Pairings: Futa!Nami x Futa!Robin

Warnings: futanari (girls with dicks), BE, yuri, handjob, anal, cowgirl position, blowjob, genderbending.

Disclaimer: Hello everyone! Some of you may know me from my Fairy Tail fanfiction One of the Girls, or from my failed fifty drabble One Piece fic. Well, I'm back, and with a new lemon series that I will hopefully continue! This fanfic takes place any time before the Enies Lobby Arc, but after the Skypiea Arc. If you want any type of yuri pairing (including genderbent characters and futanari) then just say so in the reviews and I'll consider writing it! But if it's a pairing that isn't among the Straw Hats, it'll only be a one-shot not included in this story. Also, I do not own One Piece.

Chapter 1: Futanari Nami and Robin

Nami hadn't always been a dickgirl, but everything changed when they landed on that damn island.

It seemed normal enough for a deserted jungle island. Lush vegetation choked up everything but the beaches. The air was warm and humid, but not annoyingly so. The sun shone brightly overhead and (something remarkable for the Grand Line) they hadn't had a storm for almost a week. As Luffy put it, this mysterious island simply smelled of adventure.

Everything was normal the first night they stayed at the beach. The island didn't have a name, although several maps did exist of it. This meant that the Straw Hats could name it themselves if they were able to. Nami and the rest of the crew discussed this to great extent. Luffy wanted it to name it "Great Meat Island," because of the wonderful-tasting animals that they caught and cooked from the jungle. They all shot that idea down pretty quickly. Usopp wanted to call it "Captain Usopp's Island," though again everyone else agreed it wasn't that good of a name.

Then Robin decided it should be "Kokku Island," after the fact that it looked strangely like... well, a cock.

As embarrassed as most of the crew (save Luffy, who probably didn't even know what 'cock' was slang for) was, they all agreed it was the best and most logical choice. While the Log Pose set, Nami finished drawing her map and wrote the name down in her neat handwriting.

It all changed after they ate they drank from those weird coconuts.

"Hey, guys!" cried Luffy cheerfully as they all laid out on the beach one day, waiting for the Log Pose to set. (All notes from people who'd been there agreed that it took the Log Pose about a month and a half to reset itself.) The bright-eyed rubber boy had an armful of what looked like coconuts... except they were pink like sakura blossoms. "Look what I found? Think we can eat 'em!?"

Usopp lifted his head off the sand and hummed. "I dunno, Luffy. Those coconuts look really weird."

"You can't even eat coconuts anyway, stupid," muttered Nami with a fond roll of her eyes. "You drink their milk."

"Oh." Luffy's excitement deflated a little, but he perked up again almost immediately. "Well, aren't you thirsty? We can drink it's milk! I wanna drink pink coconut milk!" He bounced over to a certain Marimo, his eyes sparkling with excitement. "Don't you, Zoro!?"

The green-haired swordsman had been sleeping for the past few hours, but he woke up sleepily and raised an eyebrow at the pink coconuts. He grunted, "Mm. Sure. I guess I am kinda thirsty."

Luffy giggled. "Great!" he said happily. "What about you, Chopper?"

The reindeer, who was sunbathing next to Usopp, shook his head apologetically. "Sorry, Luffy, but I'm just not thirsty for any kind of milk," he said, shrugging.

"I wonder if you can make any dishes with the milk," mused Sanji thoughtfully.

"I'll have some." A slender, feminine hand sprouted from Luffy's chest and grabbed a coconut. It tossed the fruit to Robin, who had spoken. "What an interesting color," she murmured. "I wonder if its milk has any special properties."

In the end, all of the Straw Hats ended up drinking the pink coconut's milk, except Chopper. It was intensely flavorful and was the sweetest milk they'd ever tasted. It was rich and laced with mysterious undertones that for some reason created a warm, tickley feeling in Nami's mouth. The sensation wasn't unwelcome, exactly, and she soon realized it was spreading throughout her body, centering around her chest and her crotch. Although it was no later than midday, she found her eyes closing, and she had to fight back sleepiness.

The other Straw Hats seemed to be fairing no better. Even Luffy was yawning and rubbing his eyes, pink chunks of coconut lying at his feet and milk dribbling down his mouth. It was unlike him to get tired so early in the day.

"Strange," yawned Robin. "I seem to be... falling asleep."

Usopp's eyes fluttered shut. "Good night," he mumbled, and promptly dropped into slumber.

Zoro was already snoring away - - no surprise there. Sanji seemed to be fighting his own symptoms of grogginess, although it appeared to be a losing battle.

