A/N: Honestly couldn't think of a good title when I wrote this thing last week, so I went with this for a title and it stuck.

Asta's quite cute as well; a shame she doesn't have much artwork. Her 'oh it would be' line when using her skill is charming indeed.

That aside, I hope you do enjoy~

Star Railed

''Hm... the Astral Express is truly something else...''

Asta's idle comment went unanswered as the pink-haired researcher wandered down the length of the Astral Express, eyes keenly admiring every little detail from the designs on the walls to the style of the structure – privately noting some small touches she wanted to implement back at the space station, and not just for aesthetic purposes.

It wasn't often Asta herself left the space station, but desperate times called for desperate measures. Several rare types of resources they badly needed couldn't be obtained easily from home port, and it was at the suggestion of one of her subordinates that she join the Astral Express crew since they were going in the same direction, enabling her to pick up the rare resources whilst in good company, rather than having to fork out the cash on hiring transport and a heavy escort. The stars knew well that the Antimatter Legion would be all too happy to grab her when she was out in the vast emptiness of space, for whatever twisted purposes they had in mind.

'Ugh, just thinking about it is making me queasy...' Asta grimaced, chasing away the intrusive thought. She was safe here, she didn't need to worry.

She had March 7th, the bubbly but quick-shot archer.

She had Dan Heng, the serene but swift striker.

She had Caelus, the handsome, valiant, noble bat-swinging-

Asta's thoughts were interrupted as she heard the sound of something shifted; of papers and boxes pushed and crushed under something heavier. Blinking the pink-haired girl wandered further down the corridor and took a left turn, her gaze falling upon a trash can...

...and her expression went flat as she found Caelus waist-deep in it, rummaging around. She could almost imagine a racoon tail emerging from his tailbone.

''Caelus.'' Asta sighed, making the boy stop. ''What are you doing? That's disgusting.''

A pause, then the handsome young man's face popped up. ''Looking for treasure.''

''Uh-huh. I doubt you'll find any in there.'' Asta said dryly.

''You'd be surprised.'' He shrugged and lifted his right hand, revealing... several rare synthesis materials. ''See?''

''How did you-?'' Asta trailed off and stopped herself. She shouldn't question Caelus; he... didn't follow conventional wisdom.

Or wisdom at all, really.

Why she liked him so much, even she didn't know.

''Come on, let's get back to your room, you look like you need a shower.'' Asta said, taking only a step closer before cringing. ''And smell like you need one, too.''

Caelus was unphased and just hummed an agreement, picking a banana peel off of his head and tossing it back into the trash behind him, walking back down the corridor. Asta followed at a comfortable distance; the two of them arriving at his personal quarters mercifully fast and a quick twist of the key allowing Caelus to lead her inside. It wasn't the first time she'd been inside so she paid the interior little mind, only that the wallpaper had been changed recently to the same greyish colour as his hair whilst the carpets were a lush, beautiful rose-red.

''Go on then.'' Asta sighed. ''I'll wait out here.''

At that, Caelus shook his head. ''You come in too.''

''Wha- no way I'm going in when you smell like a trash can!'' Asta squawked, no malice in her tone but simple disbelief. When it was clear he wasn't going in without her though, she relented. ''I... fine, you go in first though.''

Caelus bobbed his head at that, lips quirking up into a small smile that left Asta blushing, looking off to the side. He meandered through into the adjoined bathroom and Asta dutifully followed, letting her eyes run over the white tiled walls or the smooth beige floor, all of it sharp and modern-looking. The shower was off to the right, a slight lip stopping the water from overflowing as Caelus turned on the shower, and with a single sliding glass door to isolate it from the rest of the bathroom.

And then Caelus stripped. Unbothered of Asta's presence he stripped off one bit of clothing at a time, tossing them into a pile in the corner and apparently unaware of Asta's madly-blushing face, her wide eyes soaking in his toned back and muscled arms, his figure slender but undoubtedly honed from weeks of beating up enemies with a baseball bat. His ass caught her eye too, staring at it for far longer than appropriate, and it was only when he started to glance her way that Asta jerked her head to the other side, feigning looking at the bathroom.

Until he spoke. ''You too.''

