Chapter Text
Yamato checked herself in the mirror one last time before leaving her house.
The girl with white hair with green tips was wearing a black jacket over a white shirt with a stylized Oguchi-no-Magami design, tight red pants with a white and purple belt, accompanied by quite large bracelets with small spikes.
With a smile, Yamato took a selfie and sent it to her boyfriend. "I'll be there in a couple of hours" the girl assured Ace, who of course seemed quite happy at the message.
If only he knew...
Ace is a very good boyfriend of course, but he had several problems, including low self-esteem, problems with his father, and a tendency to ignore important things (such as other people's feelings), mildly self-destructive tendencies that also affected Yamato to some extent.
-Hey, I'm going to meet Luffy. I'm going to come back late- The girl mentions to her father, who is drinking alcohol and playing cards with his friends, as usual.
-And who is that?- Kaido asks with indifference.
-A 'friend' of my boyfriend, although they are more like brothers- Yamato mentions calmly as she goes to the door and takes her motorcycle, leaving without even receiving a word back from her father (King and Jack seemed a little more attentive, but not too much).
Everything was going well until Yamato was approaching the house of Monkey D. Luffy, her 'brother-in-law'.
The white-haired girl's heart was beating with great emotion, Luffy had that kind of effect on people, gathering many friends and admirers around him because of his confidence, straightforwardness and loyalty (among other things like bravery and such).
In some sense, Luffy was everything that Ace was not. Luffy didn't care who his father was, he had a great ability to read others (as long as they gave him certain clues) and had a clear image of himself.
Yamato at first didn't want to admit it, but shortly after Ace introduced her to his younger brother, she became obsessed with the young man (younger than Ace by 5-6 years, and much younger than her - at 28, Yamato was almost 10 years older than Luffy, 19 at the time-).
-Yamao!-Luffy greets seeing the tall and muscular girl from his balcony.
-It's Yamato!- She promptly insists, laughing a little at Luffy's words. Generally he didn't bother to learn people's names, he only learned his friends names, but with some of them he had 'nicknames' (she was Yamao and Trafalgar was Tra-guy or Torao).
Yamato didn't really care what he called her, especially when soon the energetic Luffy was jumping up to hug her -How are you?- Yamato asks her young friend, while entering his house promptly.
-Good, shishishi!- Luffy replies, not letting go Yamato.
That was another trait of Luffy...he was quite touchy.
The problem was that Luffy was touchy without bad intentions, he didn't think much about sex or perverted things like his friend Sanji, Luffy just stuck to a person like a limpet and didn't let one go very far.
That was how hers had been with her as soon as they met, to some later-jealousy of Ace.
At first Yamato saw this as another one of Luffy's rather adorable features, but then she noticed something... Luffy's member, which wasn't even aroused, rubbing against Yamato's long legs. She felt it through his pants,
At first she wasn't sure about it, but later she had been convinced.
Unlike Ace, Luffy had great manhood.
After a few nights, trying to get off with Ace, she realized that she couldn't get Luffy out of her mind in any way.
Yamato loved Ace, but she had become rather obsessed with his younger brother...
-Hey Luffy, in a few hours I'm going to meet up with your brother, but anyway, you don't mind if I spend a few hours here, do you?- Yamato asks Luffy.
-Of course not!- The straw hat boy affirms with a smile. The girl with white hair and almost animal eyes couldn't help but notice how his head barely reached her breasts...
-Thank you very much- Yamato exclaims taking a seat on Luffy's sofa, who calmly sits next to Yamato for a while, with the intention of watching TV.
That might have been the entire afternoon for Luffy, but then Yamato reached for his straw hat, drawing Luffy's attention.
They both stared at each other for a while, to the confusion of the black-haired man -Are you okay?-
-Yes, I'm just trying on your hat for a moment. How does it look on me?- Yamato asks Luffy, who seems to be convinced that it suits her -Great- The white-haired girl affirms, before taking a picture with Luffy while she was wearing the straw hat.
After a few minutes, Luffy expected Yamato to return his hat to him, but she did something unexpected...
Yamato sat on top of Luffy, taking the dark-haired man's pelvis by surprise -Yamao?- Luffy asks with some bewilderment, the white-haired girl was a tower compared to him (Yamato was simply overwhelmingly tall, probably the result of her father's genes).
