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You Shouldn't Have Done That

Summary:

After Luffy is crowned as the King of the Pirates, the Straw Hats land on a random island. On the island is a nobleman who kidnaps Luffy, wanting to make her his wife. He believes that no one can stop him, because he foolishly believes that Luffy’s crew are the only ones who would try to rescue her. What he doesn’t know is how many people are gunning for his head the moment the news of Luffy’s kidnapping is published. But the one who makes it through the nobleman’s defenses is the last person anyone would expect, and also the last person anyone who threatens Monkey D. Luffy wishes to face.

Notes:

(See the end of the work for notes.)

Chapter 1: One

Chapter Text

The island looked too clean. 

That was the first thing Nami noticed as the Sunny drifted toward the harbor. The buildings were polished, the streets quiet, the people just a little too stiff in the way they moved. Wealthy islands always had a certain shine to them, but this one felt… curated. 

“Feels creepy,” Usopp muttered, peering through his giggles. “Like… rich-people creepy.” 

“It smells like money,” Nami corrected, eyes already gleaming. “Which means opportunity.” 

“It smells like meat!” Luffy declared. 

Before anyone could stop her, Luffy, Pirate King, emperor of the seas, and absolute menace, vaulted over the railing and onto the dock. 

“Luffy!” several voices shouted at once. 

Too late. 

Sanji crushed his cigarette under his heel. “I’ll go after her.” 

“Sit down,” Zoro said, not even opening his eyes. “She’ll be back.” 

Robin smiled faintly from her seat. “She usually is.” 

There was a pause. 

Then she added, almost absently, “Eventually.” 

<<>><<>><<>><<>>

Luffy didn’t think twice about wandering. 

The town was full of distractions like food stalls, colorful banners, and people staring just a little too long. She grinned at all of it, stretching her arms behind her head as she strolled straight into the busiest street she could find. 

“Hey! Got any meat?” she asked the nearest vendor. 

Moments later, she was already eating. 

That’s how they found her. 

<<>><<>><<>><<>>

From the balcony of an opulent estate overlooking the town, the nobleman watched in stunned silence. 

“...That’s her,” he breathed. 

There was no mistaking it. The straw hat. The carefree posture. The way the crowd seemed to orbit her without even realizing it. 

Monkey D. Luffy. 

The Pirate King. 

His lips slowly curled into a smile. 

“How… fortunate.” 

A servant shifted nervously behind him. “My lord… that woman is--” 

“I know exactly who she is.” 

His gaze sharpened. 

“And she is alone.” 

<<>><<>><<>><<>>

Luffy didn’t notice the shift at first. 

One moment she was laughing, the next the crowd had thinned. The vendor who’d been handing her skewers stepped back with a stiff smile. 

“Hey, where’d everyone go?” she asked, mouth still full. 

“Lady Luffy,” a voice called smoothly. 

She turned. 

A man approached, dressed in finery that screamed wealth and self-importance. He bowed just enough to seem polite, but not enough to suggest equality. 

“I am the lord of this island. It is an honor to welcome you.” 

Luffy blinked. “Oh. Cool.” 

Then she pointed behind him. “You got more food?” 

The nobleman chuckled. “Of course. Please allow me to host you properly.” 

<<>><<>><<>><<>>

The dining hall was massive. 

Gold-trimmed everything. Endless dishes. Enough food to make even Luffy pause in awe for half a second before diving in without hesitation. 

“Woah!!” 

She didn’t question it. She didn’t notice the subtle glances between servants or the guards quietly sealing the exits. 

She didn’t notice the faint clink beneath the table until it was too late. 

Her wrist hit something cold. 

She looked down. “...Huh?” 

Seastone cuffs snapped shut in an instant. 

Her body went slack. 

“Hey--!” she started, but the strength drained out of her limbs before she could react. 

The nobleman stood slowly, watching her with something dangerously close to admiration. 

“Forgive the deception,” he said calmly. “But you are far too valuable to risk… unpredictability.” 

Luffy frowned, trying to move. “That’s annoying.” 

“You should feel honored,” he continued. “You will become my wife.” 

There was a pause. 

“...Nah,” Luffy said. 

<<>><<>><<>><<>>

Back on the Sunny, the mood had shifted. 

“She’s late,” Usopp said. 

“She’s always late,” Zoro replied. 

“She’s too late,” Nami snapped. 

Sanji was already pacing. “I’m going.” 

“I’ll go too--” Chopper started. 

“No,” Robin said gently. 

They all looked at her. 

She had a newspaper in her hands. “I believe,” she said, eyes scanning the headline, “I know exactly where she is.” 

Nami stepped closer. "What do you--” 

She froze. 

The paper slipped slightly in Robin’s grasp, just enough for everyone to see. 

PIRATE KING MONKEY D. LUFFY CAPTURED BY ISLAND NOBILITY. WEDDING TO FOLLOW SOON.” 

It was almost as if the headline was planned in advance. 

For a moment, no one spoke. 

Then, the deck cracked under Zoro’s foot as he stood. 

Sanji’s cigarette fell, forgotten. 

Usopp went pale. “T-That’s a joke, right?” 

Nami’s hands trembled, not with fear, but fury. 

Robin folded the paper neatly. “He has made a fatal mistake.” 

<<>><<>><<>><<>>

The world did not stay quiet. 

It never could, not when Luffy was involved. 

The news spread like wildfire, spread the moment Luffy had walked into the nobleman’s manor. 

Across seas and islands, through underworld channels and Marine headquarters alike. 

Reactions came fast, violent, and inevitable. 

Ships began to move. 

<<>><<>><<>><<>>

Far away from the island, in a place untouched by the rising storm, a newspaper hit the floor. 

Silence followed, heavy and absolute. 

No one spoke. 

No one dared. 

A shadow stood in the center of the room, head bowed just enough to hide his expression. 

Around him, his crew waited, tense, unmoving. 

They didn’t need to see his face. 

They could feel it. The shift. 

The drop in temperature. 

The kind of silence that only came before something irreversible. 

Finally, he moved. 

He uttered a single command, low and controlled. “Set course.” 

No hesitation, no questions. Because everyone in that room understood one thing. 

Someone had just signed their own death sentence.