about curiously before she instead gripped the very base of his cock and stroked it while she sucked off the rest of his shaft, the hotness of her mouth contrasting the coolness of the water.

I-58 adjusted her hands, one gripping his thigh and the other holding his hip, and he let out a strained groan when the Submarine took him deeper, the tip hitting the back of her throat. Yet I-58 didn't slow down, any gags muted by the water as she repeatedly took his cock into the wet warmth of her mouth, her lips pursing tight around his meat as she grazed them along his shaft up to the tip, and then pushed right back down to the base.

''Hah, Goya...'' The Commander murmured out, reaching under the water – blindly laying a hand on the back of her head.

The water blurred her visage somewhat, making it hard to see her expression, but when she continued sucking him off with vigour he knew she didn't mind – another groan bubbling up out of his throat when he felt her tongue stroke the underside of his shaft, the wet appendage tickling his girth and heightening the needy throb swelling up it. Flashes of what they just did underwater came back to him and he wondered what she looked like right now.

Thus, he shifted down. I-58 stopped bobbing her head long enough for him to submerge himself fully, his lips pursed tightly shut as he held his breath; and a sharp shudder lanced through him as I-58 resumed her blowjob. With both of them underwater he could see the dark-haired girl intimately as she blew him, her lips sliding along his girth hypnotically and her emerald eyes peering up at him demurely.

''Mn...'' Bubbles passed his lips and his grip on the wall tightened, feeling a fire rapidly rise up his cock, his muscles tightening up as all her teasing came to hit him at once.

Whether or not I-58 noticed she continued giving him head, her tongue lovingly curling around his cock or stroking the underside, her teeth mindfully kept out of the way as she sucked his throbbing cock relentlessly. Her grip on him gave her the leverage to bob her head faster, the inviting heat of her mouth heightening the tingling, buzzing want that swelled up towards the tip, the need for release an inescapable one.

Until finally he came. He seized up, barely managing to keep holding his breath even as he pushed I-58 down his cock, bucking his hips forth at the same time – shooting thick ropes of cum down her throat. The Submarine girl didn't resist, her eyes fluttering shut as she pressed her hot tongue flush against the underside of his cock, helping coax out the milky spurts that she readily swallowed, hastened when she groped his balls and coaxed out more of his seed.

Waves of pleasure washed over him, shudder-inducing and taking his breath away, until mercifully the undulation of bliss waned, and he ascended the short two feet up to the surface.

''H-Haah!'' The Commander released his pent-up breath and inhaled a fresh one, shuddering when the lips around his cock left and I-58 resurfaced. ''Crap, that felt... a-amazing...''

I-58 blushed a deep crimson colour, a bashful smile on her face. ''T-Thanks... I'm glad you liked it...''

''Loved it, more like.'' The Commander murmured back.

The Submarine just looked away with her smile unfading, visibly pleased. He savoured the cute expression, both of them just floated there for half a minute until he had caught his breath, his cock still tingling with pleasure after her act.

And then the moment he felt well enough, the Commander decided to return the favour – drifting over in the direction of the ladder; pulling I-58 along by the arm. The Submarine was confused but followed him along, looking at him curiously when he held her sides and gently nudged her towards the ladder. It was only when she grasped onto the silver handlebars and leaned back against it that she understood what he wanted, blushing furiously as he laid a hand between her thighs, cupping her pussy.

Then with a slow push, he eased two fingers inside of her womanhood. I-58 pursed her lips and visibly shuddered, a soft whine escaping her despite her best attempts. He sealed his lips against hers and devoured any further sounds that dared try escape, his free hand cupping her right tit and gently groping it, his attention divided between her lips and her sex – his two fingers slowly pumping into her folds. Her inner walls clamped around his intruding digits, searing hot as they gripped them; the erotic sensation only encouraging him to keep moving his fingers.

''Ah...!'' I-58 gasped against his lips. ''Commander, that feels- Mmph~!''

Another kiss cut her short; tempting the Submarine to release the moan into his mouth. Shivering in excitement the Commander added a third finger, pushing all three digits into her sex and feeling her inner walls tighten around his intruding digits, failing to stop him from thrusting said digits inside of her. He pushed them in deep or scissored them apart inside her, coaxing out hot gasps and soft cries of pleasure from the petite girl, her head briefly tipping back before he reunited their lips in a kiss.

Then his fingers slid out of her pussy, pressing against her folds and rubbing her off. The Submarine buckled, back arching before she bent the other way, her stomach folding in as she bent forwards – breaking off the kiss and moaning into his shoulder instead. Just feeling her hot breath on his shoulder was a turn-on in and of itself, and tempted the Commander to stop his rubbing motion; instead cupping her crotch and pushing her up.

