Ryusui Nanami x Reader (like the kohaku one, I wrote this has a woman so reader would be fem for me but there is no gender used)

Warnings : fluff, humor again lmao, romance, adventure, talking of marriage, greedy ryusui, comedy

Words : 1,3k

Notes : finally a solo headcanon about ryusui who is literally my fav character 😋, writing about him was so fast and fun !

જ⁀➴ His love language is obviously buying you things. (Everybody don’t act shocked)

Well…now in the stone world it’s more like making things for you, because money isn’t exactly a thing anymore.

Oh wait nevermind this guy first accomplishment after being revived by Senku was to create money.

But anyways, back in the old world?

You could have any gifts such has, luxury jewelry, designer clothes, private yachts, and many more. He’ once sail halfway across the world because you casually said,

“Oh, those seashells are pretty there.”

And so three weeks later,

“Y/N.”

“Hm?”

“I brought you a beach.”

“…A BEACH?? FOR WHAT?”

“Seashells of course, the island had more but the locals said I couldn’t buy the island..”⸻

જ⁀➴ Senku’s biggest problem isn’t science anymore.

It’s you two. One time he tried to explain chemistry and Ryusui raises his hand.

“Question.”

“…What?”

“Would Y/N look good wearing a lab coat?”

“……..We’re discussing sulfuric acid.”

“So yes?”⸻

જ⁀➴ Ryusui def believes greed is beautiful.

Which means…He’s greedy about you, too. But more greedy then usual and not in a possessive way. More in a,

“I want every smile of you.”

“I want every adventure with you.”

“I want every sunrise we can watch together.”

“I want every dance of you.”

“I want every future involving you, or us.”

He says it with the exact same enthusiasm as,

“I WANT OIL TOO!”

Because to him wanting more of the people you love is nothing to be ashamed of.⸻

જ⁀➴ He flirts like he’s breathing.

“You’re beautiful.”

“Your hair looks lovely today.”

“I’ve been looking for you.”

“You improve every room you enter.”

And he says it so naturally that sometimes it takes you a full minute to realize… Wait. Was that flirting? And the response is yes, always yes.⸻

જ⁀➴ Everyone that is new on the Perseus will knows about you two eventually.

It’s not like you’re not hiding anything, it’s mostly because Ryusui refuses to. So he’ll casually throw an arm around your shoulders during meetings and smile proudly.

“My lady/man.”, ”my love”, ”my future wife/husband”, etc…

He’s simply introducing the greatest treasure he’s ever found.⸻

જ⁀➴ Gen immediately regrets teaching ryusui new pickup lines.

Because honestly Ryusui doesn’t need more pickup lines, he got full of them but somehow Gen got a whole package too…

So Gen thought it’d be funny to make him learn some more !! Big mistake. He taught Ryusui the famous:

“Did it hurt when you fell from heaven?”

And so the next morning Ryusui walks up to you. Completely serious otherwise it wouldn’t work for him.

“Y/N.”

“…Yes?”

“Did it hurt? When uh…I…fell?”

“…Captain ?..”

“…damn it I forgot the rest.”

So yes Ryusui might have a lot in his sleeve but learning new ones might be more difficult then expected…⸻

જ⁀➴ THAT MAN TALKS NONSTOPS ABOUT YOU

He absolutely brags about you. Someone compliments your navigation? Ryusui beams.

“I know! You should’ve seen her yesterday!”

You catch a fish?

“Magnificent!”

You tie a knot correctly?

“Incredible!”

At this point, the crew could sneeze in your general direction, and Ryusui would somehow turn it into a speech about how talented you are.⸻

જ⁀➴ Fancy dinners still happen even in the stone word

You are still his treasure after all and you deserve the best out here. So Ryusui successfully convinced everyone to decorate a room inside the ship with flowers, candles, fresh fish and fruit with a beautiful view of the sunset by the window there.

He will then dramatically pulls out your chair.

“You deserve luxury.”

Chrome whispers,

“…We’re literally eating grilled fish.”

