Work Text:
Changbin waves his dad off when he tells him to be careful, and to return to the ship before sundown.
On their trade route to Singapore, they've stopped on a remote little island of white sand and palm trees, to stock up on drinking water and supplies his father had buried the last time he was here, to have a rest stop for long voyages like this. Changbin could probably round the whole island in a little less than a day, and he's eager to do so. Endlessly curious about the world around him he walks along the beach, the sea breeze ruffling his curly hair, notebook and pencils in his leather bag. He slips a particularly beautiful, rosy-red seashell into it to send it with the next letter to his fiancée back home. Maybe she can make a beautiful necklace out of it.
The beach suddenly gets interrupted by steep sand rock, formed by millennia of waves crashing against the edges, rounding them out. Changbin is just about to plan his route around it when he notices that the rock is hollowed out, the entrance of a cave. There might be just enough flat rocks in the water to use as stepping stones to go inside and explore.
The rocks are slippery, but Changbin manages. Step by step he makes his way to the gaping maw of the cave. He can only see so far into it before the path is shrouded in darkness, but Changbin's curiosity is bigger than his fear. He just wants to check the current position of the sun in the sky one last time when he turns around and is suddenly startled by someone being there.
Perched atop a rock, waves crashing around them, they're watching him curiously. A human, Changbin thinks, and then immediately doubts himself. They have the anatomy of a human as far as he can tell, two eyes, two ears, nose and lips, a neck and a torso and two arms with a hand and five fingers on each, but Changbin has never seen a human like this. Blue-tinted, pale skin that looks sickly against the sunlight, while their fingers are as black as their hair, as if they dipped them in coal. Strong nose, full lips and round eyes that look neither distinctly male or female. Their muscular torso is adorned with a variety of mismatched trinkets; necklaces of tarnished silver and gold in varying lengths with chipped pearls and cloudy gemstones. An amulet that would look outdated even on Changbin's grandmother. A pearl earring in one earlobe and in the other a naked hook, missing the gemstone it once held. Draped around their broad shoulders like a shawl a piece of black gauze, its ends drifting in the ripples of the water around them like black algae.
Changbin's heart leaps into his throat as they stare at each other, neither of them moving.
"H-hello," Changbin tries.
The corners of their mouth lift into a soft, closed-mouthed smile. "Hello."
Their melodic voice sends a shiver down Changbin's spine. "How… how long have you been there?"
"There?" They tilt their head to the side. "What do you mean, there?"
They speak perfectly fine, and yet it doesn't sound quite right. The way they stretch their vowels, the intonation of their sentences. Like they have something in their mouth that makes it difficult to talk.
"Behind me." Changbin frowns. "I didn't see you before."
"Well, you're in my home." Their smile gains an amused edge.
Changbin takes a confused look around. There's nothing here except for the lonely beach and the sea. "Your home… the cave?"
"The cave, yes."
"Oh," Changbin replies nervously. Nothing good has ever come of intruding another creature's home. "I didn't… I didn't know. I'll go. Sorry."
Just as he carefully balances his step on a neighboring rock, the person (creature?) moves suddenly and swiftly, gliding through the water with a speed and elegance Changbin has never seen a human swim with before, and within the blink of an eye they're propping themselves up on the rock he's currently standing on. Changbin immediately stumbles back, hand snapping towards the dagger on his belt. Even up close, he can't see their lower body in the dark water.
"I didn't say I don't appreciate visitors." A dimple pops on their right cheek as their smile deepens, but their lips remain closed.
"Don't you want to come out of the water?"
"No," they answer with a playful tilt to their voice. "I prefer being in the water much more than being on land."
"But doesn't it get cold after a while?"
"I don't get cold very easily."
Changbin's grip tightens around the handle of his dagger as he swallows his own heartbeat. He shouldn't stay, but he can't stop staring at their eyes. Coal black as their hair and fingers, except for a stark, light blue ring around their iris. Changbin has never seen eyes like this.
"Your fingers…"
"What's with them?" they ask, holding them in front of their face, wondering what Changbin finds so fascinating about them.
"They're black."
"They are." Their eyes connect again, and the thrill of it trips Changbin's heart.