Asta felt her cheeks grow hot but didn't complain, a quiet mumble escaping her as she slowly stripped. Her skirt came off first, hissing against her other clothes as it fell around her ankles and her blouse soon followed, unbuttoned and shed in short order. Caelus turned to watch but Asta didn't complain, her breathing growing a little heavy as she shrugged out of her bra and unclipped it, letting it fall to the growing pile under her. She felt his gaze on her breasts but said not a word; bashful as she removed the rest of her clothes before bending down, her fingers hooked into her panties, before they at last came down too.

Then at last she was as naked as he. ''T-There. Now get in!''

Caelus hummed slowly, openly and unashamedly looking her from head-to-toe – his gaze noticeably slowing near her chest and crotch – before without a word he turned and stepped into the shower.

Asta bit her bottom lip, shuddering. The air was warm so it wasn't that but she couldn't deny how hot and bothered it made her when Caelus looked at her like that. No ravenous lust, no boyish excitement, but simple earnest curiosity. She'd been on the receiving end of that curiosity before and, well...

For someone who lost their memories, Caelus gave amazing head.

Asta shook off the arousing memory and calmed herself, thinking of boring things like research documents that needed signing or experiments she had an idle curiosity about – things not exciting enough to distract her, but just plain enough to entertain her thoughts.

After an unknown amount of time Caelus spoke. ''Okay, come in.''

''You better not smell like a trash can still.'' Asta grumbled but didn't really mean it. Weird Caelus might be, but at least he understood that she didn't like him smelling like a bin.

Stepping over the small lip of the shower Asta entered it proper; pulling the glass door shut behind her and... trapping her in with Caelus. The thought made her gulp and she turned to face the Trailblazer, her cheeks only growing hotter when she got a full-frontal look at both him, and his visibly-hard erection. She pretended not to notice though and accepted the shower gel he offered, squirting some into her palm and washing herself lightly. It was made a bit awkward when she had to squeeze in with Caelus under the shower's spray though, their bodies daringly close.

Their faces were even closer. Barely a few inches apart at times Asta found herself staring into Caelus's deep yellow eyes more often than not, losing herself in them. Caelus silently did the same, the shower all but forgotten as its warm embrace poured over their shoulders and sides... until Caelus put a hand on the small of her back and pulled her close, and Asta snaked her arms around his nape, pulling him in.

Her lips met his in a kiss, deep and slow as it was. She couldn't hope to contain the groan of relief as she felt him press against her, his muscled chest pushing against her breasts as he pinned her up against the wall behind her, his right hand sliding down to her ass and grabbing it. His other hand caressed her hip, tracing the smooth curves of her body and coaxing a shallow groan from Asta.

''Caelus...'' Simply breathing his name out made her loins ache. Ache for him. ''Why don't I reward you for being such a good assistant?''

''Sounds good to me.'' He murmured against her lips, stealing another kiss.

Asta shuddered into it, drawing it out for several seconds before pulling back – but Caelus was hungry for more, capturing her lips even as she made a half-hearted moan of protest, her back arching as his fingers tickled up her spine. Then the moment the kiss broke off he darted down, taking her left nipple into his mouth and sucking on her tit passionately, eliciting a startled gasp from Asta that devolved into a husky whine of want, her thighs pushing together as if to keep her from collapsing under the weight of her budding need.

''Ah, Caelus, w-wai- ohh~'' Another nipple-suck made her loins ache more.

She almost regretted telling him her tits were sensitive. Almost.

Both of his hands came up then, groping her breasts from below and lifting them up a little for better access – his lips leaving her left nipple and swapping to her right, sucking on it and swirling his tongue around the pinkish nub. The constant motions, the curious prodding, all of it felt so good it made her head light and multiple moans spill past Asta's lips. Lips that were soon reclaimed by Caelus himself in a rougher, deeper kiss.

Asta let it go on for another few seconds before breaking off, and this time managed to wriggle free of his hold – kneeling before him instead. Caelus took note of that and backed up a half-step, his own cheeks a little warm – something that broke a cheeky, if shaky smirk to Asta's lips. Without a word she curled her dainty fingers around his thick shaft and stroked it, pumping from the base all the way up to the tip before letting her hand fall once more. The husky groan that answered her only excited her more.

