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“Zoro-kun’s so quiet,” Hiyori remarks offhandedly, gazing into the fire that illuminates their party. Luffy doesn't know her too well other than what Zoro’s told him, which isn't much. He's also pretty sure the doe-eyed princess has a thing for Zoro, which makes him laugh more than it makes him mad.
It’s not like Zoro’s interested in women. That’s something they have in common- although Luffy, unlike Zoro, isn’t interested in men either. But it doesn’t matter. Even if Zoro likes guys, he only loves Luffy.
So when Luffy heard from Brook about how he’d found Hiyori and Zoro sleeping together in that run-down shack, he wasn’t too upset. She got to lay next to him, sure, but Luffy got to lay with him every night. And they didn’t just sleep side by side, either. They did stuff.
That’s why what she says doesn’t come as a surprise. Zoro’s so quiet. Hiyori, bless her heart, couldn’t be more clueless. Because Luffy knows that Roronoa Zoro is, if nothing else, a loud, loud man.
His crew knows that, too, although maybe not in the same way. They’ve all seen Zoro yelling his head off at Sanji, shouting in fear of Chopper and his medical examinations, or pleading with Robin for the key to the alcohol cabinet.
On some rare nights, when Zoro’s real tipsy, he'll even talk about his life. About his childhood, where he grew up. How he lived before he met Luffy.
This usually only happens when they're alone, which makes Luffy happy. He's selfish when it comes to a lot of things, like meat and treasure, but he's especially selfish when it comes to Zoro.
Knowing that Zoro’s innermost thoughts and feelings are secrets he shares only with Luffy makes him giddy. It's a display of trust, of his willingness to submit his mind and body to his captain under any circumstance. Zoro’s too dumb to be able to hide anything from his captain, but smart enough to know not to try. Luffy liked that, liked his dumb, silly swordsman.
But those late night conversations and whispered confessions are not what makes Roronoa Zoro a loud man in his eyes.
It's not his words, really. It's his sounds, the guttural, animalistic litany of noises only Luffy can tempt out of Zoro’s shy mouth, the sounds only Luffy gets to hear, the sounds only Luffy gets to swallow when he kisses Zoro.
“Ooh, oh!” is one of his personal favorites. Zoro gasps it in the same tone every time Luffy slides his dick home, even though they must've fucked hundreds of times by now. It’s his favorite part, Luffy thinks, whether he decides to be nice and let Zoro adjust to his cock, or if he decides to be mean and slam it all the way inside to make Zoro cry.
“It's so big,” Zoro always moans immediately afterward, and Luffy always laughs and leans down to kiss him. He can make his dick bigger, but he doesn’t usually need to. Zoro, for all his big talk, comes apart like putty when Luffy’s inside him. There’s a squelch as Luffy gyrates his hips, pressing his cock farther inside.
That’s not technically a noise Zoro makes with his voice, but Luffy likes the wet sound as he opens Zoro up, feeling the tight heat stretch and accommodate his length. No matter how many times Luffy fucks him, Zoro’s always tight as sin. Maybe he’s the one who’s rubber.
Another one of Luffy’s favorites is the noise Zoro makes when he’s got him on all fours, back arched and ass clapping against Luffy’s hips. It goes like this: “Ah– ah!”
It's halfway between a whimper and a moan, and it never fails to make his cock twitch. Sometimes, Luffy grabs Zoro by the roots of his pretty green hair and forces his head backwards so he can spit into Zoro’s mouth. Even as he does it, even as Zoro’s swallowing his captain’s spit like a good little bitch, Zoro’s repeating that sexy noise- “Ah- ah!”
Zoro’s so loud, he even makes noise with his mouth full. All that practice with swords has honed Roronoa Zoro into a cock-sucking machine, and he takes Luffy’s girthy cock to the base without hesitation. Mouth stuffed with dick or not, Zoro’s making the lewdest noises as he sucks Luffy’s cock like it’s the best thing he’s ever tasted. He slurps and whimpers and whines through his nose as he bobs his head on Luffy’s dick until it’s practically dripping with spit and precum. He practically gargles his balls.
“Mmm… haah… mmph!” That last part is because Luffy always loses control and reaches out to hold Zoro’s head in place to start fucking it properly. Zoro always chokes a little, but they both know he likes it. A weird mixture of spit and tears and precum starts dripping down the swordsman’s chin, easing the slap of Luffy’s balls against it.
But if Luffy really had to pick, his absolute favorite noise would be the one Zoro makes when he’s coming. That’s why Luffy loves missionary, loves folding his swordsman over and fucking him deep, because that way he can hear and see Zoro so much better. He makes the best faces, tongue lolling out of his mouth, eye rolling back in his head, tears streaming down his face, cheeks red and flushed. The sound he makes is different every time– sometimes it’s a squeal, so girlish it makes Luffy come on the spot. Sometimes it’s a gasping breath, sometimes it’s a pinched moan, sometimes it’s an erotic scream.
God, Zoro is so sexy. So strong and so perfect and so loyal. And so, so loud.
“Yes, yes, fuck, yes!”
“Ngh, nya~!”
“Guh, guh, un, ah, ah–”
“Captain! Captain, I’m coming–”
“Oh, I can’t take it, please–”
“Luffy?” Hiyori says, looking at him quizzically.
“Sorry, Happy,” Luffy replies. Happy? Hammock? Whatever her name was. “I was just thinking about something else.”
“You looked happy,” Hiyori smiles. “Thinking of someone?”
“Something like that,” Luffy grins.
Hiyori and Nami and Law and everyone else can say whatever they want about his swordsman. They’ll never touch Zoro the way Luffy does. They’ll never get to hear Zoro the way Luffy does. They’ll never feel Zoro the way Luffy does.
Because everything about Zoro, his body, his soul, his mind, his voice– it belongs to his captain. There’s no part of him that doesn’t have Luffy’s name on it.
Roronoa Zoro is property of Monkey D. Luffy, future Pirate King. And they both know it.