“Chrome, it’s Elegant grilled fish.”⸻

જ⁀➴ His greed has one weakness, You.

One day he catches a rare gemstone and that boy is ecstatic about it.

“It’s magnificent! It’ll be invaluable once civilization returns!”

You pick it up.

“…It’s pretty.”

He smiles.

“…Then keep it.”

Senku nearly drops a beaker when he heard that one, so he put his index finger in his ear as usual but this time to clean it to know if maybe he had heard wrong...

“…You just gave away the thing you’ve been talking about for three weeks.”

Ryusui shrugs.

“I can always find another gemstone.”

“…”

“…I only have one Y/N.”

“…Did you just accidentally become the smoothest man alive?… ten billion percent of points for romances”⸻

જ⁀➴ Once Ryusui trained a parrot for you so it could compliment you when he is not around…

Ryusui actually made him learn the word,

“Beautiful!”

And only to you, every day…. Now every time you walk onto the deck the bird screams,

“BEAUTIFUL!”

“CAPTAIN LOVES YOU!”

Ryusui looks proud and in opposition Senku immediately starts calculating how to unteach a bird.⸻

જ⁀➴ He absolutely spins you around when you both are separated from eachother a bit longer than usual (long for him is 30minutes)

Let’s say you haven’t seen each other all day. Well the moment he spots you—

“There you are!”

Before you can react he’s already hugging you and lifting you off the ground, spinning once, twice. The crew doesn’t even react anymore. This is just Tuesday for them…⸻

જ⁀➴ Ryusui can only sleeps if you are around but he is not the best sleeper to be around…

His position is a whole starfish. (Of course, he loves the sea) but because of this he takes up all the space so you would wake up hanging halfway off the bed.

He’s somehow diagonal?? Blanket wrapped around him like a burrito. So you need to poke him until he wake up.

“…Ryusui.”

“Mmm?”

“You stole the blanket.”

“…Our blanket.”

“…greedy.”

He grins with his eyes still closed.

“Exactly.”⸻

જ⁀➴ Gen and Kohaku have a running bet everyday now.

Today’s question:

How long before Ryusui says he wants something? Answer ?? Maybe Five seconds.

“Good morning! I WANT COFFEE!”

Kohaku sighs.

“…Lost again.”

Then Ryusui notices you walking by.

“I ALSO WANT Y/N.”

“…”

“…That sounded less weird in my head… sorry my treasure..”⸻

જ⁀➴ He’s surprisingly vulnerable with you.

Most people see Ryusui as loud, confident, even fearless has he is always chasing the next impossible dream.

But when it’s just the two of you, late at night on the deck with the stars overhead…He lets the act soften, he admits when he’s scared of losing people or he talks about growing up in the Nanami family, where success was expected and the inability to be has free like he wanted.

He rests his head on your shoulder with a tired sigh.

“…Everyone thinks I always know what to do.”

You lace your fingers through his.

“You don’t have to know everything.”

For a moment, he’s quiet. Then he smiles- smaller than usual, but somehow more genuine.

“…Greedy people always want more.”

“Hm?”

“I want one place…where I don’t have to be just Captain Ryusui.”

He looks at you with an expression so soft it almost doesn’t seem like him.

“And when I’m with you…I get to just be Ryusui.”⸻

જ⁀➴ Ryusui dream a lot, and hard one.

One evening, everyone is gathered around the campfire and after hours of talks about everything and anything, Chrome asks,

“So, Captain, what’s the first thing you’re gonna buy when humanity will be restored?”

And without hesitation—

“A fleet.”

“Or maybe another island.”

“OH ! A palace too.”

“AHAH, A HOTEL TOI.”

“Or wait…a dozen airplanes instead….HOW ABOUT ALL OF THOSE !”

Senku nods.

“…Sounds about right.”

But Ryusui keeps going-

“A worldwide shipping empire.”

“A winery in my palace.”

“A chain of restaurants or every different cultures .”

Chrome’s eyes get wider with every answer.

“…Anything else?”

