#fukaboshi x reader

Though you have heard nothing but praise of the young prince, you are horrified.

You weep and thrash for days, refuse all food, and on one occasion shout at your father that you would sooner be wed to a human, a remark that earns you a slap across the face. Your sisters do not help, whispering among themselves that shark mermen in particular are especially rough in their coupling, and wondering with a mixture of fascination and dread how many eggs a six-meter merman can fertilize inside a mermaid without breaking her.

When the day comes for your family to deliver you as a wife -or as you name it, as a sacrificial offering- you drag yourself forward with reddened eyes and a weight of sorrow so heavy that your scales, usually so bright and beautiful, lose their shimmer.

But everything changes the moment you see the prince.

Huge indeed, with a tail capable of raising at least twenty meter waves, and a mouth full of pointed teeth that stammers pathetically when it opens to greet you. His hands reach out towards you, in a clumsy and failed gesture that he has rehearsed a thousand times, to offer you a beautiful coral the color of your eyes.

You smile.

He is just as nervous as you are.

➡️ Continued for my own suffering and bellona's ........

First intimacy

He holds you so softly against his chest, trying his damndest to seem more confident than he really is....

He's never mated before.

He is so damned respectful towards mermaids and fish women... He adored his mom and still mourns her. He is ready to die protecting his sister if it is required. He is so damned responsible. So guided by the belief that coupling should only happen if the consorts love each other, that he never really worried himself over the matter… until now.

"Just kiss her," says his father briefly when asked, "listen to the sounds she makes and let them guide you. Your body will guess the rest".

And so he does, fingers tilting your face to his to prevent you from hiding again because you are so scared. You moan when his lips meet yours, and he is so focused on you, on the beautiful sounds you make for him, so delighted by the way your body reacts to his attentions, that he does not realize that his tail moves on his own, lovingly curling around the shape of yours.

Fukaboshi’s Ideal Partner 🔱🐬🧜‍♂️🌊

1. A Partner Who Matches His Kindness

Fukaboshi is a protector at heart. He’s strong and commanding when he needs to be, but at his core, he is gentle, always looking out for others. He’s drawn to a partner who shares that compassion—someone who treats others with kindness, who listens, who isn’t afraid to stand up for what’s right.

Nothing makes him fall harder than seeing you care for his people, watching you play with the children of Fishman Island, offering comfort to those in need. He swears his heart stops when you place a hand over his and say, “Let’s protect this place together.”

2. Late-Night Stargazing

Fukaboshi loves the quiet moments—lying on the sandy shore, looking up at the stars while the waves lap at the beach. He pulls you close, your head resting against his chest, his arm wrapped around you.

"Do you ever wonder if someone up there is looking back at us?" he muses, voice low and thoughtful. When you turn to look at him, the starlight reflects in his deep blue eyes, making them even more mesmerizing.

If you fall asleep on him, he doesn’t move an inch—he just smiles and lets you rest, his fingers tracing soothing patterns along your back.

3. Someone Who Can Handle the Depths (and Him)

Fukaboshi is a big man in every sense—tall, broad, and built like a warrior-prince. His ideal partner? Someone who isn’t intimidated by his sheer size, both in and out of the water. He wants a lover who embraces the feeling of being held, pressed against his strong chest, drowning in his affection just as much as they might drown in the ocean.

And speaking of the ocean—imagine clinging to him as he takes you on an exhilarating ride through the currents, his powerful strokes cutting through the water as he pulls you along, holding you so close you can feel the slow, deep rumble of his laughter. The pressure of the depths is nothing compared to the pressure of his grip when he finally gets you alone.

"You trust me, don’t you?" His voice is husky in your ear, his webbed fingers tracing the curve of your thigh as he floats just above you. "Let me take care of you… let me make you feel weightless in every way.”

4. Gentle Yet Dominant

He may be a prince, noble and kind, but when he wants something—when he wants you—he’s relentless. His kisses start slow, savoring every sigh, every trembling exhale, but once he has you fully under him, fully his? He devours.

His webbed hands, surprisingly warm, slide over your skin, exploring every inch as if you’re more precious than any treasure in the deep. His trident-wielding strength is matched only by his patience—he loves the build-up, watching you squirm as he takes his sweet time.