''You're so erect already.'' Asta murmured, kissing the tip. ''Did watching me get undressed arouse you that much?''

''Yeah. You're beautiful like that.''

Despite being called beautiful countless times in her life, when Caelus was the one saying it somehow felt so much more embarrassing – her cheeks blazing red as she mumbled something back. In lieu of talking she peppered the tip of his dick with kisses; one smooch leading into the next until she got her tongue involved too and licked it a bunch, ignoring the water running down his dick as best she could and focusing just on making him feel good.

Something that tempted her to shift her hand down to the base, her lips to part – before at last she took the tip into her mouth.

''A-Ahh... Asta...'' Caelus breathed out, voice low and husky.

Asta loved that voice. It sent shivers through her and burned itself into her very dreams – it wasn't even a week ago that she had a wet dream of Caelus doing all sorts of things to her, only to be disappointed when she woke up in the morning to find out it wasn't real.

Banishing the thought Asta tilted her head slightly, taking more and more of his cock into her mouth until she had just over half of it between her lips; said lips pursing against his meaty cock and sucking back up to the tip. Her lips barely grazed the crown before she went back down again, eyes fluttering shut as she devoted herself solely to giving him head; every slow suck and slurp embarrassingly audible in the shower.

As was Caelus's grunts, low and husky as they were. They if anything just fuelled Asta's motions, her head gradually bobbing faster and her curled fingers pumping the base of his cock, leaving not a speck of it unattended for even a moment. Her soft lips caressed his cock between them as she pumped up-and-down it, feeling him twitch and throb in retaliation but only emboldening her to use her tongue, dragging it along the slit or swirling it around the tip, tasting pre-cum and lapping it up without complaint.

''Mmph... mmn...'' Asta dutifully kept bobbing her head, not opening her eyes even when he laid a hand on her head.

Caelus for his part could only moan in wordless bliss, his eyes locked onto Asta's determined face as she sucked him off – sensual bobs of her head carrying her from near the base all the way to the tip, the suction incredible and the hotness of her mouth purging any rational thought. The water spraying from the shower was warm on his back too, some of it bouncing off of his skin and landing on Asta herself but the researcher paid it no mind, simply continuing to suck his cock and smear her saliva into it.

Up until Asta popped her lips off of his cock, gasping in a quick breath before jerking him off hard and fast with her hand – flashing him a sensual smirk. ''Making a rich girl like me suck your dick, you're so shameless, Caelus~''

Caelus just shuddered at that, a feeble moan escaping him. Blushing heavily at the sound Asta took the tip back between her lips and sucked him off with renewed vigour, her hot slurps ringing out easily through the shower, as did Caelus's increasingly-tight moans, his cock throbbing within her mouth. Something that tempted Asta to slide her tongue under his shaft as she kept blowing him, her nose grazing his groin as she took him in deep repeatedly, almost deep-throating him had it not been for the two fingers curled at the base of his dick.

His breathing became hard and Asta released his dick altogether; grabbing his hips instead and sucking his cock devoted, nearly throating him as she went from tip-to-base-

-and then at last he came, moaning euphorically as he busted down her throat. Asta's eyes widened slightly but she swallowed it all without hesitation, shuddering as she felt his hot molten load pour down her gullet and into her stomach – every gulp carrying even more of his sticky semen down.

Seconds ticked away into blissful oblivion, the hiss of the shower and the wet gulps of Asta the only noise about – until with a wet gasp Asta pulled back. She coughed only briefly and wiped her chin dry of any spit, her gaze flickering up to Caelus. Earning a soft smile and hum from the young man himself as he petted her head.

The act made her embarrassingly happy.

''T-There.'' Asta said, feigning seriousness as she hopped to her feet. ''That should cure your... needs for a while, no?''

He didn't answer and Asta didn't give him a chance to; her cheeks a blazing red as she turned her back on him... and then bent over, palms flush against the opposing tiled wall. ''But... my needs, haven't been met yet...''

Caelus's eyes gleamed and he hummed, getting behind her. Intimately she felt his still-erect cock slap against her ass cheek before dragging down, the tip tracing a line to her nether lips and rubbing against them, pushing a soft moan out of the rich girl. She felt the bulbous tip nuzzle and kiss her opening but not enter her yet, just rubbing about in a way that might almost hint at him being unable to find the hole, if she didn't know Caelus. And she knew he was teasing her.