Ryusui glances at you and his grin softens.

“One ring.”

Making the entire camp goes silent. Hell, even the fire seems quieter.

Senku pinches the bridge of his nose.

“…Ten billion percent cheesy.”

Ryusui laughs, completely unashamed.

“AHAH, What can I say? I desire the whole world.”

He slips his hand into yours.

“…But if I’m building a future that big…I want you standing beside me to see it.”

ryusui x reader smut!

nsfw- this has nothing to do with my ryusui fanfic greedy, just a random oneshot

The ship creaked quietly under the night sky, half-finished. You hadn't expected to be cornered against one of its wooden beams, Ryusui's body pressed flush to yours, his mouth devouring every word you might have said.

His kiss was hot, demanding, tongue sliding against yours like he owned you already. He broke away only to grin down at you, eyes burning with a hunger that was more dangerous than the sea itself.

"Do you know what it does to me, my treasure," he purred, one hand tilting your chin up, "to see you shining even in this primitive world? To know you are mine?"

You opened your mouth to retort, but his hand slipped beneath your clothes, and your breath hitched instead. His fingers trailed deliberately slow across your stomach, lower, lower, until they brushed where you needed him most. The smug tilt of his lips deepened when you shivered.

"So wet already?" he teased, voice low. "Ah, but of course—you're exquisite in every way."

Your protest came out as a gasp when he pushed your legs apart, fingers slipping against your folds, stroking lazily, deliberately, until your knees weakened. He pinned your wrist above your head with his other hand, forcing you to lean into him for support. Every movement was calculated, controlled, yet desperate in its own way—greedy.

"Look at you," he whispered against your ear, teeth grazing the lobe, "my divine treasure, trembling under my touch. Say it. Say you're mine."

When you refused, biting back the words, he chuckled darkly and dropped to his knees before you could stop him. His golden eyes glinted up at you as his hands spread your thighs apart, and then his mouth was on you—hot, hungry, unrelenting.

You cried out, the sound muffled quickly by your own hand, but Ryusui yanked it away. "No, no, my love," he said, licking you with a slow drag of his tongue. "Let the world hear how beautiful you sound."

He buried himself between your thighs, lapping at you like a man starved, tongue circling and plunging until your hips bucked against his face. He groaned into you, savoring your taste, drinking every drop of your pleasure. When you came undone, trembling and gasping his name, he licked you through it, greedy for more.

But Ryusui was never satisfied with just one taste. He rose, wiping his mouth with the back of his hand, grinning like he'd found gold. "Perfect," he said, voice husky. "But I'll need more."

He freed himself from his pants, hard and aching, pressing against your slick entrance as he leaned in to kiss you again—deep, messy, letting you taste yourself on his tongue. Then, with one slow, deliberate thrust, he filled you.

The stretch made your breath hitch, and he groaned low in his throat, burying his face against your neck. "Ahh... tight around me already. You were made for me, weren't you, my darling?"

He didn't give you time to adjust before he began moving, hips snapping forward with a rhythm that was both punishing and worshipful. Every thrust drove you higher, his hand gripping your thigh to hold you open for him as he took and took and took.

"Beautiful," he panted, pressing kisses across your throat. "Every sound, every shiver—it all belongs to me. Say it. Say you're mine."

This time, when the words tumbled from your lips, he groaned like he'd claimed the world itself. He fucked you harder, faster, chasing his release while coaxing yours again, greedy as ever. And when you broke apart beneath him a second time, he spilled into you with a shuddering moan, holding you tight as though he'd never let go.

Even afterward, when your body was trembling and spent, Ryusui's hand stroked your cheek, his smile softer but no less intense. "Exquisite," he whispered, kissing you gently now. "The greatest treasure of all is you—and I'll never stop being greedy for you."

a/n

-FINALLY MADE A SMUT couldn’t wait anymore lol

-not the best don’t worry my smut for my fic isn’t going to be this bad

-had to clear out my drafts writing is lowkey therapy I wish it could be my real job but I’m a flipping teacher

-pls lmk if u liked this mess and if u want more random oneshots with other characters too!!

