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n1ght0f-nyx · 3 months ago

Note

Hihi!

I just read your rules, so I hope this request follows them:

Could I request an leviathan!merman x fem reader? I'm not super picky about the details of his appearance, so you can have fun with that.

I'm thinking, maybe, reader is prisoner on a pirate ship and leviathan!merman attacks and sinks the ship because it constantly disturbs the water of his territory. He finds reader, realizes he almost killed an innocent captive, and shenanigans ensue from there. He takes her home with him to take care of her while she recovers from the imprisionment/his attack since it's too far to safely take her back to shore, much less a shore she knows. His underwater cave has an airpocket/above-sea level entrance as well as the main entrance; how lucky and convenient, amirite?😅

Maybe he's slightly awkward and it makes him seem detached and scary...

I'm hoping for fluffy with a smidgen of spice or smut at the end?

Thank you in advance if you decide to write this!🫶

holy shit this was insane i love you

merman x fem! reader fluff and smut

warnings/tags- short smut peice at the end, fem reader, monster x human, mentions of imprisonment, i gave him a name at the end

word count- 3727 words (im tired)

The salt-laden air was suffocating. The relentless waves rocked the creaking pirate ship as it cut through the waters, a prison you couldn't escape. Days had passed since your capture, and you were bruised, sore, and tired from the confinement. The crew barely acknowledged your existence beyond the scraps of food they tossed your way. They were focused on something else, something beyond the horizon that kept them nervous and on edge.

One of the older pirates muttered about a sea demon—a creature that hunted ships around these waters. You thought it was nothing more than sailors’ superstition, but as the air turned heavy and the sea became unnaturally still, an eerie sensation crawled down your spine. The crew became frantic. Eyes darted toward the water, watching for something. You couldn’t tell what.

It happened fast. The once-still water erupted into chaos, and the ship shuddered violently as if something enormous had collided with it. Men screamed weapons were drawn, but none of it mattered. The sea itself had risen against them. Waves higher than any you'd ever seen crashed down, tearing the ship apart. You were thrown across the deck, striking the mast hard, the air rushing out of your lungs as darkness claimed you.

---

When you awoke, the world felt different. The coldness of the water had soaked through every part of you, the sensation both numbing and alarming. You blinked, trying to focus on your surroundings, but nothing made sense. The sea still roared, but you weren’t drowning.

You were… floating? Treading?

Something—or someone—had you in its grasp. Panic surged through you, and you tried to twist away, only for the grip around you to tighten, keeping you still. Then you felt it—scales. The slick, cool texture brushed against your skin as a powerful tail swam you through the water with ease. You struggled, coughing up saltwater, your limbs heavy and useless.

A voice, deep and foreign, hummed in the water. “Don’t… fight.” The words were broken but clearer than you expected. You tried to crane your neck, to see what held you, but before you could make sense of the situation, you were lifted above the water.

The night sky greeted you once more, stars shimmering against the black ocean. But it wasn’t the stars that took your breath away. As your vision focused, you were pulled into the shallow confines of a cavern. Rock formations loomed above, sharp and jagged, and the faint glow of bioluminescent algae clung to the cave walls, casting an ethereal light across the scene.

Then you saw him.

The creature holding you was enormous. His upper body was humanoid but covered in dewy scales, glistening under the faint light. His skin was a mix, inky gunmetal grey and Cerulean blue, blending with the shadows and the sea. The scales grew rougher around his neck and joints, trailing down to the massive tail that curved behind him. His eyes, glowing with an eerie gold hue, met yours, unblinking and intense.

A sea-creature.

The pirate tales weren’t lies.

He moved carefully, setting you down on a small ledge that jutted out of the water inside the cave. You coughed again, your body shaking as the cold air hit your wet skin. For a moment, the creature just stared at you, his eyes scanning over your form with something you couldn’t place. Was it curiosity? Guilt? You weren’t sure, but it wasn’t the mindless aggression you'd expected from the stories.

"Pretty… girl," he whispered, the words hesitant as his voice echoed in the cavern.

Your heart pounded in your chest, fear mixing with confusion. Why had he saved you? Had he been the one to destroy the ship? The silence between you stretched on, uncomfortable and thick. You opened your mouth to speak but hesitated, unsure if you wanted to know the answer to your questions.

He shifted awkwardly, his long tail curling into itself as if he wasn’t sure what to do next. The leviathan’s hands, large and clawed, flexed as he tried to mimic human gestures. He brought one to his chest as if trying to calm you. His voice was gruff and halting. “Hurt..?”

You swallowed, trying to find your voice. "I... I was a prisoner."

