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Zoro is technically on watch.
But he doesn’t have to be looking to know they are safe, and there are no dangers on the horizon. Besides, with Luffy sitting on the rail, nothing would dare attack them. There’s not a Sea King that would take one look at his aura and think this ship is one to bring down. They’re too smart. Beasts know what a true predator looks like.
Because that’s what his captain is. Smiles and laughter and goofy and ridiculous, but a predator through and through.
Zoro knows it, too.
“Zoro’s thinking too much,” Luffy says, low, still smiling, but one hand lazily carding through Zoro’s hair, fingers scraping his scalp, guiding with slight pressure. Deeper here, back again, all of it, now just the tip.
Zoro shivers, closes his eyes, lets his mouth obey the silent commands. His tongue works. Luffy dribbles over it, down his throat. He’s hard, but not hard, that weird in-between state of eager but satisfied. He could sit like this all night, moon on his shoulders, Zoro’s mouth on his cock, and Luffy’d be happy either way.
Luffy tugs his hair, twists it around his finger before it springs free, too short for a proper tangle. His scalp stings.
“What’re you thinking?” Luffy asks, and that’s permission.
“You,” Zoro says. It’s as easy to talk around a cock as it is the hilt of Wado, but Luffy bucks at just the right moment to make his throat spasm.
Zoro glares; Luffy laughs.
“Why?” He tips his head back, looks up at the cloudless night, wind threatening to tear away his straw hat before he plants his free hand on top of it.
Zoro pulls off Luffy’s cock with an audible slurp, his hand replacing his mouth. Stroke, tug, pull. Just enough that it passes the uncanny valley. Yeah, Luffy’s dick stretches, and it’ll never not be weird, but a little pull, and Luffy’s toes curl, his breath hitches. His nostrils flare.
His smile grows, and the predator within Zoro snarls. It feels like a challenge, but Zoro doesn’t give in. He gets his shoulders between Luffy’s thighs, leans in to press a kiss to Luffy’s bared stomach, laves a hot lick over it.
“Am I not supposed to?” he asks as he thumbs over the wet head, and Luffy shivers.
Luffy’s ankles hook behind his back. Twist over each other into little knots actually, and Zoro can’t go anywhere. Not that he wants to.
“Nah. Zoro can do whatever he wants,” Lufy says, almost sing-song. He leans a bit further back, almost dangerously so, forcing Zoro to bear more of his weight. To anchor him. As if Zoro would ever let him fall.
“Oh, can I?” Zoro drags his mouth up further, further, but before he can get too far, fingers push him back down, back to his knees, until his cheek rubs up against the head of Luffy’s dick.
“You weren’t done,” Zoro’s captain complains.
Zoro chuckles, and turns his head, presses a kiss to the tip of Luffy’s cock. Licks away a blurt of pre. Pulls it into a stretch that will never not be a little weird as Luffy’s heels dig into his lower spine.
“Make up your mind, captain,” he says. He rubs his cheek over Luffy’s dick, up and down, up and down, close to his mouth and yet, so far. It’s a tease; Zoro knows it is.
A gust of wind yanks at the hat, forcing it off his head, though it’s caught by the string, making it hang loose against his back. Luffy’s mouth forms a pout, but his eyes glitter in the moonlight.
“Zoro should want what I want,” Luffy says, low, like a plea, but it’s not. There’s a command underneath.
Zoro’s been hard for an hour now, so hard it practically hurts, and what he wants is to bend his captain over the railing until Luffy howls and everything in a thirty mile radius flees for safety. Course, he also wants to take Luffy into his throat until Luffy spills and gasps and shudders and breaks another piece of the railing.
Franky’ll be pissed, but it’s worth it, for the way Luffy laughs and laughs.
Zoro presses a kiss to Luff’s abdomen, right above the base of his cock. He drags his open mouth up the length, until pre smears over his lips.
“Aye, Captain,” he says, and Luffy’s eyes go predator-dark right before Zoro sucks him down, into his throat, and Luffy’s hands clamp around his head like a vise.
Zoro is technically on watch, but he only has eyes for his captain, as Luffy fucks his throat and holds him in place, and Zoro bends the knee for the only predator more dangerous than himself.
This, too, is devotion.