Obsidian Desires: Luffy's Dark Harem

Chapter 1: The Bet and the Prize

The air on the Moby Dick was thick with the scent of rum and salt, the deck vibrating with the raucous laughter of the Whitebeard crew. Torches flickered, casting shadows over scarred faces and glinting off tankards as the men reveled in their latest victory. Ace, the fiery commander of the second division, lounged against the railing, a sly grin playing on his lips as the conversation turned to a familiar game of bets and boasts.

'So, Ace, you’re tellin’ us you’ve got someone waitin’ for ya?' Marco, the first division commander, arched a brow, his voice dripping with skepticism. 'A pretty little thing to warm your bed? I call bullshit.'

The crew roared with laughter, clinking mugs in agreement. Ace’s grin only widened as he fished a worn photograph from his pocket, holding it up like a trophy. The image was of Luffy, his wide, innocent eyes and soft, untoned frame captured in a candid moment, lips curled in a pout that could melt steel. The boy was pretty—too pretty for a world as brutal as theirs.

'Meet my boyfriend,' Ace declared, voice laced with possessive pride. 'Straw Hat Luffy. Ain’t he somethin’?'

A hush fell over the group, followed by a chorus of low whistles and hungry murmurs. Teach, lurking in the shadows, licked his lips, his dark eyes glinting with something sinister. Even Whitebeard, seated on his massive throne-like chair, tilted his head, a flicker of interest crossing his weathered face before he masked it with a grunt.

'Boyfriend, huh? You’re a lucky bastard,' Thatch drawled, leaning closer to inspect the photo. 'Looks like a damn angel. Bet he’s tight as hell, ain’t he? You sharin’ or what?'

Ace’s smile turned sharp, a warning edge to it. 'Not a chance. Luffy’s mine. You lot couldn’t handle him even if I did.'

'Oh, come on, don’t be stingy!' another crewmate barked, slamming his mug down. 'A piece like that? Bet his ass is plumper than a ripe peach. I’d give my left arm for a taste.'

'Keep dreamin’,' Ace shot back, pocketing the photo before their greedy eyes could linger too long. He didn’t tell them the truth—how Luffy had only agreed to be his 'boyfriend' after Ace had fucked him senseless, the boy’s pleas for a slower pace met with harder, punishing thrusts until he’d whimpered his consent. Ace kept that dark little secret close, a twisted thrill curling in his gut at the memory of Luffy’s tight, trembling body beneath him.

'Prove it, then,' Marco challenged, smirking. 'Call him. Let’s hear this so-called boyfriend of yours.'

Ace hesitated for only a moment before pulling out his Den Den Mushi, the snail’s eyes blinking as the call connected. The crew fell silent, leaning in as a sleepy, sweet voice crackled through.

'Ace? S’that you?' Luffy mumbled, clearly half-asleep, his tone soft and vulnerable. 'Miss ya… when’re ya comin’ back?'

The crew exchanged looks, jealousy simmering in the air like a storm about to break. Ace’s smirk was triumphant, but his voice was deceptively gentle. 'Soon, baby. Just wanted to hear your voice. Go back to sleep, yeah?'

'M’kay… love ya,' Luffy whispered, the words innocent and unguarded, before the line went dead.

'Holy shit,' Thatch muttered, running a hand through his hair. 'That kid sounds like heaven. Bet he feels even better. You’re hoggin’ a damn treasure, Ace.'

'Back off,' Ace snapped, his tone suddenly cold, fire flickering at his fingertips as a warning. 'Luffy’s mine. You wanna talk about him like that again, I’ll burn your tongue out.'

The tension hung heavy, but the crew backed down, though their eyes still burned with envy. In the corner, Teach’s grin was a predator’s, his mind already spinning with ways to get a piece of the boy who’d captured Ace’s obsession. Whitebeard, silent, watched it all unfold, his own dark curiosity buried deep.

As the night wore on, Ace slipped away to his cabin, the photo of Luffy burning a hole in his pocket. He locked the door, his breath hitching as he pulled out a hidden stash of more… intimate pictures. Luffy, sprawled out, flushed and panting, his plump ass on display in one particularly damning shot. Ace’s cock twitched, already hard as he traced the image with a calloused finger, imagining the boy’s tight heat around him again.

He could almost hear Luffy’s moans, the way he’d gag and whimper under Ace’s rough, unrelenting pace. The memory of Luffy’s sensitive, dripping little body had him sweating, horny as hell, his hand dipping below his waistband as he muttered to himself, 'Soon, baby… I’m gonna wreck you all over again.'

The promise hung in the air, a dark prelude to the storm of desire and possession waiting to crash over Luffy when Ace returned.