I-58 took the hint, whimpering as she pulled herself up another few ladder steps – and the moment her waist was above the water the Commander grabbed it, lifting it up. Predictably I-58 squealed in surprise, steam nearly escaping her ears as he buried his head between her legs, assaulting her slit with a flurry of licks. His tongue stroked over her smooth folds aimlessly at first, but after a second of adjusting his grip he spread her folds open with two fingers, allowing him to push his squirming tongue inside of her.

''C-Commander!'' I-58 cried out in pleasure. ''T-That-!''

His tongue invaded her pussy, hungrily swirling around in experimental circles and causing her to seize up, clinging onto the ladder's railings for dear life – her body nearly horizontal as he held her up. His nose pressed flush against her clit and his tongue squirmed around her insides, licking her inner walls or prodding her sensitive spots, eliciting no shortage of cute gasps and cries, her chest heaving with every laboured breath she drew.

The Commander was swift to spice things up, giving I-58 no reprieve as he wiggled his tongue side-to-side or shook his head slightly, rubbing his nose against her clit whilst he tongue-fucked her. The Submarine gripped the railings in a white-knuckled grip, her pursed lips being the only thing stopping her from squealing in pleasure, and even then little moans and gasps still got out, her thighs squishing against his cheeks as she held onto his head.

''Commander, Commander!'' I-58 could only call his name as the heat inside her grew. ''I-I- ah, hah! A-AH!''

A cry of pleasure, a buckle of her body – and I-58 orgasmed. Her slick inner walls spasmed around his exploring tongue, smothering the appendage and squirting around it. The Commander lapped up all her honey, prolonging her powerful orgasm with his tongue motions and sending jolting spasming up through her lithe frame, the convulsions a decidedly erotic sight from his perspective.

And then like a marionette with its strings cut I-58 went limp, releasing a hot moan of bliss as she went slack. Supporting her weight he withdrew his tongue and loosened his hold on her waist, easing her lower body back down into the water, a grin on his lips as he watched her hold onto the ladder's railings with barely-abled grips.

The Commander held onto the railings too, leaning in and grinning cheekily at her. ''How was that?''

''A-Amazing...'' I-58 breathed out, smiling back as best she could when gasping in air.

In response he leaned in, claiming her lips in a kiss. I-58 mewled into it, smooching him back – the two of them simply making out for a romantic minute, their legs swishing together under the water. She eased herself down the steps more until his waist was nearly level with hers, allowing him to feel his swollen cock press against her folds, the sensation tempting him to rock his hips and grind on her.

I-58 quivered at the slow friction, moaning into his mouth one last time before breaking apart. Their eyes locked and their cheeks burned, both knowing what they wanted to do next but neither quite able to voice it, the embarrassment of doing so too great... for a couple of moments. The desire to continue outweighed the embarrassed, and soon I-58 voiced her want.

''Commander.'' Shyly the Submarine reached down beneath the water, curling her lithe fingers around his cock – pressing it against her pussy lips. ''...please.''

He shifted closer. ''You sure?''

''Mm. Let's do it.'' She said in a quiet, sincere voice, smiling adoringly at him as she did so.

The Commander didn't even contemplate denying her; wanting it as much as she did. Thus he grasped his erect length and lined it up with her folds, shivering as he rubbed the tip along her slit several times, rocking his hips in tandem with the motions. I-58 bit her lip cutely and held onto the silver railings on either side of her, nervous but eager as he soon pressed himself against her entrance, and pushed inside.

''M-Mm!'' I-58's bubbling cry of ecstasy permeated the air; soft and sweet and swiftly muffled as he kissed her, devouring the arousing sound.

Groaning into her mouth the Commander held onto the ladder's railing, rocking his body forth and pressing himself into her, intimately feeling her quivering inner walls clench tightly around his intruding cock, meeting brief resistance before he snugly buried himself up to the hilt inside of the petite girl. Despite how ungodly tight she felt he still managed to get it all in, albeit barely; left panting from the feeling of her clenching around his girth.

Then with a slow roll of his hips he began to pull out. He felt her clench around him, almost as if begging to not leave her empty – the arousing thought tempting him to pull out a little more, leaving just under half of his dick buried inside her womanhood, before promptly pushing right back in up to the hilt, loving the muffled squeal he pulled out of I-58's throat, one of her arms wrapping around his neck and holding him into the kiss.

''Mmph~!'' The Submarine girl wrapped her legs around his waist, helping pull him into her. ''M-Move...''

The Commander obeyed. Pushing past the pleasure teasing his cock he began to thrust into I-58, his cock sliding seamlessly into her tight hole before he pulled it partway back out, unheeding of the tight wet flesh that strangled his shaft. The water slowed his momentum no matter how much force he put into moving his hips, slowing his thrusts yet making it no less pleasurable for them both – if anything being able to move slower made it more romantic, more intimate.