-BTW TS WAS SO RANDOM I FINISHED WRITING IT AT 6AM LMAOO

🪼taglist (comment/like/reblog to be on it!!)

@anajellyc

@maruchan05

@frootloopscos

@smokefilm

@dearanlifezhard

@creatorbiaze

@cherri-ish

@agikay21

@the-true-imortal

@abyssal-via

@ginevraxrogers

@usagi-una

YAY i’m so glad you likey, I’m entering flow state rn…

----

୨୧ —Ryusui nanami- pursuing reader headcanons {sfw}

────୨ৎ────────୨ৎ────

ᘛ When Ryusui first sees you, he is immediately intrigued, not in a quiet way too. Once he has his eyes set on you, it’s hard for him to turn away.

ᘛ He treats pursuing you as a challenge, not because your necessarily ‘hard to get’ but he instead sees it as a goal to make you his. He believes your worth winning.

ᘛ There wont be a moment where he isn’t complementing you- it can be over the smallest things whether that be your intelligence or the way you did your hair today.

ᘛ His flirting game is…unique to say the least, and also painfully obvious. Ryusui will constantly being trying to get your attention, and you wont catch a break of it. He will also do anything in his power to make you blush, watching your rosy cheeks and the way yoyu hide your face never fails to make him melt.

ᘛ Gifts are often and tend to be very pricey, he will simply hand it to you, and before you can say a word about the price, he simply flashes you a grin and a “dont overthink it, i wanted you to have it.”

ᘛ Heavy on acts of service when he takes you out on 'platonic dates', he will carry your bags whenever you go out shopping, he is paying for everything of course 😽 it may or may not also be the perfect opportunity to show his strength off.

ᘛ Once he finds out you may like him back he plays it cool, but is screaming internally. Ryusui definitely overthinks it slightly though, wondering if it’s really true.

ᘛ When he finally decides to ask you out, he asks in the most romantic way possible- flowers, chocolate and an expensive necklace smirking, but deep down he is fearing rejection. Of course you reciprocate those feelings, because who wouldn’t fall in love with Ryusui Nanami?

--

Ryusui relationship headcanons

Do not mention wanting anything around him unless you are prepared to get it as soon as possible, because he will make it happen no matter the cost

He enjoys getting gifts from his partner, but this does not mean he requires pricy things ! He just enjoys having something from them, or something small that reminds me of them or has some kind of meaning

He is very loud and proud about PDA! He doesn't want his partner to think for even a second that he is not into them or that they are not loved. That, and he likes the affection.

He is a bit new to being tied down in a relationship, so he needs some time to adjust- But he is putting in a ton of effort. He regularly plans dates but they might be a bit too over the top too often.

One gift he ends up giving is a rose carved from either stone or wood. He's given plenty of roses before, but he wanted to give one that will last longer, just like your beauty lasts no matter how much time passes.

Prepare to regularly get 'kidnapped' for cuddling too

☆ Character x male!reader ☆

☆ CW/TW: Minors and female aligned DNI, n.sfw content, mention of cum, brief description of sex positions, mention of rough sex ☆

☆ A/n: Sorry to the person who requested, but I've erased it by mistake, so I hope you'll still find it. Also, this is the first time I write smut, so it's a little short, but I hope you'll still like it. ☆

I've always headcanon this boy as a switch with bottom tendencies, so a top boyfriend is perfect for him.

He has no shame when it comes to his body (he was naked when he came out of the petrification and it didn't bother him) and he thinks you shouldn't too. He thinks everybody is beautiful and you're not an exception.

Ryusui has always wanted everything, and having all your attention on him when you're on top of him it makes him happy as he could be.

He is pretty loud, he wants to be sure that you know you're doing a good job and that he likes it.

Ryusui loves the missionary, just to see your face and being close to you as possible. He also wants you to kiss his neck and lips during the moment.

That being said, he's not against other positions; likes it when you take him against the wall or fuck him on a desk.