"I want to hear you beg, love." His voice is low, teasing, his sharp fangs grazing your collarbone as he presses you into soft silk sheets. "Tell me how badly you need me… and maybe I'll stop teasing."

But let’s be real—he never stops teasing.

5. Riding Sea Creatures (or Just Riding Him)

Fukaboshi is an expert rider—whether it’s guiding massive sea creatures through the currents or having you ride him with the same confidence. He enjoys watching you take control, hands pressed against his strong chest, thighs shaking as you move at your own pace.

His deep, approving groans vibrate against your skin, his hands gripping your waist, helping you keep balance. He loves when you take charge—when you lean down, kiss him breathless, and show him just how much you want him.

"You're beautiful like this," he murmurs, breath hitching as you roll your hips just right. His gaze darkens, pupils dilating as his fingers tighten their grip. "But don’t think I’ll let you have all the fun."

And the next moment? You're beneath him, drowning in his slow, deliberate thrusts, gasping as the prince of the sea claims you in every possible way.

Katakuri’s Ideal Part🍬🍩🍭🍮🍯

1. A Love That’s Simple but Meaningful

Katakuri isn’t one for grand romantic gestures. He shows love in quiet ways—by leaving a fresh cup of tea by your bedside in the morning, by slipping a hand around your waist when you least expect it, by making sure you always get the best of whatever’s available (even if it means sacrificing his own portion).

If he really likes you, you might find little surprises—handmade snacks, flowers he definitely didn’t spend an hour picking, small gifts he leaves without taking credit.

"I just… thought you’d like it," he mutters, looking away as if he’s not the strongest warrior in the world completely flustered by your gratitude.

2. Watching Over You While You Sleep

Katakuri doesn’t sleep much. When he does, it’s usually brief and restless, always ready to protect his family at a moment’s notice. But when you’re in his life? He finds himself staying awake for a different reason—just to watch you sleep.

It’s not in a creepy way, of course. He just… likes knowing you’re safe. That you trust him enough to let your guard down around him. He traces a gentle hand over your cheek, brushes a stray hair from your face, and sighs, feeling something settle deep in his chest.

"You have no idea what you do to me," he murmurs, his voice barely above a whisper.

If you wake up and catch him staring, he’ll turn away, muttering something about “just making sure you were comfortable.” But if you pull him closer and mumble, “Go to sleep, Kat,” he actually listens… because in that moment, he finally feels at peace.

3.The One Who Sees Through His Mask

Katakuri is the type of man who watches you before he lets you in. His ideal partner? Someone who sees past his intimidating exterior—the towering frame, the sharp fangs, the cold stare—and recognizes the man beneath.

At first, he’s cautious, reserved, his touches controlled. But once he realizes you truly want him—when he catches the way your eyes linger on his lips, when your fingers brush against his bare skin with something other than fear—his restraint shatters.

"You don’t have to hold back with me," you whisper against his lips, and that’s all it takes.

One moment, you’re standing; the next, you’re pinned against the nearest surface, your wrists held above your head as Katakuri devours your mouth like a man starved.

"You have no idea what you do to me," he growls against your skin, his fangs grazing just enough to make you gasp. "But you’re about to find out."

4. Dominant but Soft for You

Katakuri is a man of control. He’s used to being the strongest in the room, used to people fearing him. But you? You make him weak.

When he’s with you, he’s still dominant, still the commanding, powerful force that keeps his family safe. But behind closed doors, when it’s just the two of you? He lets himself feel.

He buries his face in your neck, inhaling the scent of your skin as he grinds against you, his rough hands skimming down your sides. He groans when you thread your fingers through his hair, his entire body shivering at the sensation.

"You’re going to ruin me, sweetheart," he murmurs, voice thick with need. And yet, despite the hunger in his eyes, he takes his time, savoring every single second as if he’s memorizing you.

5. Absolute Worship

Katakuri may be intimidating, but in the bedroom? He worships his partner. He’s the type to cherish every inch of your body, pressing open-mouthed kisses along your stomach, your thighs, watching you squirm beneath him.

"Let me taste you." The words are more command than request, his strong hands gripping your hips as he lowers himself, his breath hot against your core. "I want to hear you scream my name."