''Oh... ah... ah... haah...'' Cute sounds escaped I-58 each time he sheathed himself inside of her. ''Commander, it feels so good...!''

''Yeah...'' He murmured back tightly; releasing a groan when he pushed back a second later.

I-58 giggled shyly, pulling him into another kiss and coaxing a mutual groan out of them. Keeping one hand on the ladder's railing the Commander put his other hand on her ass, helping pull her body towards him as he drove himself into her, speeding up the process a little – chasing the addictive friction that teased his cock, the feeling of being inside her driving him wild. Every slow thrust of his hips made the water slosh around them, the sound floating through the air and hiding their mutual gasps and moans.

The Commander was the first to break off the kiss; instead diving in and kissing his lover on the neck, trailing his lips along her wet flesh. I-58 mewled sweetly into his ear, her feet locking behind his ass and pulling him in harder, silently begging for more. The water denied her that, forcing them to take it slow, drawing out their intimate act for even longer. Every clench of muscle, every scraping thrust, every pelvis-to-pelvis bump; they felt all of it in intimate detail.

''Mn, hah, hah...!'' I-58 panted, eyes finding his as he pulled away from her neck. ''Commander...''

He smiled at her, resting his forehead against hers – staring straight into her emerald eyes as he kept thrusting, feeling her tight hole hold his cock, the tight grip heightening the need throbbing up it. Even with how slow they were moving his orgasm was already beginning to swell up, the wet heat that his cock rubbed against draining his stamina. Several times they both broke apart from the kiss just to look at each other, watching as his cock entered her pussy in intimate detail. His own gaze roamed further up, admiring her nude body in its entirety. I-58 blushed but made no move to cover herself, not that there was much need.

''I'm... Mm... almost there...'' I-58 whispered with rosy cheeks.

''Me too.'' He pecked her on the lips.

She pecked him back. ''Y-You can... do it inside.''

Another kiss. ''You sure?''

She nipped his bottom lip. ''Mm. I... I wanna feel you inside me...''

The demure admission darkened her cheeks, and fuelled his own lust – a groan escaping the Commander as he put all his energy into thrusting, fighting against the water to thrust as hard as his body wanted to. The water sloshed louder and their lips hovered apart by mere inches, hot breaths tickling each other's lips as they waited, anticipating the big moment. It rapidly came closer, his rough thrusts and her tightening insides bringing them both closer to orgasms.

Until he felt a spike of heat shoot up his cock, and mashed his lips against I-58's. He pressed the Submarine flush against the wall, feeling her vaginal walls tighten sharply around his cock – and with a mutual moan they climaxed together, his seed pumping in deep and flooding her womb in an instant, his hips jerking and thrusting, each rock of his hips helping shoot more cum into her quivering depths.

Then slowly their orgasmic highs began to wane, his thrusting hips slowing – until with a mutual moan they stopped, breaking off the kiss so they could pant in some air.

''Hah, haah...'' I-58 smiled beautifully. ''I-It's so hot... eheh...''

The Commander chuckled under his breath, leaning in and kissing her. I-58 melted into it happily, the two of them making out and throwing their tongues into the mix, wrestling their wet appendages about between their mouths. They stayed with bodies flushed together for a long minute before he pulled out, the slow withdrawing of his cock making I-58 shudder; releasing a quiet moan when she was left empty once more.

''Ahh...'' I-58 exhaled, breaking off the kiss. ''Commander...''

He smiled, briefly glancing back at the water behind them; an idea shaping in his mind. I-58 clearly had a similar one, both of them sharing a look and blushing. Underwater sex would be exciting... but moving for long enough would be a task and a half.

Thus he came up with a solution; whispering it against her lips. ''Let's do it up here and finish down there.''

''Okay.'' She smiled against his lips, pecking them a second later. ''Just give me a second.''

He obliged, leaning back a little. I-58 climbed up the pool ladder, giving him an arousing view of her naked, dripping-wet body, before she twisted around on the narrow steps and bent herself over, planting her hands upon the stone ground. The erotic view of her ass was all the motivation he needed to climb onto the step with her, both of them briefly fumbling so they could get into position properly... before he held onto the railing with one hand, grasped his sensitive cock with the other, and eased himself back into I-58.

''Ah~'' The Submarine moaned as he pushed in; shivering at the now-familiar sensation.

The Commander let out a moan of his own, grabbing her right hip with his free hand, and began to thrust. His cock scraped against her sensitive insides as he pulled it out only to drive it back in, rocking his hips back-and-forth slightly at first. However once he got the hang of it he eagerly began to pump into I-58, the lack of water resistance allowing him to slide in much easier; slapping his pelvis against her ass.