The leviathan frowned, his expression twisting as if he was processing your words. He pointed to himself. "I… destroy..Save you." he spoke blankly

Your mind reeled. He had attacked the ship. He had killed everyone on board—pirates, yes, but also human beings. And yet here he was, trying to help you. There was no malice in his expression, only an awkward uncertainty, like he wasn't used to interacting with anyone, let alone a human.

“I…” You stammered, feeling small under his gaze. “Why?”

His head tilted, brow furrowing. He seemed to struggle with the question, trying to find the words. "Innocent," he finally murmured. "No kill… innocent."

You wanted to believe him. But trust didn’t come easily when you’d just been ripped from one terrifying situation and thrown into another. “You killed them all,” you whispered, your voice shaking.

The leviathan’s eyes darkened, his tail thrashing slightly in the water, sending ripples across the surface. “They… disturbed…” His hand clenched into a fist before he loosened it again, trying to maintain his composure. “This… my home. They hurt… water. Hurt… sea.”

You blinked, processing his words. He was a protector of these waters, not a mindless monster. He had been defending his territory. The pirates had angered him and threatened his home. And in his attempt to drive them away, he had nearly taken you with them.

“I didn’t mean to be there,” you said, your voice softer now. “They captured me.”

He nodded slowly, his golden eyes never leaving yours. There was a strange kind of innocence to him despite his monstrous appearance, like he was trying to understand, trying to make sense of the situation as much as you were. “I… care for you. You are safe… here.”

You looked around the cave, the glow from the algae creating an otherworldly atmosphere. The air pocket allowed you to breathe, and while the water was cold, the rock beneath you was dry. For now, you were safe.

But how long would you be here? How far from the land were you? Your thoughts spiralled, and before you could stop yourself, tears pricked at the corners of your eyes. You were stranded in an underwater cave with a creature who had just destroyed an entire ship, and you had no idea what would happen next.

Seeing your distress, the leviathan made a low sound, a soft chirping noise that seemed almost out of place for something his size. He inched closer, his movements slow and deliberate as if trying not to scare you. “Safe… now,” he repeated, his voice almost a whisper.

Your body trembled, a mix of cold and exhaustion taking over, and you felt yourself teetering on the edge of unconsciousness. You were too weak to respond, and as your vision blurred, you caught a final glimpse of the leviathan’s concerned gaze.

“Rest,” he murmured, his deep voice the last thing you heard before the darkness took you once more.

---

You weren’t sure how much time had passed when you awoke again. The cave was still, the water lapping gently at the edges of the rocks. Your body ached, but the sharp pains from earlier had dulled to a manageable throb. As you stirred, you noticed the leviathan watching you from the water, his upper body resting on the edge of the ledge.

“You… awake,” he said, a hint of relief in his tone.

You pushed yourself up slowly, wincing as your muscles protested. “Yeah,” you muttered, rubbing your forehead. “I’m awake.”

The leviathan studied you for a moment before shifting his weight and submerging partway into the water again. “No go… back to land,” he said, his voice low but clearer than before. “Too far. Too… dangerous.”

You frowned. “Then what do I do? Just… stay here?”

He looked almost embarrassed, his golden eyes darting away from yours. “For now. I… help. You stay safe.”

It wasn’t an ideal solution, but what choice did you have? You were miles from land, and even if you could swim back, there was no guarantee you’d survive the journey.

As the days passed, the initial fear that had consumed you began to ebb away, replaced by something you couldn’t quite define. The leviathan, whom you had come to think of simply as "him," seemed to be doing everything in his power to make you feel safe. Every day, he brought you food from the sea—fish, clams, seaweed—arranging it in neat little piles on the dry ledge of the cave where you rested. It wasn’t long before you stopped seeing him as a monster. He had saved you, after all. And there was a gentleness in his awkwardness, an effort to communicate that made you feel like you weren’t just some stranded victim in a strange land.

He never wandered too far, always returning with something new—a small collection of smooth stones, intricately shaped shells, and occasionally, bones that had been bleached by the ocean. He would lay them down carefully in front of you, watching for your reaction with bright, expectant eyes. At first, you didn’t think much of it. He was probably just offering you things he thought might interest a human, but you noticed that he always seemed delighted when you picked them up, inspecting each one closely.

You had begun making a habit of it—admiring the shells, thanking him for the smooth, polished stones. His face would light up in a way you’d never seen before, his golden eyes flashing with that strange, bioluminescent glow that was becoming more familiar to you.

And it wasn’t just his gifts. His body language had started to shift in subtle ways. When he emerged from the water, the faint freckles along his face and shoulders glowed softly, but when you spoke to him or even smiled in his direction, they would brighten, casting more light into the dim cave. At first, you assumed it was a natural response to his emotions—perhaps a way for his kind to communicate. But then came the sounds. He chirped. He hummed. He made these low, rumbling noises deep in his chest that reverberated through the cave walls.

It was strange—almost endearing.

