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It starts, as most catastrophes do, with Luffy. More specifically, with Luffy grinning around a mouthful of meat, pointing a greasy drumstick at Sanji and Zoro like he’s just declared the most obvious, rational, and totally infallible strategy the world has ever known.
“You two should pretend to be married.”
Sanji chokes on his cigarette. Zoro, who had been perfectly content pretending to be asleep against the side of the Sunny, cracks open one eye, narrows it, and immediately closes it again, as though reality itself has offended him.
“Absolutely not,” they say in perfect unison, which only makes it worse.
Nami sighs the sigh of someone who has suffered too much idiocy in one lifetime and has at least two more hours of it ahead of her. “It’s the only way,” she says, sweetly patient in the way only the truly dangerous are. “The royal couple of Galleta Island is inviting married nobles to this week’s masquerade ball. All others are denied entry. That’s where they’re hiding the stolen Log Pose. We need someone on the inside.”
Robin, smiling too serenely, adds, “And a couple that seems utterly devoted and inseparable. Passionate, even.”
Brook nods sagely. “You know, like they can’t keep their hands off each other! Yohohohoho!”
Sanji makes a sound that can only be described as a strangled teapot having a nervous breakdown. “Me? With that moss-stained bastard?”
Zoro sits up now, cracking his neck. “I’d rather gouge my eyes out with Wado.”
Franky crosses his arms. “You two already fight like you’re married.”
“I WILL END YOU,” Sanji howls, launching across the deck toward Zoro, who meets him with a knee and a smirk, and for the next forty seconds the Sunny becomes a domestic war zone made of insults, flying sandals, thrown sake bottles, and the unmistakable noise of a cook being forcibly headlocked into a love tap that could dent metal.
Eventually, Usopp—suffering deeply—interrupts. “That’s literally the kind of unhinged chemistry we need.”
Luffy beams. “YEAH! YOU’RE SO GOOD AT THIS ALREADY!”
And somehow, as if by the laws of chaos that govern their every move, they end up in the tailor’s the very next day, Zoro sulking in a brocade waistcoat while Sanji debates the ethics of murdering someone with a hatpin.
“You’re stepping on my foot.”
“Maybe if you weren’t hogging the floor like a swinging barn door—”
“Oh, I’m sorry, I didn’t realize your masculinity was so fragile it couldn’t survive proximity to dignity.”
“At least I have dignity, you frilly-ass disaster.”
“Frilly-ass—”
The tailor, a poor unfortunate soul who will be charging them double for emotional distress, claps his hands together. “Wonderful! Such passion! You’ll be the talk of the ball!”
Sanji opens his mouth to scream and Zoro opens his mouth to fight and somehow—somehow—they’re both standing there an hour later with golden rings on their fingers and fake identities sewn into their sleeves and a glittering invitation addressed to “Lord Lysander and Duke Orivell,” complete with a honeymoon suite at the Grand Château d’Émerillon.
“It’s one week,” Nami says. “Just infiltrate, steal the Log Pose, and act married. That’s it.”
“I don’t even know how to act married,” Zoro mutters as they disembark under fake names and fake smiles and a real sense of impending doom.
“You argue,” Sanji says, flat. “Constantly. You keep secrets, you get suspicious of everything, you mock each other with thinly-veiled compliments. You share a bed for tax reasons. You probably have unspeakable kitchen sex on counters that have seen better days.”
Zoro stares at him. “You thought about this too much.”
“You asked!”
Their cover story is airtight. They’re eccentric nobles from the Kingdom of Blusterina. They met during a fencing match. Sanji wooed Zoro with a soufflé that nearly killed a monarch. Zoro confessed his love by sword-fighting a bull. They adopted a goose named Heracles. Sanji insisted it be in the official documents.
The guards let them through immediately.
They arrive at the palace in a chariot so gaudy Zoro almost leaps from it to spare himself. Sanji is fully reclining in faux fur, a rose between his teeth, waving at civilians like the corrupt elite he was born to impersonate.
“God, you’re leaning into this.”
“I was born for this, marimo. It’s called class.”
“Is it also called being a sparkling jackass?”
“Oh, I’m sorry, is the big strong swordsman threatened by my flair?”
Zoro growls, “You’re lucky I don’t kill you in your sleep.”