I-58 felt that fact intimately, her shoulders buckling and an adorable yelp escaping her lips, her emerald eyes wide as he hit her deepest parts with pleasurable force. Many more thrusts followed the first, the disjointed claps of flesh rapidly rising into loud, skin-smacking thrusts that jerked the Submarine's body forwards before she pushed her ass back, moaning his name as she impaled herself upon his cock.

''Ah, Commander!'' I-58 cried out in pleasure.

''Keep your voice down.'' He groaned back.

I-58 pursed her lips and jerkily nodded, whimpering in bliss as he pistoned into her, the friction of his cock sliding in-and-out of her melting her mind – only amplified by the fact she was still left sensitive by her prior orgasm. The position also allowed them to be more creative, his hands grabbing her hips when he wanted to pound her pussy faster or his hands groping her chest when he wanted to hear her moan, the sweet sounds she made meant only for him.

She paid him back in turn. With a clenching of muscles she tightened around his cock, squeezing his sensitive length and igniting his nerves, or when she arched her back she leaned over her shoulder and kissed him – the latter tempting him to grab her ribs and hold her in that position, moaning into her mouth as they made out. The slapping of his pelvis hitting her perky ass accompanied their smacking lips, a string of hot moans escaping their lips and only encouraging them to keep making out, their tongues tentatively prodding about in fits of lust.

''F-Faster!'' The Submarine whispered against his lips, leaning down again.

The Commander obeyed, pursing his lips and groaning past them as he pounded the dark-haired girl with renewed vigour, stubbornly ignoring the needy throb that climbed up his cock. If he listened closely he could hear the wet squelches of his cock plunging into her pussy, the noise partially muted by their smacking flesh and heavy gasps, both of them moving their bodies in tandem to maximise their pleasure.

Then just as he felt a hot throb begin to rise up his cock, the Commander pulled out – gasping as his cock left the hot embrace of her pussy and was exposed to the cold night air. I-58 whimpered at the lack of friction, honey dripping from her womanhood and her ass swaying slightly, almost as if subconsciously begging for him to keep pounding her. He felt the same; his swollen shaft throbbing and with pre-cum glistening at the tip, so very near his own orgasm.

''C'mon.'' He whispered.

I-58 nodded, pushing past him and easing down into the pool – a light splash preluding his own descent. The Commander watched her dive beneath the waves and took one last gulp of air before following her down, admiring I-58's cute ass as she swam down to the bottom of the pool. She twisted around once she reached it, smiling excitedly up at him as he got on top of her and wrapped her arms around him, sealing her lips against his in a kiss; breathing fresh oxygen into him into him.

The Commander kissed her back, one hand going between their bodies and grasping his swollen cock, pushing it against her pussy – and they both groaned as he sheathed himself inside of her sex once more. They were still both so close that the mere penetration threatened to make them cum, his cock twitching needily inside of her, encouraging him to start thrusting. The water made it hard to move but the slightest bit of friction was enough, the slow rubbing of flesh-on-flesh getting them off.

I-58 hastened her own orgasm, wrapping her legs around his waist and rubbing her clit with one hand, using her other to hold his head down against hers – making sure the oxygen flow didn't stop for a second. He paid her back wholeheartedly, the underwater missionary position proving to be too much for either of them, the slow friction bringing them to their limits.

Until finally his orgasm hit. ''Phaah!''

I-58 tightly held him down against her, convulsing beneath him as he blew his milky load inside of her once more. Her vaginal walls strangled his cock, wringing his seed out of him and prolonging the powerful moment, the sensation of unloading inside her underwater only dragging it out that few extra moments, feeling her honey mix with his gushing load.

Thrust by thrust he buried himself inside the Submarine until eventually he ran dry, his thrusting hips coming to a stop. For a moment they stayed together, her breaths refilling his lungs and allowing them to stay underwater together. Then with a slight push on his chest I-58 made him pull out, smiling adoringly up at him as she took one of his hands in hers and nodded upwards. He agreed with a nod of his own, and together they both slowly ascended back up, their lower bodies still tingling and weak from their orgasms.

''Haah!'' The Commander inhaled a fresh lungful of air, water droplets running down his face.

I-58 panted next to him, wrapping her arms around his shoulder and holding onto him, simply resting her head against this shoulder. He laid his other hand on her lower back, both of them just floating in the middle of the pool for a moment before gradually making their way over to the edge, leaning against the wall to catch their breaths.

''This was nice.'' I-58 softly said, leaning on his shoulder. ''...thank you for coming, Commander.''

''Thanks for inviting me.'' The Commander responded gently, kissing her forehead. ''We should probably get out now though.''

''Mm. And... Commander?''

''Yes?''

Lips pecked his cheek. ''I love you.''

''Ah... love you too, Goya, aha...''

I-58's delighted giggle rung sweetly in his ears.

[END]