"Are they… painted?" Changbin knows that some cultures dye their skin with crushed up plant pigment.
"No. They're just like that," they reply. "Do you want to hold them?"
Changbin isn't dumb. He knows that his hand shouldn't leave his dagger and that he really shouldn't give it to this strange creature to trap him or drag him under.
But Changbin is nothing if not dead curious, and vulnerable to the lull of their voice and their enchanting eyes. It's like a spell is leading him to bend down and reach for their fingers despite better judgment. They're remarkably not as wet as Changbin thought they would be, and their skin feels odd. Rough and thick like water would pearl right off of it, and—
"You're cold," Changbin whispers. "Like the sea."
"You're warm." Somehow, they manage to rise further out of the water as their black fingers thread together with Changbin's. "Like the sun."
Changbin swallows, kneeling before the creature without even realizing, eye to eye. Their skin feels smooth when he strokes downwards, but rough when he strokes upwards, something Changbin has only ever felt on certain fish species. Can humans develop fish skin if they're spending enough time in the water?
"Do you… do you have a name?" he asks.
"Why wouldn't I?" Their eyes glint mirthfully, and Changbin suddenly feels stupid for asking like that. "My name is Chan."
"Chan," Changbin repeats, but he can't quite imitate the melody of it. His gaze falls down to their chest, past their intertwined hands, quickly tearing it away when he catches himself. "Are you… are you a man or a woman?"
Chan's smile turns patronizing, like Changbin asked something really childish. "We don't have a concept like that."
Changbin frowns confused. "We…?"
"Do you have a name?"
"Changbin."
"Changbin," Chan repeats his name, and makes it sound like a beautiful song. "Pretty name for a pretty boy."
"I… you…" Changbin stutters and flushes deeply. He should rip his hand away, he should say that a… non-girl can't flirt with him like that, he should say that he has a fiancée waiting at home. His eyes flicker downwards again. "Why do you have this?"
"This?" Chan's fingers brush along the edges of the black gauze against their pale shoulder. Their chest looks like it could belong either to a flat-chested woman or a man with well-trained pecs. Changbin is unable to tell either way. "Because it's pretty. Is it not?"
Changbin is so, so dizzy. His hand is starting to match the coldness of Chan's.
"You are. I mean—" Changbin gulps.
The corners of Chan's mouth twitch, and the purse of their lips is the closest they've gotten so far to flashing their teeth.
"What do you have in your bag?" They don't break eye contact as they ask.
Changbin's fingers curl instinctively around the leather of his cross-body bag. "Maps. My notebook. Pencils."
"To draw?"
"And write."
"What do you write about?" They curiously blink up at him with their captivating eyes.
"Everything. The world around me," Changbin explains. "Flora, Fauna, the sea, the tides, the winds."
"Are you an explorer?" Chan asks.
"Something like that," Changbin feels compelled to lie, because I just follow my merchant daddy around on his trade routes doesn't sound quite as impressive.
"Did you come here to explore my cave?"
"Yes."
"I can show you." Somehow, Chan is coming closer and closer, or maybe Changbin is leaning further and further down, until the tips of their noses brush together, sea-cold and sun-warm. Chan smells like salt and algae, like ocean waves and the winds that carried him here. Their fingers curl around his face.
Changbin isn't dumb—except in the one moment it's pivotal.
Chan's lips are as cold as the sea they pull Changbin into. Saltwater burns in his lungs when he gasps reflexively, holding onto Chan for dear life as they dive with him at dizzying speed. Changbin doesn't know in which direction they're going, and with his ears popping painfully from the sudden pressure change, he finally comes to the sobering realization that Chan will probably drown or eat him, or both. Changbin can't even find it in himself to be angry at anyone except himself after he's handed himself over so freely and willingly, blinded by his own foolishness and a pretty face.
Just as Changbin is about to lose consciousness do they break through the water. He coughs and gasps for air, shivering in Chan's tight hold. Before he can orient himself Chan carefully sets him down on solid ground, and he suddenly feels sand between his fingers. Changbin blinks the saltwater out of his eyes and finds himself in the round belly of the cave.