He doesn’t just want you to feel good—he wants you wrecked, trembling, breathless, incapable of thinking about anyone but him. And once he’s finally inside you, slow and deep, his forehead pressed against yours, his groans vibrating through your very bones—he stays there, savoring the heat, the tightness, the way you cling to him.

"Mine," he breathes, voice raw with emotion as he moves, deep and deliberate, watching your every reaction. "You're mine."

And when you finally reach your climax, shattering around him, he follows soon after, moaning your name as he fills you completely. But he's not done.

Prince Fukaboshi:

He's frozen. A million thoughts race at once.

Princely and political ones: What are the implications of a merman and human having a child? No, not just a merman, a merman of royalty. Not just one child, but two. How would this affect the delicate relationship between the merpeople and humans?

And then the thoughts that overall win the consciousness of his mind: I am going to be a father. The person I love is going to have my children. Children. Two.

His partner might think he's malfunctioned. He's always been a sturdy and silent guy but there is a blankness in his expression that concerns his partner.

He is thousands of miles away in his consciousness and his partner has to bring him back to the present

His reaction isn't over the top and despite all the turbulence inside, he smiles at his partner and holds them close, reveling in the joy with them.

If they're nervous or showing any fear about being with children, he packs his feelings away neatly and reassures them that everything will be okay

When he shares the news with his family, they all have the same worries as he does except for Shirahoshi.

She bursts into tears at the news and is the first to bring the prospective of their mother. How proud she would be that a royal member of the family is closing the inequality gap with the person he loves

This revelation brings him to a new understanding and even to tears.

There are political issues that still is up in the air but he's not just a prince. The joy he feels with his partner is more than he can express.

He was the one that helped raise his siblings so two children on the way doesn't intimidate him too much.

Going to Fishman Island and ending up in the private quarters of the next heir of the crown after the big battle was not part of your plans. But fuck you could never imagine leaving this paradise, especially being drawn to the eldest prince, who by chance was mesmerized by you as well. Humans had never crossed his mind as potential lovers, but you had bewitched him during your short stay, and he needed to have you alone. Even if it was for just a night, knowing well you had to continue your adventure with the rest of the country’s saviors.

Curious and gentle thumbs caressed the soft flesh of your inner thighs, eyes drinking in the sight of your plush and glistening cunt in front of him as you lay in his palms, with him on his stomach exploring your body. Admiring how small you were beneath his touch, easily able to pin your knees to your chest with his thumbs pressing on your thighs to spread them further, giving a tiny, adventurous lick against your slick folds with the tip of his tongue. However, upon hearing a loud gasp reach his ears, he withdrew the muscle and gave you a small despaired look.

“Did I do something wrong?” his voice remained soft, the prince’s ability to stay calm under any circumstances still prominent even in this unfamiliar situation.

The worry melted away from his face when you gave him a smile, stroking his hand, “Not at all, please don’t stop”.

With your words of encouragement, he dipped back down, his tongue eager to taste more of you, relishing in the music that fell past your lips while he discovered all the places that had you writhing in his hands, moaning his name in a shameless manner.

“Oh, prince Fukaboshi, it feels so good!”

He laughed lightly at your words, “No need to call me prince, it’s so formal,” he hummed before licking over your clit, feeling your body shake in his hands, his breath hot over your folds, “or is that a hint for me to call you princess?”.

He saw how your eyes widened in response before a loud gasp erupted from you when his tongue licked over your throbbing entrance.

“Oh god, fuck!”

A shiver pooled down his spine at your exclamation, blood rushing to his pulsing cock against the sheets. His lips enveloped your pussy in a warm kiss, groaning against you as he listened to how much you enjoyed his inexperienced mouth devouring you.

“I’m sorry, but it won’t fit,” his cheeks were tinted pink as he voiced his thoughts after turning to his back at your request, sitting against his wall with you on his abdomen, oh so close to his touch-deprived cock. It was lusting for you, twitching under your gaze where it stood proudly, larger than you had ever fantasized one to be. And it had you drooling, mesmerized at all the ridges and bumps along his length, disappointed that you wouldn’t be able to ever feel them massage your walls.

“Don’t worry about it,” you smiled, your hand reaching to stroke the smooth and burning hot skin, causing the prince to groan loudly, for once losing his composure, his shocked face meeting your playful one, “is it okay if I try something, my prince?”.