“You’d miss me,” Sanji says, stupidly, smugly, beautifully.
And Zoro pauses.
Because that one was too natural.
They check into their suite. There’s one bed. Of course there’s one bed. There is always one bed. It is massive and covered in so many pillows Sanji nearly drowns in them when he falls back dramatically, wailing about how “tragedy has kissed his brow” and “his life is a farce of domestic compromise.”
Zoro sits in the chair across from him, arms crossed.
“You’re gonna be insufferable all week.”
“You’re going to be too aroused to function by Wednesday.”
Zoro throws a pillow at him. Sanji gets hit square in the face. Zoro smirks, victorious—for a moment—until Sanji throws himself onto the bed like a fainting duchess, kicks off his shoes, and announces: “I require wine, a massage, and someone to feed me chocolate-dipped strawberries while telling me I’m prettier than the moon.”
Zoro hurls the room service menu at his head.
But later, when they’re dining in the glittering ballroom surrounded by nobles with sinister smiles and suspicious eyes, something shifts.
Sanji leans in just enough to tilt Zoro’s world thirty degrees on its axis.
“Remember,” Sanji murmurs, all warm breath and too much cologne and that stupid, stupid mouth, “we have to look convincing.”
Zoro takes a sip of wine, meets his gaze, and deadpans, “You look like a man who cries during opera.”
Sanji’s smile is lightning.
“You look like a man who’s into that.”
Zoro doesn’t realize he’s in danger until the fifth time Sanji laughs that night. Not the usual scoff, not the derisive snort he hurls like a dagger when Zoro says something idiotic (which is often), not the vaguely homicidal giggle reserved for when someone insults his cooking—but a real laugh. Sharp-edged and bright. Open. Like he forgot he was supposed to be annoyed. Like it surprised him. Like it made him happy, and he didn’t know what to do with that, so he let it out in a sound that is going to ruin Zoro’s life.
Zoro looks away too fast, pretends to be very interested in a tapestry of a goose playing the violin. The noble beside him is describing something treasonous in a whisper, probably. Zoro hears none of it.
Because Sanji is laughing and for a second, it doesn’t feel like pretending. It feels like they’ve been doing this for years.
He watches the way Sanji’s eyes crinkle when he’s not trying to look good for a camera, for a crowd, for a mirror. Watches the way his hair falls across his brow, too fine, too soft, probably smells like expensive shampoo and infidelity. Watches the way his fingers rest lightly on Zoro’s wrist when he leans in again to murmur, “The woman in the ruby dress is hiding something in her cleavage, and I don’t just mean a winning personality.”
Zoro chokes on his wine.
Sanji smirks, devastatingly pleased with himself, like he knows he’s committing crimes against human dignity.
Which, he is.
Sanji touches Zoro like he’s always known the shape of him. Laughs like it’s muscle memory. Looks at him like he’s watching the moon drown in the sea and wondering if he should jump in after it.
Zoro hasn’t been this afraid since Thriller Bark.
And it only gets worse.
Their suite is too big and too gold and the bed is so obscenely soft it feels like sleeping inside a dessert. Sanji sprawls diagonally across it the second they return, kicking off his shoes with a groan and dramatically rolling onto his stomach like a dying starlet.
Zoro strips off his jacket, throws it over a chair, and glares at the ceiling like it’s personally responsible for his suffering.
“I saw you eyeing that redhead with the fan,” Sanji says into a pillow.
“What redhead?”
“Exactly,” Sanji mutters darkly.
Zoro frowns, then frowns harder at himself for wondering if Sanji actually sounded jealous or if that’s just his brain being poisoned by close proximity.
“Jealousy doesn’t suit you,” he mutters.
Sanji turns his head just enough to glower at him with one eye. “You wouldn’t know what suits me if it was tailored to your face and slapped you with a monogrammed glove.”
“Shame, I was gonna buy you that fan.”
“You—”
Silence.
Zoro grins.
Sanji throws a pillow.
Zoro catches it.
There’s a beat where neither of them says anything. The room is too full of something that isn’t quite tension but isn’t not tension, either.
“Get your ass up,” Zoro says finally. “We’ve got work to do.”
“What, you want to go interrogate goose violin tapestries now?”
“No,” Zoro says, dead serious. “You said someone had something in her cleavage.”