It's not dark; when Changbin lifts his head, he sees the bright blue sky through a large hole in the ceiling. Sunlight warms the sandbank Changbin is sitting on in the middle of an underground lake. It's evident that someone lives here; the sand patterned, wooden crates stacked in the shadows. His eyes snap back to Chan between his legs, curiously watching him, the lower half of their body still submerged in water.
"You… I thought you were gonna kill me," he heaves, voice grated with salt.
Chan smiles again, clearly amused. "And you were going to let me?" A statement sung like a question.
"You… you hexed me!" It's decidedly a very dumb idea to pick a fight with the creature who holds his life in their hands, but the belated panic makes Changbin irrational. "With your siren magic."
For the first time, Chan laughs, and Changbin catches a quick glance at the edges of white teeth behind their lips.
"I'm no more magic than you are, pretty boy," Chan giggles, black hands creeping up Changbin's wet pant legs. "I guess you just really like me."
All protest gets stuck in Changbin's throat as Chan somewhat glides on top of him until they're face to face again. He thinks about running, but where to? He's trapped in a cave with Chan as the only one who knows the way out.
"Are you going to eat me?"
"No." Chan grins and finally flashes the full row of their white, pointy teeth, their cool hand coming to lie on Changbin's naked chest where his linen shirt falls open and his heart knocks frantically against his ribcage. "Although I'm sure you'd be tasty."
Chan's eyes fall to his lips, and Changbin gulps helplessly. Even Chan's monstrous parts don't take away from their beauty, and he can't imagine anything scarier than that.
"You're so warm…" Chan sighs against his lips, cold hands exploring the naked skin under his shirt, eating up his body heat. "And soft. You're going to be the perfect mate."
"Mate?" Changbin squeaks pitifully, gripping Chan's shoulders tightly as if he'd have a chance against them. "I… I can't! I have a fiancée!"
"Poor thing…" Chan sing-songs in a way that doesn't sound empathetic at all. "I'm sure she will miss you greatly."
Like before, Changbin can't offer up any resistance as soon as Chan puts their lips on him, and he refuses to accept any other possibility that doesn't involve him being put under a spell of some kind. There's no way on earth that Chan just looks like that, tastes like that, feels like that. Their lips are soft and pillowy as they nudge his mouth open, and their cool hands squeezing his hips and belly paradoxically fire up his body even more.
"Ouch!" Changbin yelps when something sharp suddenly slices his lip open and he tastes blood.
"Sorry, I apologize," Chan murmurs, licking the blood off of his lip and the front row of his teeth with their rough tongue that reminds Changbin of a cat's. "Oh, you do taste good…"
Changbin whimpers helplessly and flinches when he suddenly feels something cold and wet creep up his legs. When he looks down and sees that they're tentacles, as coal black as Chan's fingers and hair, he finally makes an effort to scramble away.
"Don't go…" Chan whines and pouts innocently. The tentacles tighten around Changbin's ankles and effortlessly pull him back under Chan. Changbin can feel the water of the lake lap at his thighs. "Don't be scared, I will be careful with you. My arms will bring you great pleasure, I promise."
"Your—" Changbin squirms, and the tentacles slithering under his trousers, tickling the sensitive insides of his thighs shouldn't pull blood into his cock, but they do. "What are you?"
"I don't think your kind has a name for me specifically," Chan muses, thumb brushing over Changbin's cheek. "You called me a siren earlier, but I don't think this is what you imagined, is it?"
All Changbin can say to that is dumbly shaking his head. No, he doesn't believe that he could've ever imagined something like Chan.
Their tentacles impatiently rebel against the confines of his pants.
"These are annoying…" Chan frowns, and the tentacles suddenly try to rip through the fabric with force.
"Wait, stop, no!" Changbin's hand curls around one of the limbs in his trousers, panicked. "I need these, I… they help me stay warm."
Chan looks at him with their black eyes that somehow seem to have gotten even bigger, and Changbin irrationally fears he might be falling into them. Slowly, Chan retracts their tentacles. Changbin's fingers tremble when he unfastens the buckle and peels the wet fabric from his skin under Chan's blazing gaze. Their tentacles are back as soon as Changbin puts his pants and shoes aside, not waiting until he has removed his shirt and bag too. For a split second, Changbin grieves his drenched notebook before Chan's lips on his neck steal his attention again.