Choking on his breath, he nodded eagerly, eyes focused on your every move and grimace. His soul ascended when you licked at the head of his cock, as well as pushed yourself against his girth, trying to rub him as well as you could with your body, your soft breasts flush against him.

The prince had never experienced anything like it, throwing his head back against the wall while your small mouth worshipped his cock that held the power to split you in half and more. The fantasy of your warm fluttery walls around his girth alone had his eyes rolling to the back of his head, with a moaned whisper of your name.

“So big, my prince, I wish I could have you inside me,” you murmured against him, sending small vibrations through his length, adoring the deep sounds coming from his gut as the pleasure was too much to restrain any longer. And an idea formed in your head.

“Fukaboshi?” you bit your lip while catching his gaze, his lust-filled expression filling your core with unbearable heat. You pushed his heavy cock against his abdomen with the weight of your body as you straddled him, your hands finding the edge of his bulbous head, stroking it softly. And the prince moaned heavenly, his abs tensing beneath you as his breath quickened, “Is it okay if I ride you?”.

A small hint of confusion roused on his otherwise flustered expression, “Ride?”.

With a roll of your hips and a breathless sigh, you proved to him actions speak louder than words, your slick cunt dragging slowly against his cock. And you were so wet. Humping his massive length, you made sure to squeeze him tightly with your legs and press your hips down to provide him stimulation, along with your hands playing with his sensitive tip. A sight and memory he’d cherish until the next time you would meet. Praying that it wouldn’t be long until your next encounter.

His voice was laced with desire and disbelief when it reached your ears, “You look breathtaking like this, and you feel so good,” his praising words made you more eager, your hips starting a faster pace, riding the ridged underside of his cock providing an unfamiliar and overwhelming pleasure against your cunt, making you moan loudly for the prince.

“Oh fuck, Fukaboshi!”

“Just like that, you’re doing so good, princess,” a strangled groan erupted from him when your nails scraped softly against his sensitive skin, making you smile at him with triumph in your eyes. Wandering eyes saw how your breasts bounced with each aggressive roll of your hips, fucking yourself on his cock, having found the perfect place to stimulate your clit as well as delicately massaging your folds, your core burning as a knot tightened in your body.

“Fukaboshi - ngh! - s’good! Can’t believe I’m - ah! - lucky enough to be with a prince!” you moaned out through pants while looking into his dark, hungry eyes focusing on you. His hands wrapped softly around your body before you were on your back in his grasp, the prince looming over your form as his heavy cock splayed over your body, his eyes meeting your widened ones.

“Is this okay?” his thumbs spread your legs apart, just like earlier, before he withdrew his hips, the ridges dragging harshly against your puffy and slick pussy ripping a desperate moan of his name from your throat.

“God yes! Please fuck me, your majesty!” and fuck he wanted nothing more, starting a small, experimental pace with his cock rubbing against your body, feeling your small, eager tongue licking the salty skin of his tip with each thrust, as well as being hugged by the soft, plump flesh of your breasts and stomach. But what drove him insane was your pussy, knowing exactly where it was based off of the radiating heat it provided against his girth, his ears blessed by the symphony of sounds he pulled from you. What a beautiful sight you were beneath his cock, taking all he had to give, but it wasn’t enough to get both of you to the paradise you searched.

He placed you in his left hand while his right occupied his cock, pumping himself right in front of you, allowing you to see the veins protruding on his hands, and his raw strength as he carried you in his palm.

“Can you touch yourself for me, princess?” it was a soft plea rolling off his tongue between heavy breaths, and it had your fingers rubbing your sensitive bundle of nerves instantly, spreading your thighs to give him a better view of your needy, glistening cunt, your other hand exchanged between playing with your nipple and palming your breast. Nothing but slick, wet sounds and breathy moans and groans could be heard from the room as you pleasured yourselves at the sight of each other. The knot in your body tightened, making you throw your head back against his fingers with your eyes screwed shut in pleasure.

“Oh fuck, I’m so close!” with your hand starting to cramp, you fought through it, wanting to reach the edge faster, and he saw your furious rubbing and picked up his pace as well, squeezing his girth harder knowing he wasn’t far away from that sweet release either.