Sanji sits up like a man reborn.
“God, I love it when you talk about tits.”
Zoro throws the pillow back.
---
The next day is worse.
Because now everyone believes them.
Guards nod at them respectfully. The queen’s chief advisor winks at Sanji. A particularly nosy butler whispers to Zoro during breakfast, “It’s rare to see a love so palpable, sir. I hope one day I find a partner who glares at me like I hung the moon and also murdered it.”
Zoro stabs his eggs with existential dread.
Sanji starts walking closer to him in public. Linking their arms. Resting his chin on Zoro’s shoulder while pretending to look at menus. Running his fingers down Zoro’s back when nobody’s looking.
Zoro pretends he doesn’t notice.
He’s great at pretending. So good, in fact, that when Sanji shoves him into a closet to avoid a wandering guard, he doesn’t panic at all.
Nope.
Not even when Sanji lands half in his lap, chest to chest, breath to breath, the tips of their noses brushing as they try very hard not to make noise or movement or sudden, catastrophic declarations of fake marital bliss.
“Don’t breathe so loud,” Sanji whispers, barely audible.
“Don’t exist so loud,” Zoro hisses back.
“Don’t think I won’t bite you right now.”
Zoro’s breath hitches. “Don’t make promises you’re not ready to keep.”
A pause.
Sanji blinks.
Zoro blinks.
Somewhere down the hall, someone drops a tray. Silverware crashes. The guard shouts. Footsteps recede.
Sanji doesn’t move, and neither does Zoro.
“...This is a lot of touching for two people who hate each other,” Sanji mutters, too soft.
Zoro, who has fought marines, pirates, and sea monsters, closes his eyes.
“Yeah,” he says, very quietly. “It is.”
They stay in the closet a little too long, pressed together in the dusty dark, both of them still and silent, like if they move, something irrevocable will happen. Like if they breathe, something irreversible will begin.
Sanji’s knee is wedged between Zoro’s thighs. Zoro’s hand has found the slope of Sanji’s waist, allegedly for balance, but has made no effort to let go. Their foreheads are nearly touching. Their breath mingles.
Sanji says nothing.
Zoro says less.
The silence stretches until it's a third person in the closet, a smug bastard with a clipboard, jotting down notes like: “EXHIBIT A — DENIAL IN HEELS AND HOMICIDE.” The bastard adds a doodle of a sword with a heart drawn around it.
Eventually—eventually—Zoro shifts. Not a lot. Just enough to move the air between them.
Sanji exhales.
It sounds like a confession.
Zoro looks at him. Really looks. The shadows have softened the sharp lines of Sanji’s face—he looks less like an aristocratic bastard and more like a boy who once wanted something. A hand to hold. A place to belong. A face to kiss in the dark because that’s when it matters most.
Zoro wonders what it would be like.
He almost leans in.
Almost.
But then Sanji speaks, too quickly.
“We should get out of here.”
Zoro nods, and lets him go.
The door creaks open. Light spills across the moment, drowns it. Sanji steps out first. He fixes his collar. Runs a hand through his hair like he’s brushing away the thought of almost.
Zoro follows.
Neither of them says a damn thing.
---
The next day is agony.
Everything tastes like that almost.
Breakfast is scrambled eggs and sexual tension. Tea is served with spoonfuls of regret. Even the goose in the courtyard seems to honk in passive-aggressive judgment.
They avoid each other masterfully.
Zoro trains with palace guards. Sanji flirts with maids and glares at flowers. They pass each other in the corridor like ships in a sea of awkward erections and mounting delusions.
At one point, Nami corners Zoro with the fury of a thousand storms and says, “What did you do?”
Zoro blinks at her, blank.
“I saw you last night. Lingering.”
“I didn’t—he didn’t—nothing happened.”
“Oh my god,” Nami breathes. “You idiots are in love.”
Zoro chokes on air. “WE ARE ON A MISSION.”
Nami grins like the Devil himself handed her a clipboard and told her to stir up as much drama as possible. “Right. A mission. That’s why you’re staring at his ass like it’s a religious experience.”
Zoro does not dignify that with a response.
(But she’s not wrong.)
Later, in the ballroom, they’re seated together again. Obligated to dine, laugh, flirt, and act so in love that the surrounding nobles start whispering about scandal and elopement and whether their love story will be adapted into a musical.