“Pretty,” they hum, shamelessly groping his pecs. “Pretty and warm and supple, so perfect.”
Changbin doesn’t know what to do with himself, boneless and helpless under Chan’s touch. He was never touched like this—tentacles aside. No woman has ever squeezed his chest, or licked his nipples, or pulled his legs apart like Chan’s tentacles do right now.
“Hmm…” Chan licks their lips looking him over like a meal—Changbin still doesn't trust their promise not to eat him. His cock is embarrassingly hard, and Changbin has half a mind to cover himself. But before he can get to it he throws his head back with a shockingly loud moan, arching his back when a tentacle sneaks around his dick.
“Cute,” Chan whispers, endearment in their eyes as the end of the tentacles plays with Changbin’s foreskin.
“Don’t say that!” Changbin whines, clawing at Chan’s skin without leaving even the slightest irritation.
“Why not?” Chan pouts again.
“It’s average!” Changbin whimpers just before losing total control over his body when the tentacle muscles flex rhythmically over his cock like ripples through water.
“What does that mean?” Chan asks curiously, but Changbin's only answer for them is another moan when the tentacle curiously prods at his slit.
"Sorry, they really have a mind of their own," Chan giggles.
"Wha—" Before Changbin can ask what the hell that means, he feels another tentacle nudge at his rim, panic lurching in his chest. "Wait—"
But the tip already wiggles inside, and Changbin is going cross-eyed. No one has ever—
"You feel good," Chan moans with their beautiful, melodic voice against his lips, placating him with another kiss.
So many foreign sensations crash down on Changbin at once that he can't do anything except squirming helplessly and maybe catch a breath between desperate hiccups of moans and whines. Chan squeezes his pecs and licks his nipples with their cool, rough tongue, setting off what Changbin only can describe as firecrackers in his chest while tentacles are tightly roped around each of his legs to keep them apart. Meanwhile another one is squeezing his cock like it's trying to milk him, and another twists in his hole like it's looking for something.
"Oh, you're sensitive here," Chan remarks delighted when their tentacle nudges against a spot inside Changbin that makes him tear up from how mind-numbingly pleasurable it is.
Again, the tentacle presses against that same spot, pointedly this time, and Changbin's whole body cramps and flails. He swears he blacks out for a moment, because the next time he blinks his eyes open, he's heaving like he just came up from underwater, and Chan is curiously eyeing the streaks of white sperm on Changbin's tummy.
"What's that?" they ask, running their fingers through it. Changbin only watches, still trying to catch his breath and praying for the world to stop spinning. They rub his cum between their fingertips, and then their tongue darts out to taste it.
"Hmmm~" Chan hums, sticking their fingers into their mouth to eat it all before lowering themselves to lick the rest straight off his belly. "This tastes different than your blood, saltier… but still divine," they explain, as if Changbin was waiting for their verdict of how they like the taste of his release.
Chan's rough tongue tickles a little on Changbin's sensitive skin, and he tightly grips onto their hair as they descend further downwards. The tentacle in his ass still ventures deeper, stretching him wider, cool but gradually warming up with his body heat, seemingly oozing slick because Changbin has no other explanation on why the glide would be so easy.
He startles when he suddenly feels Chan's tongue flick over the tip of his spent dick. "Not there, I—"
"Sensitive," Chan hums with a cheeky grin, still nuzzling his nose against his soft cock, nipping and kissing like he can't get enough. "I know."
"Careful with your teeth, and your—your tongue," Changbin just manages to moan before he feels more tentacles snake over his ribs and up to his chest, its suction cups latching onto his nipples.
"I promise."
Changbin would blush from how intently Chan is looking between his legs if his blood didn't rush into other parts of his body.
"Precious little thing," Chan coos, thumb caressing Changbin's stretched rim. "You're taking the stretch so well. You'll be ready soon."