One day, after he had brought you a particularly beautiful shell—spiralled and iridescent—you smiled at him, running your fingers over its smooth surface. “It’s beautiful,” you said softly. “Thank you.”

The leviathan’s face lit up, his freckles flaring into an almost blinding brightness as he chirped happily. You chuckled, placing the shell in the small pile of treasures you had started keeping at your side.

“Do you have a name?” you asked him, curious if he could understand more complex language. “I mean… what should I call you?”

He blinked, his head tilting slightly. “Name…?” His voice was still halting, but he was getting better, and more confident with his words. “No… name.”

“Hmm.” You bit your lip, thinking. “Maybe I’ll give you one, then.”

His eyes widened slightly, glowing with interest.

You tapped a finger against your chin, trying to come up with something that suited him. Something powerful, but also kind. “How about... Kai? It means sea in a few languages.”

“Kai…” he repeated as if testing the word. Then, his face broke into a small smile, the glowing freckles on his cheeks pulsing rhythmically. “Kai… like.”

You couldn’t help but smile back. “Good. Kai it is.”

The days continued like this, with him bringing you more gifts and making those strange chirping noises whenever you accepted them. Sometimes he would linger nearby, watching you with a strange intensity that should have been unnerving but wasn’t. It was almost… sweet.

One evening, after he had brought you a particularly smooth stone—a dark, deep blue colour—you held it up to the faint light. “You have quite the eye for pretty things,” you said teasingly, glancing at him. His golden eyes glinted, and he made that low, rumbling hum again, the sound resonating in your chest.

You didn’t know when it started to happen, but somewhere along the way, you had stopped seeing him as just a creature of the deep. There was a tenderness in him, a genuine care for your well-being that warmed you in ways you hadn’t expected. He wasn’t just keeping you alive. He was trying to make you happy. And it was working.

You caught yourself watching him more often—how his muscles shifted beneath his dark, glistening skin, how his tail curled and flicked in the water when he was excited, how his glowing freckles pulsed in response to your laughter. And when he brought you something new, when he chirped at you or hummed softly, it made your heart race in a way that had nothing to do with fear.

---

Kai didn’t fully understand it at first, but something had changed between the two of you. He could feel it. Every time you smiled at him or touched the gifts he brought you, something warm and bright filled his chest. It was more than happiness. It was... connection.

He had been practising the small rituals of his kind for days now, bringing you things he knew you would like—rocks, shells, even bones from deep within the sea. He had hoped you would understand what he was doing, even if it wasn’t something humans were used to. And when you accepted his gifts, when you smiled at him and thanked him, he felt like he was glowing from within. You were accepting him.

The colours in his bioluminescent freckles had grown brighter each day, especially when you were near. He could feel his body reacting to you—flashing brighter, chirping louder, humming more frequently. He had started making these sounds almost unconsciously, his excitement and affection bubbling up every time he was near you.

And then there was the moment when you said his name. Kai. A human name, but it fits. You had given him something special, something to define himself beyond just a creature of the deep. He had felt it then—an overwhelming urge to be closer to you, to protect you, to make you his.

---

You hadn’t realised it until later, but you had unknowingly been accepting his courting rituals. The smooth rocks, the shells, the soft chirping sounds—all of it had been Kai’s way of showing affection, of trying to bond with you. And you had accepted it with open arms, without even realising the significance of what you were doing.

One night, as you sat by the water’s edge, Kai was closer than usual, his large body half-submerged in the water. His golden eyes were fixed on you, his freckles glowing softly. You noticed how close he was, and how his massive form took up most of the space in the cave. But instead of feeling intimidated, you felt… comforted.

He chirped softly, his tail flicking in the water. "You… like?” he asked, his English much clearer now.

You glanced down at the latest gift he had given you—a perfectly polished piece of coral—and smiled. “I do. Thank you, Kai.”

His glowing freckles flared again, and the rumbling sound in his chest grew louder, more persistent. He was... happy. You could feel it radiating from him.

Without thinking, you reached out, your fingers brushing against his arm where the scales were smoothest. His body tensed momentarily, his eyes widening as he looked at where your hand rested. But then, he relaxed, a soft, pleased chirp escaping him.

You weren’t sure when it happened, but you stopped seeing him as just a sea creature somewhere along the way. It was Kai. He was awkward and endearing, and despite your vast differences, he made you feel safe.

And as you looked into his glowing eyes, your heart beat faster in your chest. You had grown fond of him—maybe even more than fond.

Kai’s tail flicked in the water, and he shifted closer, his face just inches from yours. His freckles glowed brighter, casting the cave in a warm, ethereal light. “Pretty… girl,” he murmured, the words filled with a strange kind of awe.

You smiled, your hand still resting against his arm. "And you're not so bad yourself."