He's a big fan of holding hands during sex, it's another way to be close to you.

Ryusui likes slow and loving sessions, but some nights he will just want to being fucked roughly and become a mess on your length.

He prefers you to cum inside him or on his tummy, but inside is his favorite since it feels so intimate to him.

Doing meh but good over all!

I don't usually do x readers for headcanons but I'll do my best!

Ryusui obviously spoils his boyfriend, giving you everything you want and takes you on any trip around the world (pre-petri).

Ryusui calls you his little dragon.

After petrification, he orders Francois to find you as soon as possible to reunite.

Ryusui loves giving his boyfriend kisses on the forehead and on the back of your hands.

He'd propose to you by giving kneeling down while you two are cruising on one of his ships at sunset and he'd say something like "I may desire everything in this world, but I desire you the most".

He'd be loud and proud about his boyfriend to the entire world, anyone who has a social media account would have knowledge that Ryusui has a boyfriend, unless you don't allow him to share that information.

Ryusui respects your privacy and boundaries so much and refuses to make you uncomfortable in any shape or form.

Ryusui doesn't usually cook, but if it's for you, he'd cook a meal with his own hands. He'd cook anything you'd want regardless of where it originates from. (He will need a hand from Francois, though.)

He isn't afraid to do PDA, hand holding, smooches, hugging, head pats, he'll do anything to show his affection.

On that note, he's very affectionate and clingy. He keeps his distance a little more when in public (ie, maybe only giving you affection once every 10 minutes), but he will be all over you when alone, snuggling up against you and giving you kisses on the cheek.

Ryusui loves his scalp and shoulders being massaged, so after a rough day, he'll request a simple massage and cuddles.

He likes to clear his mind walking outside near big bodies of water, and sometimes you join him just to keep him company.

Ryusui rarely cries, and the only times he does is when he's under intense pressure and frustration, you comfort him by massaging his scalp and letting him sit in your lap while you rub his back as well.

He makes miniature boats just for you and whenever he gifts them to you he makes a little note "to the best man in the world" or something else really cheesy.

He falls asleep cuddling you, but he'll shift around and get greedy with the blanket so you have no choice but either yank some cover back on to you or snuggle up to him for warmth.

Ryusui will even custom design an actual boat for you if you asked for it. Just request it and it'll be made in a heartbeat.

✧ General Relationship Headcanons

• Ryusui fell for you the moment he laid eyes on you. Whether you were revived at the same time as him or later, he treated it like fate and made it his mission to sweep you off your feet.

• He’s shameless with his affection—grand declarations, over-the-top flirting, and dramatic gestures that make everyone roll their eyes (except you, though you pretend to be unimpressed).

• He absolutely adores calling you pet names—“my goddess,” “my treasure,” “beloved”—and insists on saying them in front of everyone, no matter how flustered you get.

• Banter is the foundation of your relationship. You tease him for being overdramatic and greedy, but you secretly love his fire. He loves that you don’t bend easily to his charms and can spar with him verbally.

✧ Protective / Soft Ryusui Headcanons

• If anyone ever insults you, Ryusui immediately challenges them—verbally, dramatically, or even physically if needed. He won’t tolerate anyone diminishing you.

• He notices when your mask slips—when you’re tired, overwhelmed, or insecure—and those are the rare times he drops his flamboyance to be gentle and genuine with you.

• He tells you often, so often, how much he admires not just your beauty, but your strength and brilliance. He believes wholeheartedly that you’re his equal, his partner in greed for life itself.

• Sometimes, when it’s just the two of you under the stars, his voice softens and he admits things he doesn’t tell others—fears, dreams, and how much you truly mean to him.

✧ Romantic Headcanons

• He loves kissing your hand dramatically in public, but in private, he lingers with softer kisses on your hair, your forehead, your temple.

• His idea of a date is either the most extravagant thing possible (sailing, hunting for treasure, feasts) or something surprisingly simple, like watching the sunrise together.

• He keeps mental “treasures” of you—small details you’ve shared about yourself, favorite foods, little quirks. He’ll bring them up casually, proving he listens more than people think.