''Caelus...'' Asta didn't quite whine, but the sound that came out was remarkably like it.

With his lips twitching up into a small smile Caelus hummed once again, guiding his tip to her entrance – and Asta cried out as his cock finally entered her. He parted her insides, he buried himself within and ultimately stuffed her full practically on the first thrust, his groin pressing against her ass and his body almost spooning hers. The sudden fullness in her groin left Asta breathless in the best way possible, her eyes open but unseeing as she felt his thick thing inside of her, and in some way it felt right.

''Nn, Asta...'' Caelus breathed into her ear. ''You're so tight.''

''D-Don't just say tha- ah!'' Asta cried out as he suddenly pulled partway out and slammed back in. ''Hah! C-Cae- mn~!''

His thrusts were long and hard, pulling out to just the tip before burying himself back into her depths. Her loins clenched around his intruding shaft but that did little to slow him down, his grunts hot in her ear and against her nape as he pistoned into her womanhood, her petals glistening with her want as he plunged between them. With how wet she was it was no surprise he was being so rough, so hungry; his body flush against hers whenever possible.

Slowly Caelus found his rhythm, his thrusts gaining more speed – the sound of their flesh colliding filling the bathroom, coaxing another low moan out of Asta, the researcher almost dizzy from the euphoria coursing through her. Nothing compared to this. The feeling of his cock inside of her. Of his body against her own. Of his breath on her neck and his hands leaving her hips – and Asta let out another cry as he grabbed her sensitive breasts, squeezing them in his greedy hands as he sucked on her neck.

''A-Ah! Cae... Caelus...!'' Asta managed to gasp out, pushing her ass back against him.

Caelus grunted huskily into her ear and replied by thrusting into her harder, clapping her ass with every strong thrust and making her knees weak in the best way possible. Her insides tightened around his dick but he just rammed her all the more, every exhaled breath tickling her nape and neck whilst his hands busied themselves with fondling her breasts. He hefted them about and flicked her nipples, he pushed them together and kneaded them, he played with them endlessly and Asta could hardly find it in her to complain, every touch adding to the burning need in her loins.

''Hnf, oh my- ah~!'' Asta staggered from a particularly hard thrust.

Which was what Caelus wanted, she realised, cheeks aflame as he pushed her a step forwards and pinned up her against the wall. Her big tits squished against the tiles and made it a little hard to breathe but that was a small price to pay for feeling Caelus hammer her like a beast in heat, his groans taking on a more guttural, horny tone as he slotted himself into her, every thrust rapid and making stars explode behind her eyes. She raked her nails down the tiles desperately, looking for any purchase, but found nothing. Caelus's hands however found purchase on her waist, gripping it as he pounded her raw from behind, his cock sliding between her glistening petals at a feverish pace, kissing her innermost parts with every thrust.

Her breathing grew fast and her head light, making it all the harder to get the words out. ''Caelus, don't stop, please don't- ah! Yes! Oh Aeons yes!''

Skin harshly smacked and Caelus grunted in her ear, his breathing tight, strained-

-and then he slammed inside and came. Asta saw white, a shrill cry tumbling from her lips as her own orgasm hit like a ton of bricks; electric jolts lancing through her body and her mind bereft of rational thought. The only things she felt was the ironclad grip on her waist, and the molten-hot seed pouring into her depths, spurt after spurt of it filling her up like a creamy filling to a pastry.

In that sense, she was the pastry. One that Caelus didn't mind eating all night when they had some time alone.

The reminder sent hot shudders through Asta, a weak moan escaping her as she came down from cloud nine, her pussy tingling and her legs numb. Slowly she felt Caelus's cock slide out of her, leaving her insides feeling so empty she compulsively reached down and shoved two fingers inside of herself, gasping as she fingered herself, keeping that simmering bit of pleasure going. It waned fast though and fatigue made her arm slow, until with a defeated groan she pulled her fingers out altogether. Cum clung to her digits, but she just wiped it off on her leg.

''Mm... I can't even think straight now...'' Asta breathed out, peeking over her shoulder. ''Hey, we should do this agai- ah?!''

