It was close to midnight on the clock when Luffy stepped out of the Boys' Cabin in the Sunny. He knew what he needed, or rather who, and knew where to find her. Sensing her presence and her feelings through his Observation, he slowly stepped up the main staircase in the deck, heading for the Main Cabin of the Sunny. He smiled inward. You're on, Zoro. Once he was in the upper deck, he took a right and started moving, the only light lighting the way being that of the full moon.

He approached the door slowly and silently, but (he knew) not unperceived. And sure enough, a familiar voice came from inside the darkness of the cabin.

"Oh, hello there, Captain" said Robin, slowly coming out of the shadows.

"Robin!" responded Luffy, smiling widely. "Found you!"

She smiled back, slightly inclining her head sideways. "Of course you did, Luffy. I'm on the night's watch on Thursdays, as you should know," she explained. "Though you probably don't remember that and just used your Color of Observation. I've felt a… tingle."

Luffy nodded and laughed before putting his hands behind his head. "Yeah, you're right. Well, I'm glad I've found you, 'cause I… hum…"

Robin nodded, her whole demeanor becoming serious. "What is it, Luffy?" she asked with a concerning tone. She'd never seen Luffy stuttering with anything other than his terrible lying skills.

Luffy put on the best conflicted face he could. "Chopper is already asleep, and you're the only one awake, so I thought you might be able to help me."

"With what?" she asked, automatically scanning him for any apparent injuries.

"With this," he said, getting her left hand into his right and guiding it to his hardened member. Robin's eyes widened slightly. "It's been hard for quite some time now, ever since I woke up, and I don't know what to do. It's starting to hurt a little. What is wrong with me? Should I wake up Chopper?" he asked, trying his best to sound innocent.

Robin's gaze softened as she heard Luffy's explanation and, as he let go of her hand, she didn't remove hers from the huge bulge on his shorts. She smiled, and had an impenetrable look in her eyes. "I… see. So, you woke up like this…" she squeezed his member slightly as she said that last word, causing Luffy to moan, "and was worried about what it could be?"

"W-What could it b-be?" He stuttered as she gave another good squeeze, now in his balls.

"I wonder…" Robin whispered, with a playful smile. "It could be fatal, no doubt."

"W-What? Really? But…. that just now… it felt so good. What you did, I mean…" moaned Luffy, as Robin continued caressing him over his shorts.

She chuckled, coming closer to him, and Luffy could see a glint of amusement in her eyes. "Don't worry, Luffy. You should be fine," said Robin. She stood in front of him, then leaned into his ear and whispered, "I can help you."

"Then help me, please," muttered Luffy into her own ear, his mouth slightly dry.

"Aye, Captain…" She slowly moved back, her lips brushing from his earlobe to his mouth, her eyes searching inside his, while her hands intertwined into the locks on the back of his hair. And then, on instinct, Luffy kissed her.

Robin's eyes widened, surprised with his change of pace. Luffy kept his lips there for some seconds, slowly opening his eyes as he let go of her lower lip. He stood there, a couple of centimeters away; he didn't even remember his hands being drawn to her hip and nape of her neck.

"I'm sorry, Robin… my instincts… they're telling me to…" he trailed off breathless, his eyes darting to her lips again. Robin was flushed, her eyes partially closed with a lustful sparkle.

"Whatever you want… I do as you command, Captain." She whispered that last work to his earlobe, before licking it. Then, she pulled him inside the dark cabin grabbing him by his vests.

Once inside, she threw him against the wall unceremoniously and started kissing him senseless, knocking his hat out of his head. Luffy kissed her back, holding her tightly against his chest; he was pressing his left knee in between her legs, through her silky, midnight-blue dress, while she pulled him through his nape, bristling his hair. His hands started on her hips, but Luffy hastily moved them downwards.

"Is this okay?" he asked, while his strong hands squeezed her buttocks. Robin pressed him harder against the wall, demanding entrance with her tongue into his mouth. Luffy took that as a 'yes', and decided not to talk anymore.

Robin was amazing, thought Luffy, and her experience was easily shown. Her hands descended down his chest, where she started caressing his muscles and teasing him.

Luffy decided that it was time to enter her game; he caged her body with his hands, holding fiercely, and spun with her so that she was the one against the wall. They stumbled against it with their bodies glued, and then Luffy got hold of her right tight, lifting it to his side while kissing Robin's neck, her face framed by his left hand, his thumb into her mouth. He felt her tightening her grip on him, and a little, almost inaudible moan escaped her throat. She grabbed his erect member with her right hand, massaging it over his shorts, finally tearing a moan from her captain as well.

Then, using her powers to get a hold of him by the back, she spun them again, stumbling against a table and knocking down some books to the ground. Their snogging became more ravish; she almost ripped his shirt off, savagely scratching her nails down his back. It didn't hurt, since he was rubber, and she was prepared to take every advantage of that fact right there and then.

Luffy let his shirt fall to his feet, then took Robin by her tights and lifted her with ease. She tangled her arms behind the back of his neck, while he shoved her up the table. Her legs were crossed just above his ass, and his erection was now perfectly positioned against her warmth.

His hands got hold of the straps of her dress, and in a swift motion, pulled them down, unveiling her round breasts. Luffy kept kissing her fiercely, feeling the hot and silky sensation of her exposed skin against his own chest. Then, he pushed her over the table, exposing her breasts and adjusting it in order to have free access. Making a path of kisses and licks, he began descending with his mouth, from her neck to her left nipple.

He captured her nipple, sucking it gently, while massaging both her breasts with his hands. She was moaning lowly and involuntarily; guiding him with her fingers interlaced behind his hair, she was using her power to support her leaned position while rubbing her lower body against his bulge. Luffy alternated between sucking her left and right nipples, eventually letting her suck on his thumb, which only made him harder.