"What? For what?" Changbin gasps anxiously, but Chan just smiles and comes up again to pull him into another kiss, and their tentacle pushes deeper into him, stretching him mercilessly. It aches, but despite coming already Changbin's whole body still feels strung tight like a bow, still on edge, still responsive to the tentacles sucking on his chest and persistently pressing inside him, and Chan diving deep into his mouth, their tongue almost reaching the back of his throat.
"So many wonderful flavors on you." Chan licks up the sweat on Changbin's neck too, savoring it on their tongue like the finest wine. "I could taste you for all eternity."
Something must be vitally wrong about Changbin that he feels utterly flattered by this. No one has ever desired him like this before. Chan cradles him in their strong arms as if he doesn't weigh anything at all and Changbin's heart flutters wildly from how protected he feels—another symptom of his madness. Feeling protected in the arms of the predator. Maybe there's venom in their spit that makes him receptive and compliant with every kiss, maybe—
"Can't wait any longer pretty boy, I'm sorry," Chan groans into his skin as if they're actually fighting demons.
Changbin whines when the tentacle slowly pulls out of him, leaving him horrifyingly open and gaping. He looks down to see yet another tentacle emerging from Chan's octopus-half that looks distinctly different from the others. Shorter, thicker and rosy pink instead of inky black. It impatiently worms into him, and Changbin moans when it mercilessly presses against that same spot again that zaps through his whole body and makes his spent cock twitch.
"So good, you feel so good…" Chan moans, feverishly kissing, licking, nipping at his skin, rocking on top of him and thrusting into him again and again. "Making me feel so good, never felt anything better… I'll never let you go, pretty little thing."
Changbin barely gets to process Chan's mumbling before another tentacle sneaks past his lips uninvited, going so far down his throat he has to gag.
"Careful," Chan chastises as if they're scolding a little child, tugging on the tentacle so it doesn't sneak so deep into Changbin's throat. "Be gentle with him, we want to keep him for a long time."
Changbin garbles nonsense around the tentacle in his mouth that's nudging and playing with his tongue, rocking steadily in Chan's arms with their thrusts. Cock chubbing up again, still wrapped by a tentacle that prods so insistently at his slit as if it wants to crawl inside, and then it does. Changbin doesn't even know how on earth it would fit, and even if his vision was free from tears of overstimulation he doesn't know if he would have the stomach to look down and see for himself.
"Coming, it's coming, ahh—" Chan whines into his neck, eyes glossing over. Before Changbin can ask what the hell he means, or rather garble around the tentacle that's still assaulting his mouth, he feels it. Something big is pressing against his hole that's already stretched so wide. Changbin writhes helplessly, but Chan's grip and their tentacles tighten around him until he can barely move at all. Panicked, he accidentally bites down on the tentacle in his mouth, but that doesn't seem to deter it in any way. It seems like Changbin didn't even pierce its skin. It tastes like the sea and fishy slick like before.
"Shh, just a little bit—hhhnnggggahh—" Chan kisses his cheek before a guttural moan escapes them, and Changbin feels like he's about to black out again when he feels The Big Thing being pushed into him. Once it's past a certain threshold, his body accepts it easily.
"Look at your bulging belly," Chan says, voice dripping with lust and awe, petting the distention of Changbin's lower tummy. "Gonna breed you so full, make you a mommy."
Breed?! is what Changbin wants to yell, but all he gets out between the tentacle in his mouth and the whiny moan tumbling out of his throat at yet another Big Thing pressing into him is a garbled, undecipherable yelp of horny terror. His body accepts it much easier this time, and what is even more terrifying is that it's not entirely unpleasant either. Changbin's cock pulses in its tentacle confinement, and he would leak from the tip all over the place if the tentacle didn't plug him up. Hell, what if he comes again but Chan's tentacles don't let him come?!
"There you go," Chan sighs a relieved sigh, kissing his lips stretched around their tentacle. "Taking it so well, only one more."
"On'ore?!" Changbin squeals, but it's already straining his rim. Changbin cries, sobs as it's inching its way deeper and deeper into him, pushing and pushing and pushing—and then his eyes roll into the back of his head and he's coming again, squirting out clear fluid as soon as the tentacle thankfully pulls out of his urethra. By the time It settled deep inside him with the rest of Them, Changbin is whimpering and shivering from overstimulation.