• Ryusui constantly says things like, “The greatest treasure in this world is you, my darling!”—and though it sounds like one of his usual dramatic lines, you’ve learned he truly means it.

✧ General NSFW Headcanons

• Ryusui is greedy in every sense—once he has you, he wants all of you. He’s endlessly passionate and doesn’t tire easily; stamina is definitely one of his strong suits.

• He sees intimacy as an adventure—something to savor, something to conquer, and something to enjoy to the fullest.

• Praise is constant. He’ll call you “exquisite,” “divine,” “my treasure,” and make you feel like the most precious jewel in the world.

✧ In Bed with Ryusui

• He loves taking control, but not in a cruel way—more in a grand way. He’ll guide you, pin your wrists above your head, whisper filthy promises, and then lavish you with pleasure until you’re melting.

• That said, he absolutely adores when you surprise him by taking charge. It excites him, and he’ll grin through it, praising your boldness.

• He has a bit of a voyeuristic streak—he loves watching you squirm, watching your expressions, and hearing every sound you make. Your reactions are his greatest treasure.

• His aftercare is always indulgent: holding you close, stroking your hair, and murmuring sweet words about how lucky he is to have you.

✧ Kinks & Preferences

• Praise kink (giving & receiving): He’ll worship your body like it’s sacred, and he melts if you praise him back.

• Exhibitionism (light): He gets a thrill out of risky places—quietly pulling you aside during a voyage or sneaking you away under the stars.

• Oral (giving): Ryusui has zero shame in burying himself between your thighs for as long as it takes. He’s greedy, thorough, and smug about how well he can make you come undone.

• Teasing: He’ll draw things out, whispering exactly what he’s going to do to you before actually doing it. The anticipation is half the fun for him.

• Possessiveness: While not controlling, he loves leaving marks—hickeys, bites, anything that says you’re his treasure.

✧ Positions & Habits

• His favorite positions are ones where he can see your face—missionary with your legs over his shoulders, or taking you from behind with your reflection caught somewhere. He wants to watch you fall apart.

• He has a dramatic habit of kissing you deeply before and after every round, like sealing a deal.

• If you try to outlast him, good luck—his stamina is absurd. He’ll tease, “My love, the night is still young, and so are we!” and keep going until you can’t anymore.

19/08/25

a/n

-had the idea to write this at 5am after a mental breakdown bcs my vape died lmao

-lowkey rlly bad I wrote this before I made my fic as a kinda guide as to how he’d act

-will make a better one soon js wanted to feed u guys before the next few chapters

-when should I post the next chapter of greedy!!

🪼taglist (comment/like/reblog to be on it!!)

@anajellyc

@maruchan05

@frootloopscos

@smokefilm

@dearanlifezhard

@creatorbiaze

@cherri-ish

@agikay21

@the-true-imortal

@abyssal-via

@ginevraxrogers

@usagi-una

@okaga48 had me slaving away for this 😔

___________

“you okay?”

Ryusui’s voice is sweet, concerned, momentarily distracting you from the raging storm outside the Perseus.

“its late, love. You should be sleeping.”

You shift slightly in the doorway of the control room, trying your best not to come across as vulnerable.

“Just…cant sleep.” you reply quickly, going to sit on one of the chairs nearby, wrapping yourself back up with the blanket you cane in with.

Ryusui watches you sit on the chair, your knees tucked to your chest. Without a second thought, he walks over to you.

He kneels down infront of you, whispering, “whats wrong, hmmm?” his usual smug, teasing personality gone.

"im fine."

"are you scared of the storm?-"

"No...!"

He smiles, knowing your lying. Before you can say anything else, he picks you up, and carries you to his chair near the front of the room, a big glass pannel infront, with a view of the storm outside.

"You don’t have to be scared, sweetheart." he whispers, sitting down into his plush leather chair, letting you straddle him.

you sigh, relaxing into his body. Ryusui's hand comes up to your hair, running his hands through it.