Sanji pours Zoro’s wine for him.
Zoro says, “I can pour my own.”
Sanji smiles. “Yeah, but you won’t. You’ll spill it and embarrass us and then I’ll have to pretend I find it endearing instead of barbaric.”
Zoro grunts, takes the glass, and drinks.
Sanji watches his throat move.
The silence between them vibrates.
“About the closet,” Sanji says, too low for anyone to hear.
Zoro tenses.
Sanji doesn’t look at him. “Was it... real?”
Zoro doesn’t answer.
Because he doesn’t know.
He thinks about it all night. Staring at the ceiling. Lying next to Sanji in the massive bed with two feet of wasted space between them and four thousand pillows acting as a no-man’s-land of repressed emotion.
He thinks about it the next morning, when Sanji sleepily stretches, shirt riding up, a sliver of skin showing like it’s a threat.
Thinks about it when Sanji mutters, “You were watching me sleep, weren’t you?”
“Was not.”
“You’re a pervert.”
“You drool.”
“You like it.”
Zoro does not respond. Because he might.
By the next night, the flirting becomes unbearable. To everyone else.
“Darling,” Sanji croons while feeding Zoro a pastry, “your scowl brings out the bloodlust in your cheekbones.”
Zoro, chewing, responds: “If I die from sugar poisoning, you better cry at the funeral.”
“Oh, I’ll cry. I’ll cry into your will.”
“Joke’s on you, I’m leaving everything to the goose.”
The queen herself compliments their devotion. “You must be truly in love,” she says, eyes sharp.
Sanji leans in, drops a kiss to Zoro’s cheek.
Zoro goes rigid for a full three seconds. Then, smoothly, he turns, kisses Sanji’s hand, and murmurs, “Only a fool wouldn’t be.”
The queen swoons.
Sanji chokes on his own soul.
Later, in their room, Sanji stands frozen by the window, hand still faintly tingling.
Zoro stares at the floor like it’s whispering secrets he can’t unhear.
“Why did you say that?” Sanji asks, voice too calm.
“Say what?”
“‘Only a fool wouldn’t be.’”
Zoro shrugs, too casual, like the air’s not suddenly dense. “Seemed like the thing to say.”
Sanji turns and looks at him. Really looks.
Zoro shifts under the weight of it.
“…Are we still pretending?” Sanji asks.
Zoro doesn’t answer.
Because honestly?
He’s not sure anymore. And that scares him more than the thought of facing Mihawk again with one hand tied behind his back and the other wearing a wedding ring.
---
It all comes to a head—like all things inevitably do—with violence.
They sneak into the lower palace. Find the room with the hidden vault. Locate the Log Pose exactly where Robin said it would be—guarded by two deadly statues, a sentient chandelier, and one surprisingly buff butler.
They fight, gloriously and synchronously. Sanji kicks a statue’s head off. Zoro slices through a chandelier mid-fall. The butler goes down wailing something about union protections. They stand, panting, shoulder to shoulder, covered in dust and victory and sexual frustration.
Zoro looks at Sanji. Really looks. Hair mussed, eyes shining, bruised lip. Gorgeous in that devastating, infuriating, his way.
“You okay?” Zoro asks.
Sanji nods, too quick. “You?”
“Fine.”
A beat.
Then Sanji says, “Do something stupid.”
Zoro blinks. “What?”
Sanji steps closer. “Do something irrational. Ill-advised. Completely impractical.”
Zoro frowns. “Like what—”
And then Sanji kisses him. Hard. Like he’s been dying for it. Like he wants to murder him with it. Like he’ll set fire to the whole world if it means Zoro might keep kissing him back.
Zoro kisses him back.
Of course he does.
Of course he does, because he’s not a coward, he’s just stupid.
And when Sanji pulls back, lips swollen, eyes unreadable, he whispers:
“So we’re done pretending?”
Zoro’s voice is low. Honest.
“Yeah.”
Sanji smiles.
It’s radiant.
“I knew you’d crack first.”
Zoro groans. “You’re insufferable.”
“Still kissed me.”
“Still gonna kill you.”
“Wait ‘til the honeymoon suite.”
Zoro pauses, then smirks.
“Challenge accepted.”
Somewhere, far away, the goose honks approvingly.