“Please cum for me, sweet y/n, show me how good you feel,” and stars followed by white fog suddenly dominated your vision, lightning shooting down your spine as you moaned and yelped loudly for the prince, spasming in his palm. And with a few more pumps of his hand, he covered his fingers in his release, as well as coating your body in his seed, luckily missing your face. Coming down from his high, guilt struck him when he saw what he had done to you; the guilt digging deeper by how much he loved seeing your body pooling in his release. Your lazy, tired smile let him know you were still experiencing your bliss, so he decided to take you to his personal bath while you came back to reality, cleaning off the remains of your naughty escapade, before placing your back against his chest as he soaked the two of you in warm water.

Having a long conversation full of laughs and promises to keep in touch, and lots of flustered mentions on how much fun the visit had been, you had to leave the prince’s room without a soul noticing you. A pirate shouldn’t be seen leaving the room of the future king of Fishman Island, after all.

I love him and this is my first time writing something like this okay?🧍‍♀️

You had never seen Fukaboshi so flustered in your life, a man normally so collected and strong was beyond just red in the face as he carefully slid a finger inside you. It’s almost as if he can’t believe this is real, the sounds you make, the blush darkening your face, or the way you were stretched around him. It all amazed him, hand tingling with the urge to press deeper and see just how much you could take but alas patience he reminded himself.

It’d taken quite some time to get you both here, Fukaboshi insistent on taking his time so as not to hurt you. Being taken care of by a prince wasn’t something you could complain about though as his hands ran along your body and he rubbed gently at your clit, sharp teeth ghosting over skin only to be met with kisses. He was so good at pampering you, only the best for you from the sheets you laid across to the way he held you so carefully. 

Experimentally, he crooks his finger and you cry out, jolting and he stops dead in his tracks. His face contorts into one of fear, the infatuation previously found disappearing in an instant as his other hand comes to stroke your face, thumb rubbing gently against your cheek. “Did I hurt you?” He quickly demands in a soft voice.

You wiggle your hips against his finger, panting softly at the feeling of it inside you, filling you so nicely. “Mmm no, just felt- felt really good.” Sighing, you spread your legs further as a wordless invitation for him to keep going. You weren’t glass and weren’t going to break, but the worrisome prince seemed to think differently. You can feel the heat on your cheeks spike when you make eye contact with him. “Can you do it again?”

“Only if you tell me if it hurts.” His lips are in a thin line, contemplative, as he waits for a response. You offer him the best smile you can and nod, extending a hand to his stroking your face to run your hand over rough skin. Slower than you had really wanted, he pushes his finger back in at the right angle and sparks explode behind your eyes, another moan catching in your throat at just how good it feels.

He feels like he’s everywhere, the gentle warmth of his hand cradling you and the stretch of just a single finger filling you up, pressing against all the right places effortlessly. Even with his cautious pace of pumping his finger in and out of you, it felt better than anything you could imagine. You squirmed in his grip, rolling your hips back against him fervently to keep that blissful feeling engulfing you.

“You’re very… eager.” Fukaboshi responds lowly, looming over you with eyes only for you squirming before him. He can’t tear away from it, head over heels with how well you were taking him. It was new to him, unfamiliar, but he can feel it stirring in his gut that he may become insatiable. 

“It feels so ah! Amazing!” You gasp out when you feel him prod impossibly deeper, his own curiosity taking over his caution and he presses his fingers into you. Your cries are like sweet music to his ears and how wet you were just excited him more, a thought lingering in the back of his mind of just how hot and wet you’d feel stretched out around his cock. God he could drool at the thought. 

“You look just as amazing.” His eyes are locked on the bulge on your stomach, disappearing and reappearing in tandem to his movements. Experimentally, his thumb presses down gently on the bulge and you sob, jolting underneath him and your head thumps against his hand. “Did… did that feel good?”

“S’ good.” You sob out, hands tangling in your hair when he does it again. You could cum from this alone, tension building in your gut as the knot starts being pulled tight. He can feel you squeezing around him, rocking his finger into you with a bit more fever as you sob and dig your fingers into his skin.

It breaks, the flood gate comes crashing open and you’re coming undone in the palm of his hand. Red hot sparks run through your body and turn your vision wet, your cunt spasming around his finger as you cum. Just like before, he can’t tear his eyes away, terrified he’ll miss a single second of it.