He couldn't hold back anymore. He let his shorts fall down, then he lifted the skirt of her dress until he could see her little, black panties.

"I'm going to taste you," he whispered against her mouth. She was trembling with lust. She couldn't believe what was happening. But there was not much time to think about it, as Luffy pulled her panties sideways and began to lick and suck her pussy all the way, while fingering her with his thumb.

"Oh my God, Luffy –" she moaned, her hands pulling him by the back of his head into her legs. He is so good. So good, in fact, that she seriously started to doubt this was the first time he was doing this. She had just concluded that line of thought when he started to gently suck her clit while fingering her upwards in a very specific spot, causing her to blurt out a loud "Fuck!".

This was surreal. Half her brain had short-circuited, and the other one could only form a single thought. It's like he knows exactly where and what excites me. Almost as if he was familiar with her body. Was he naturally gifted? Or was it some form of Advanced Observation? But it was futile to try and understand, and she focused all of her energy into not screaming as she came for the first time that night. He didn't flinch, moving his head along with her and keeping his lips glued to her clit while she twitched involuntarily.

"You taste so good, Robin…" he murmured under her skirt, causing her to blush deeply. "I think I can't hold it anymore."

"Luffy —" she moaned with closed eyes. She could feel her whole body burning, from her cheeks down to her core. "I need you," she breathed in a pleading tone.

She opened her eyes slightly, just enough for her to see Luffy eyeing her with a look she'd never seen in his face before. His eyes were drowned in unabashed lust, his cheeks were reddened and his characteristic smile was gone; instead, he licked his own lips, savoring her taste before biting his lip in anticipation, scanning her from head to toe. If she wasn't already wet, just looking at his face right now would have made her dehydrate. It was an expression that said it quite clearly: she was about to be fucked by her captain. Hard. Fucked by Luffy. And she could hardly wait.

"Plead me," he muttered. His tone was deep, hot and commanding. It was an order. Almost as if he was testing her to see if she would oblige. It made her shiver involuntarily, while holding his gaze. Somewhere in his voice, she could still feel the lust escaping through, betraying his teasing attempt, but it only made it better. She'd always fantasized about it, but never thought she would really see her daring, handsome, hot Captain commanding her to fuck him. She loved it.

"Please Luffy," she whispered. "Fuck me."

Luffy sustained her gaze as he positioned himself into her entrance. Without another single word, he slowly but firmly thrusted into her warmth. She gasped and pressed her fingers against the edges of the table. Luffy took both her tights with his arms, suspending them, and started thrusting slowly. Robin tightened and bit her wrist, resisting the urge to moan loudly.

"Fuck, Robin… you're so hot inside…" he muttered, and she tightened again as she listened to her captain using words she didn't even know he knew. She was on the verge of losing control. Luffy intensified his pace, now fully thrusting into her. The table was trembling with each plunge Luffy made. Biting harder into her wrist, Robin used her powers to cushion the table against the wall, before someone woke up to the rattling sounds they were making.

"Luffy – ah! – t-the others – they'll…!" she stuttered while Luffy pounded into her.

Luffy's response to this was to pull Robin up into his arms, making her sit at the edge of the table. He enveloped her legs behind him, over his butt, then started thrusting into her again, this time sucking and groping her nipples while she hugged the back of his head into her chest. "Do you like being… "fucked", that's the word, right? Do you like being fucked like this? Tell me, Robin…" he commanded while sucking her left nipple.

She gasped and shoved her face into his hair, now moaning loudly. "Yes... ah! — I-I love it like that — fuck me, Luffy!"she muffled her scream into her hands. It felt impossibly good. Luffy made a mission to explore every single inch of her body with his hands, squeezing her skin firmly.

"Robin…" Luffy moaned, suddenly gripping harder. "Soon… I'm gonna… where d-do you want it?"

"Wherever… do as you please, Luffy…!" she answered, her rational brain now long forgotten, as she was also going to cum. She would do everything he commanded. She couldn't believe what she was doing or saying.

But he suddenly stopped. Robin eyed him expectantly, trying to understand his motives. "Don't worry, I'm on the pill so —"

But she was wrong, as Luffy's halt had nothing to do with this kind of worries. She was cut off by her captain when he threw her upper body back to the table unceremoniously. He then locked his hands just under her tights and spun her on the table, so that now she was bent over it, facing away from him, her high-heels touching the ground. He was going to finish her off doggy-style.

She couldn't see him, so she was surprised when he got both her wrists and pulled her slightly back. He crossed her arms and held them both with one of his hands, while with the other he lifted her skirt over.

"God, what a vision…" he mumbled, making her shiver. She was rattled back and forth when he thrusted into her once again, now reaching deeper, her breasts cushioning her body as her wrists were firmly held by Luffy just above her ass. "I can smell your arousal, Robin…"

She moaned and sobbed, overcome with embarrassment and pleasure. She gasped loudly when she felt his thumb caressing her other hole…

Still gripping her wrists with one hand, he suddenly caught her nape with his free hand, holding her still while he intensified to the absolute maximum.

"Oh my G-God…" was all she could say.

"Inside you… I'm cumming inside you…" he muttered, before increasing the pace once again, their sweaty bodies glued. "Robin… Robin…!" the urgency and the way he was calling her name were the final straw.

"Luffy…! Ah…! Luffy!" they came in one entangled mix of moans, arms and trembles. Luffy stood inside her, his member twitching deliciously deep.

After what felt like an eternity, he raised her up by her stomach, and without taking it out of her, he kissed her cheek and caressed her hair.

"That was amazing, Robin…" he whispered, for his voice was gone. Robin smirked, before pecking his lips.

"Aye, Captain..."