Clarity came back to Asta as she was suddenly swept off of her feet and picked up in a bridal carry, eliciting a startled yelp from the researcher herself – her cheeks blazing red as she found Caelus with a blatant want in his eyes. Without a word said the handsome Trailblazer carried her out of the shower and into the bedroom, his pace so fast she barely had the time to register the change before he tossed her onto the bed.

''Oof-!'' Asta grunted as she landed on her back, bouncing briefly. ''Caelus, y-you still wanna-''

Her throat closed up as Caelus got on the bed with her. Both were still dripping wet with water, staining the bed, but he offered not a single protest as he climbed on top of her. Submissive like prey before a predator Asta could only whimper, opening her legs and unable to deny her excitement when she saw he was still rock-hard for her, his dick-tip nuzzling her slit once, twice-

-and on the third go he plunged between her petals once more, fucking a cry out of Asta. In the back of her mind she realised she should be quiet, that people in the other rooms might hear, but any such thoughts perished the moment Caelus began to fuck her.

And 'fuck her' was really the only way to describe it. Hard, long thrusts slammed his dick up against her innermost parts, battering the gates to her womb and churning about the cum he's unloaded inside of her, causing some of it to leak out around his dick as he pistoned in-and-out of her. The only mercy she got was that his lips mashed against her own, devouring her voice and leaving Asta able only to clutch onto his back, her nails pricking his skin as she held on tight.

''Hyah~! C-Cae- mnyaah~!''

In the room right next door, March 7th would listen in with burning red cheeks and her ear flush to the wall, eyes wide as she soaked in every little sound that passed through the thick walls. The squeaking of the bed, the harsh thud of the headboard, the shrill cries of Asta – and the husky groans of Caelus. All of which contributed to a hand going under her skirt, her teeth sinking into her bottom lip as she caressed herself, her exploratory touch igniting a needy heat in her loins.

Unaware of their listener Asta clawed at Caelus's back, arching her own as she felt his cock hit a sweet spot – sending an explosion through her loins, so intense and electric she nearly came from the feeling alone. Caelus must've noticed as he earnestly aimed for that one spot, grunting heavily as she slammed into her tight depths and soon darted down, crashing his lips against her own in a deep, passionate kiss.

''Haah~!'' Asta broke the kiss off first and threw her head back into the pillows – crying out when he went for her neck, kissing and biting it. ''Cae- mnph~!''

She clasped a hand over her mouth in some desperate bid to silence herself. It didn't really work; her voice filling the room nonetheless as he slammed into her again and again, his cock parting her insides and kissing her depths, leaving her so hot and achy that she wanted to feel like this forever, just dangling on the precipice of climax. For better or worse though the end rapidly neared, her insides seizing around his pulsating cock and only making it feel so much more intense, the friction making her toes curl and her breath catch in her throat.

''Asta-!'' Caelus called her name.

And then Asta came. Screaming, raking her nails along his back, she had the single most intense orgasm of her life – one pushed to greater heights as she felt him slam inside and burst within her, spurts and splatters of his love pouring into her in an unending torrent. She squeezed all of it out of him, her legs spread wide apart and her heels digging into the sheets, taut as she milked her lover for all of his warmth.

A small eternity passed, muscles grew tight – and then with an explosive moan Asta collapsed back against the bed, limp. Caelus fell atop her with a similar groan, his head in the crook of her neck and his body pressing down on her own, but in that moment Asta just found his weight comforting.

Shifting to get more comfortable Asta just wrapped her arms around him more gently and held him, feeling him throb and twitch within her. ''Mm... there's so much... we'll need to shower again now, you know...?''

Caelus hummed.

''...you knew that, didn't you?''

Another, more self-satisfied hum.

''...you dork.'' Asta sighed, petting his head. ''Give me ten minutes, I don't think I can even stand at this rate.''

Caelus hummed gently, kissing her neck and sending a shiver up her spine. ''Ah, wait, I didn't- o-ohh~''

Though he gave her a rest from his cock, he certainly didn't give Asta rest from his hands and lips – both of which continued to tease and touch her for the next ten minutes.

All whilst March 7th listened in, panting heavily and with soaked underwear, her own legs trembling from the force of her first climax.

''Y-You two... are too loud...''

[END]