Crashing down from you high, you melt limply into his hand and appreciate the way he strokes along your body with feather light touches, shushing you softly. He lifts you up to his face, pressing kisses down your chest to your midsection, his tongue curiously dipping down to lick along your cunt. You gasp in overstimulation at the wet feeling along your clit, overwhelming but so good at the same time.

“Maybeee,” you drawled out, laughing as he attempted to tickle up your side.

“I have an idea,” Fukaboshi said slowly, tentatively. Recognizing the seriousness of his tone, you laid your hand atop his and looked up. He wasn’t looking at you, focused on the fish floating by above the two of you. “If you were amiable.”

You had to choke down the urge to tease some more. Fukaboshi always went proper and polite when he was anxious or unsure.

“Sure!” you said instead. Gentle hands grabbed under your armpits and lifted before positioning you on his shoulder. You steadied yourself with a hand buried in his thick blue hair as he adjusted, pulling out a bag of something that jingled as it moved and resettling himself, large speckled tail whipping back and forth. You watched with interest.

Fukaboshi was so handsome, you’d always thought so.

Finally, a hand reached up for you and as he grabbed you to pull you back down, you kept a grip on his hair. “Wait!” He stilled. “Kiss?” you asked hopefully. This close to his face, you could see with perfect clarity the way the confusion melted from his face and transformed into a sunny smile.

“Of course,” he agreed, cradling you with both hands. Quickly, he dropped kisses all over you, making you squirm in his grasp as you laughed joyfully.

Still, you couldn’t help a pout as he pulled back. “Not what I meant, prince,” you said with a tug at his hair. He rolled his eyes slightly. Even that expression didn’t take away from his beauty. Maybe others didn’t see it, with his pointed nose and sharp teeth, the mole in the center of his forehead but it was all you could see.

Tilting up your head eagerly, soft lips brushed against your own. Fukaboshi was always so careful with you, achingly so. He never wanted to hurt you.

Satisfied with your kiss, you released his hair and allowed him to bring you back down to his lap. Fukaboshi settled you with you facing him before digging into his bag and withdrawing something before handing it to you.

“Pick out the shells you like,” he said with a small, secretive grin.

Peeking inside you were astonished by the sheer amount of shells in there. None were very large, all about the size of your palm or smaller. Picking out one, you stared at it before he held out a palm and you placed it there.

In a smooth motion—you didn’t exactly catch what he did—he had the shell on a skinny bendable metal rod. “Keep going,” he encouraged and quickly you snapped up another one.

It took you a while to realize what he was making, although once he got the shape down you had to bite down a gasp.

Fidgeting awkwardly, when you finally handed over the last shell you waited with bated breath to see what he’d say.

He’d made you a small crown, perfectly sized for your head. The mismatched shells should have looked silly but honestly were anything but.

Fukaboshi brushed your hair back softly. “For my own prince,” he said lowly before laying the crown upon your head.

Immediately you reached out and touched it, feeling the smoothness of the shells beneath your fingers. “Silly,” you croaked out past the sudden lump in your throat. “You’re the actual prince here, not me.”

“You’d make a wonderful prince!” Fukaboshi cried out. “One day. Until then, I can teach you.”

“Careful,” you warned, “might be giving me ideas.”

The seriousness in Fukaboshi’s eyes didn’t fade. “You don’t like the idea?”

You bit your lip and he thumbed at it until you released it. “I didn’t say that, just feels…”

“Hm?” he prodded.

“Not sure if I’d be a good candidate for it,” you settled on. Many didn’t understand how you caught the eye of one of the Princes of Fish Man Island, not to mention the crown prince, the one destined to rule. You didn’t understand half the time either, but you reveled in Fukaboshi’s attention all the same, expecting him to break it off someday.

This was wholly unexpected.

“You’d do great,” Fukaboshi said genuinely. Two thumbs rubbed against your cheeks, tilting your head up. “I’ll ask properly later. But just know, I very much believe that. And,” he added with a smile, “now whenever you call me a prince, I get to call you it too.”

You couldn’t help it, you snorted with amusement.

“Yeah okay, you win,” you conceded.