Nami groaned and shook her head in hopes of waking herself up. "Guys," she said with an effort. "I think there was something in that coco..."

But she didn't get to finish her sentence, because she'd already fallen asleep where she sat on the smooth, white sand.

Waking up seemed to be a lot harder of a process than usual. The busty redhead's head was so fuzzy, and the dark void of sleep was so very welcome. It was like a soft voice whispering in the back of her mind to just return to a nice, warm slumber. Nami yawned and forced her eyes open. Her eyelids were as heavy as wrecking balls.

Bright sunlight beamed straight down at her, and she had to squint. Blinded, she momentarily couldn't see and had to rely on her other senses.

The unfortunate burglar's body felt different. Her chest felt more restricted, as though it were being pressed down with an even heavier weight than it usually was, and her short shorts were incredibly tight. Her crotch was exploding with heat from what felt like someone's hand rubbing it, and she moaned, squirming restlessly.

"Now, now, Nami-san," cooed a sultry, sexy voice above her. "That's no good. I can't pleasure you if you squirm around. Sit tight so your new... package can do its business."

The thief's eyes had finally readjusted to the light, and she stared up groggily. A deliciously cute, raven-haired head smiled back at her seductively. The familiar woman's hand seemed to be doing something to the girl's crotch, and she was completely, gloriously naked.

"R-Robin?" she groaned in some confusion. Her cheeks were tinging red. "What are you doing...? What do you mean, new package?"

The sultry archaeologist puffed her already enormous chest out to make it even bigger. Her light red nipples were swollen and erect. Something warm and long was poking Nami's thigh. Robin breathed, "Well, just look down, sexy. After all, you're such a big girl..."

Nami lifted her head and looked down her body. She was entirely naked - - her clothes had been ripped off her, presumably by Robin, and strewn around the pair. She could now see why her chest felt more restricted: her already very large breasts had ballooned overnight to the size of watermelons. It was a miracle they weren't hurting her back. And although Robin's hand was in the way, she could see why her short shorts (the only article of clothing she was still wearing) were so tight.

Poking out of them was a long, thick, and very aroused dick, already dripping with precum.

Nami stared as Robin stroked the girl-cock with expertise. She choked out, "I have a..."

"A penis," said the older woman with an impossibly sexy smile. Her new dick twitched. "Yes. And I have one as well. You must have felt it poking your thigh - - it seems to be very happy to see you."

"How..."

"I think it was something in the coconut milk," said Robin quickly, squirming a little herself. Her hand increased its pace on Nami's new girl-cock, and she bit back a moan. "Now please be quiet and let me pleasure you. You had quite the morning wood. And after I'm done... I'd like you to do me as well."

"But," Nami tried to protest, biting back a groan as her dick throbbed under the woman's ministrations, "why are we... ng... doing this?"

"We have cocks now. We might as well have fun with them. After all, we don't know if they're permanent changes or not. Besides, I don't see you stopping me."

Robin edged Nami's short shorts down a little farther, and she instinctively rolled her hips up. Robin was blushing a little, but she seemed perfectly fine with the prospect of having fun with their new appendages. And her hand was like was a gift from heaven - - it was making Nami's adulthood so incredibly hot! As the archaeologist's other hand slipped her shorts and panties down her legs, the redhead's cock stuck up more and more. It was filled with such pleasure Nami thought it was going to explode.

She could hardly hold back her moans any longer. Her breath was coming in shaky pants, and a desperate want for more was rising in her shaft. Robin's soft, dainty fingers, stroked that warm and meaty cock so carefully, teasing its head and arousing it to no end.

Finally, Nami allowed herself to shout out her pleasure, and warm dick milk sprayed all over Robin.

"Mm," said the raven-haired seductress with a knowing grin. She licked her lips slowly, savoring the flavor of Nami's love juices. "You're very tasty, Nami-san," she whispered tantalizingly.

The navigator groaned. "Okay, let me do you," she hissed. Robin grinned wider and stood up so she was lording her long, thick dick over Nami's face. It was huge and throbbing as hard as Nami's had been. Just looking at it was enough to make the redhead's own girl-cock get excited again.

Nami sat up on her knees, her meat shaft twitching, and wrapped her hands around Robin's wide waist. She grasped her lover's perfectly round ass and grinned as she massaged it. The woman let out an appreciative mewl and her dick stuck straight out. Nami blushed and opened her mouth and ran her tongue across the shaft lightly. Then, as she got to the top, she kissed Robin's dick-head fleetingly.

The woman shuddered. "Don't tease me, Nami-san," she pleaded. "I need your lips around my slutty cock. Please."