"Thank you, thank you," Chan chants, tentacles slowly retracting as they're peppering kisses all over his face, licking up the tears Changbin didn't realize he shed. "Good, so good, you did so well. They're warm and safe now."
Changbin groans when the tentacle that was buried in his hole slips out completely, the emptiness it leaves him with suddenly aching. He has no strength left to resist when Chan pulls him halfway into the water again, tentacles and hands tenderly caressing his body to clean him up.
"What… what the hell just happened?!" Changbin gasps as soon as he finds his speech again, Chan's tentacle slick still sticky in his mouth.
"Can't you feel it?" Chan pets his belly that's still distorted, swollen, as if Changbin were bloated from a heavy meal. "Filled you up."
"Filled me up with what?!" Changbin anxiously asks.
"My eggs." Chan smiles serenely at him. Proud. "My babies."
Changbin is getting so dizzy and nauseous he fears he's about to faint like a damsel in distress.
"Don't look so frightened," Chan chuckles, and if there would've been any strength left in him, Changbin might've slapped his beautiful face. "You're my mate now, pregnant with my babies. I'll take good care of you."
"But… I'm a man," Changbin tries to argue as Chan carefully sets him down on the sand bank again. "Men can't be pregnant."
Chan only shakes their head with a soft smile. "You humans are so narrow-minded sometimes. Even with my eggs bulging your belly, you still won't believe the obvious just because it's going against what you previously accepted as the truth?"
Changbin's head is pulsing painfully as he's trying to wrap his mind around everything that just happened. Chan fucked him, knocked him up… does that make Changbin a woman?!
"You're cold," Chan notes, and only then does Changbin realize that he's shivering. "Go lie down, soak up the last light of the day, my sun-warm boy."
Changbin looks up. The orange hue of the light tells him that it's the late afternoon, and soon it will be dark and cold. Is his dad already worrying about when he will return? Will he ever return?
"Chan… I need to go back to the ship. My dad is probably worried sick about me."
"You're carrying my babies now, my love… I can't let you go," Chan says it like he's truly apologetic. Like he cares. "I'm sorry."
Even if Chan isn't honest about his apology, there's nothing Changbin can do about it anyway. He's trapped in a cave, in his home. With his… eggs. Babies.
"Chan… I'm gonna be cold. I need a fire, and a blanket. And I need drinking water, and food, and…"
"Don't worry about it," Chan smiles as charming as ever. Changbin wishes it wouldn't make his heart flutter. "I will get you everything. Just rest for now, my pretty boy."
Chan rises out of the water to give Changbin a good-bye kiss on the lips, and with another splash, they're gone.
Changbin lays out his clothes and his wet notebook in the last sunlight of the day to dry before lying down in the warm sand himself. Closing his eyes with a hand on his rounded belly, he hopes that Chan will keep their promise of taking care of him.
"Shh, it's just me," Chan whispers when Changbin startles awake in the darkness, feeling their hands on him again. As if Changbin isn't also still skeptical of Chan.
But Chan only wraps him tightly in a warm blanket. "Where did you get this? How did you get it here dry?"
"From the ship," Chan replies, uncaps and tips a bottle of water to Changbin's lips for him to drink. "I transported it in a wax-sealed crate."
The cool water pleasantly soothes Changbin's sore throat. "Did anyone see you?"
"I don't think so." Chan closes the water bottle again to put it away. Their movements seem so sure even in darkness, Changbin wonders how much better their night vision must be compared to his. "I can be pretty sneaky, as you know."
"Wait, what—" he yelps when Chan suddenly tugs the blanket cocoon he's wrapped in over the sand. "Don't throw me back into the water!"
"I'm not, I promise," Chan chuckles, but Changbin hears the water splash right beside him, so they must be right on the edge of the sandbank.
"Want to have you close to me," Chan explains when they're satisfied with Changbin's position. Water ripples as they lay down beside him, Changbin assumes with their lower octopus-half in the water.
"Want to hold you." Chan snakes an arm under Changbin's head and nuzzles into his neck. "You're mine now. My sun."