For a moment, the two of you just sat there, the sound of the ocean filling the space between you. But something had changed. There was a new understanding, a new bond. You weren’t just surviving together. You were connected.

And from the way Kai’s eyes shone, you could tell he felt it too.

As the soft light from Kai’s freckles pulsed gently around you, you felt his large form shift beside you. Before you could react, he lowered his head, nuzzling it under your chin with surprising tenderness. His skin was cool and smooth, and the sensation sent a shiver down your spine, though not from fear. You hesitated, then let your hand drift to the back of his head, fingers tangling in the strange but silky strands of his dark hair.

A low, content hum rumbled from him, vibrating against your chest. He was close—closer than he’d ever been before. The warmth of his presence, the gentle weight of his nuzzle, made your heart race, and yet... it felt right.

“Have… pups,” Kai murmured, his voice halting but filled with sincerity. You froze, your breath catching in your throat as his words slowly registered. “My… pups.”

It was then that everything clicked into place. The gifts, the soft chirping, the glowing freckles, his constant presence. This wasn’t just him being kind. This was more. **He loved you.**

Your heart pounded in your chest as you pulled back slightly, looking down at him in stunned realization. His eyes, glowing softly, blinked up at you with that same innocence and intensity. He wasn’t just a protector—he saw you as his mate.

And somewhere deep inside, you realized that you didn’t mind the thought.

You stared down at Kai, your fingers still resting gently on his head as he gazed up at you, unaware of the weight of his words. His eyes were wide and expectant, as if waiting for your reaction. The warmth that had been building in your chest bloomed fully, but it was accompanied by a nervous flutter in your stomach.

"Pups," you whispered softly, your voice barely audible. The idea, once foreign and unthinkable, now seemed… less strange. It wasn’t just the word—it was the meaning behind it. The way Kai had said it, with such sincerity and hope, like he couldn’t imagine anything more important. The realization that this ancient, powerful being cared for you in ways you hadn’t even understood until now.

Kai’s tail flicked in the water, splashing lightly as he nuzzled you again, this time more insistently. “Yes… pups,” he repeated softly, the low rumble of his voice vibrating through you. He shifted even closer, his large frame curling around yours protectively. “You… mine.”

Your breath hitched at his declaration. The weight of what he was saying—what he felt—was starting to sink in. Kai wasn’t just offering you protection or companionship. He wanted more. He wanted to build a life with you, in whatever form that took. To him, it seemed so simple. But to you, the complexity of the situation was dizzying.

Could you feel the same way about him? Could you be with someone so vastly different, someone from a world so far removed from your own?

But as you looked into his eyes, glowing softly with that bioluminescent warmth, you realized that you already had. The time spent together in the cave, the strange courtship rituals, the quiet moments of connection—they had already won you over. You had grown attached to him, maybe even fallen in love without realizing it. And now, faced with his earnest desire, it was impossible to ignore.

“Kai,” you murmured, brushing your thumb gently over the side of his face. “You really mean that, don’t you?”

His head tilted, eyes blinking as though he didn’t quite understand why you would question it. “Mean… yes. You mine. We… together. Have… pups.”

You think for a few seconds “how…how would we..?”

His hand pushes against your thigh, twitching hard, which has your eyebrows pulling tight. You go pale when you look down. What you assumed to be his hand was something else completely, moving around against your thigh with a sticky sheen being rubbed on the skin of you hip like he’s grinding his double dicks against you. His tail is heavy enough to keep you in place under him, and his crawled hand is slid along your side while he purrs pathetically, looking up at you with sweet begging eyes “Oh, fuck,” you mouth, “oh fuck.” Trying to slip out from under him makes him let out a soft growl, mouth corners lifting to show his canines.

“I-i dont think i can take them..both” you gulp.

He doesn't seem to notice, all he desires is your affection, Kai brings his fingers up interlacing around your chin. Under the night sky, his body lights up, the shimmering blue lights on his skin and tail accentuating your own vulnerability. He offers you a smile, his deep brown eyes sparkling with longing in the soft glow of the moon. Your lips meet. You trace your fingers along his chest and stomach. A glimpse of his form emerges from his opening, and you can't help but smile as you circle his protruding tip. He sighs your name into your mouth, the sensation akin to the gentle ebb and flow of the sea against the rocks. Gradually, he slips his entire cock into your hands grasp, and you caress his length with gentle strokes. He recoils slightly, his head resting back, his scales reflecting the moon's light. Firmly holding you, he rolls you onto your stomach. You grin up at him, extending your hand to gently sweep away a few droplets from his face. He returns the smile. Leaning back, you spread your legs and clasp onto his hips, taking a deep breath as he positions himself for an intimate moment. Your moans fill the night as he fucks you with a rhythm reminiscent of the ocean's waves.

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