"Alright." Nami breathed tantalizingly on Robin's cock head, and the older pirate moaned with need. Smiling, Nami descended upon the shaft. It slid to the back of her throat surprisingly easily, and tasted both sweet and sour. It was a taste she could definitely want more of. Nami bobbed her head around Robin's dick and groped her ass, and soon she was shaking on her feet. The busty cat burglar swirled her warm, wet tongue around the naughty female penis occupying her mouth, and Robin moaned.

"Nami-san, your mouth is so good," she hissed, quivering. Her dick twitched in Nami's mouth. "I think I'm going to... I think I'm going to cum."

The redhead teased Robin even more by trailing a finger down to her pussy, which both girls still had despite now owning sex-needing cocks. This was simply too much for the woman, and with a scream of pleasure her dick shot thick cum down Nami's welcoming throat.

Nami grinned slyly as she pulled off of Robin's new dick. "You taste even better than Sanji's cooking," she cooed. Then, noticing Robin still wasn't quite soft yet, she turned over and stuck her ass up at the woman. "Ne, won't you give me more of your naughty dick milk?"

"Of course," Robin sighed appreciatively, and without having to be told twice, entered her navigator's tight ass.

It was like Nami's butt was trying to squeeze out everything Robin had. She was so tight that the archaeologist found herself moaning again as soon as she entered. It was so hot that Robin's dick was almost screaming with pleasure. She quickly struck up a fast rhythm. She pounded Nami's ass so hard that the sexy teen was soon a wet mess.

Robin gave Nami's butt cheeks a gently bit firm spank. "You love this, don't you, Nami-san?" she said, her voice teeming with sex. "You love being filled up by another girl's cock. Just look at your dick - - it's so hard. It must be almost painful, isn't it?"

"Y-Yes!" Nami exclaimed, her entire body rocking with the pace Robin had set. "More! Fuck me harder! Give my dirty ass all of your cum!"

Robin moaned. "As you wish. NAMI-SAN!"

Shouting the navigator's name to the heavens, Robin's dick twitched and she ascended into an orgasm that felt simply out of this world. It made her head spin as her thick juices were ejaculated into Nami's amazing ass. Both girl's moaned. Robin's climax had had a domino effect on Nami, whose own dick was wetting the sand with thick, white girl-cum.

It felt like they were on the top of the world. Their heads were fuzzy, and their entire bodies were hot. Robin continued pumping into Nami's ass, mentally willing the sweet sexual relief to continue as long as possible. Indeed, it lasted for what could have been hours, although it was actually only a few minutes. When they finally came down from the unparalleled high, they were left shivering despite the sun on their backs.

Robin finally pulled out of her lover and collapsed to the sand, her dick covered in its own milk.

"Say..." murmured Nami as Robin lay next to her, pert nipples pressing against her arm. "I wonder if something happened to the guys, too."

Nami and Robin looked to where the boys lay. They were all still asleep... although they weren't exactly boys anymore. Actually, it appeared that they had all turned into incredibly cute girls

Where Luffy had been was a big-breasted cutie who was completely naked. Long dark hair flowed down her shoulders and back, reminiscent of Robin's. Her breasts were almost as large as Nami's now was, and they had pink nipples that looked delicious. She had a glistening pink pussy that almost called to them to eat it out. Beside her was a green-haired tomboy whose own medium-sized breasts jiggled as she breathed in her sleep. The most attractive thing about the clearly feminized Zoro was her impossibly big ass. Just the sight of it made Nami's dick threaten to harden again.

Usopp and Sanji had been transformed in a similar fashion. Usopp now had a chest that was a little larger than Zoro's but smaller than Luffy's, and an abnormally large clit. Sanji had a much cuter face than usual and her eyebrow had lost its curliness. Her own ass was not exactly flat, but not exactly large either, although her breasts looked like they could possibly lactate.

Chopper was the only one who had been spared the genderbending, and they were completely uninterested in him as a possible lover anyway.

"Wow," murmured Robin. "They look... scrumptious."

Nami's eyes locked with the archaeologist. "Wanna give them a waking up present?" she said teasingly.

From the way the woman's cock stood at attention, Nami figured she did.

They both grinned at each other, anticipating the steamy times that were soon to come.

There you go, guys! The first chapter is finished at last! I hope you all had an enjoyable time reading this. You should check out some of my other fanfics if you did. Don't forget to follow and favorite "Don't Cross the Streams" so you can be updated whenever I post a new chapter, and leave a review! If you want, you can say who you want the girls to pleasure next, and I'll consider it. (Please do not say Chopper, though, as he will not be taking part in any of these lemons.)

-Lemony Yuri Snicket