Before answering the question, Yamato seemed to play with her fingers for a moment -Tell me, Luffy, have you ever done it with... someone?-
-Do what?- Luffy asks legitimately dismayed, unable to read the situation from the clues Yamato was giving him.
The huge girl seemed a little perplexed by Luffy's innocence, but she was glad that she was apparently the first to take said innocence from him -I'm going to make a competition between you and Ace. But Ace can't find out, okay?-
-Mmm...Okay!- Luffy agreed with a certain sporting spirit.
-Alright, just keep it quiet- Yamato announces, with Luffy smiling determinedly at the girl.
Luffy's confidence faltered for a moment though, as Yamato's finger trailed down from his chest to his abdomen.
The white-haired girl licked her lips as she briefly felt the figure of Luffy's abs, but then from his abdomen she moved to Luffy's crotch, suddenly grabbing the boy's manhood. Luffy let out a surprised groan, but Yamato's other hand silenced him by placing a finger on his lips.
Yamato gulped, once again impressed by Luffy. But they weren't even in the main act yet.
The girl began to remove Luffy's shorts and then his boxers, revealing the still flaccid member of the dark-haired man, whose breathing was becoming a little heavier.
He was so much bigger than Ace, that was all Yamato could think about.
-Okay, you are doing good but we haven't gotten to the best part yet- Yamato insists, leaning back a bit on Luffy. The dark-haired man's face meets Yamato's breasts, making his breath catch for a few moments.
Little moans of lust begin to come from the young man against Yamato's skin and warmth, but she ignored them for a moment, concentrating on moving her hand up and down around Luffy's member.
In a few moments, Yamato watched as the dark-haired man's dick rose fully erect. Rubbing and throbbing against Yamato's belly.
The white-haired girl gasped for a few moments, up close and in the open it was even better than what she had imagined.
Yamato was just a little tormented inside her mind, she was moments away from being unfaithful to Ace... but for a single moment, her father's ideas had won. And that was all she needed at that moment.
The best is truly free, it was the law of nature (survival of the fittest).
And there was a natural instinct within Yamato that told her that if Luffy was better, it was just right, that he and she give themselves to each other.
Yamato proceeded to take off her jacket and shirt, after that she took off her pants, showing a rather fancy lingerie to Luffy.
While Luffy himself consciously didn't give it much thought, his more animalistic subconscious kept him alert and aroused at Yamato's approach, with the almost godlike figure of the woman practically throwing herself into Luffy's arms.
Now without clothes in between, Yamato placed herself on top of Luffy's dick and began to descend on top of it, receiving him with excitement...
She was full, but far from satisfied.
Yamato's fluids began to lubricate Luffy's member, allowing the tall girl to start going up and down the amazing length of the straw hat boy.
Luffy seemed out of his mind for a few moments, mesmerized by how Yamato's breasts bounced in front of his face.
He was adorable to Yamato, her regrets were definitely disappearing little by little, but soon the dark-haired man just eliminated them at once.
Luffy's hands clung to Yamato's sides and he began to suck on the girl's nipples, almost like a hungry baby, but more characterized by lust, than hunger...
Yamato was then in Heaven, feeling how Luffy's fingers clung to her skin and how her lips began to taste her breast (leaving reddened skin and small marks wherever he went).
The boy simply had an innate talent, making every inch of Yamato shiver when he touched just the right spot.
Both let out moans and howls that almost flooded the entire house, empty at the time, luckily for Yamato.
She couldn't hold back much longer, not only climaxing numerous times, but also feeling how Luffy's member practically hit her cervix, setting Yamato's insides on fire -L-Luffy, give me a baby!- The white-haired girl implores, sticking out her tongue for Luffy, who without much thought gives it to her.
As they melt into the kiss, both lovers increase the rhythms and movements of their hips. Going up and down or in circles, clouding Yamato's mind, almost as if each encounter made sparks.
Yamato's request was not random, in her carnal mind, if Luffy was simply superior, he was more worthy than Ace, Luffy's child should grow in Yamato's womb...Besides, the request also had its effect on Luffy.
He didn't think about the consequences or that Yamato was his brother's girlfriend, at that moment they were more like animals, guided by instinct. And every instinct Luffy had motivated him to cum inside Yamato.
Luffy nearly jumped to his feet, lifting the much larger Yamato, shocked at Luffy's strength once again. But she wasn't complaining, her legs wrapped around Luffy's waist and she enjoyed it as he shook every tiny piece of her being.
Finally the straw hat man reached his climax, cumming inside Yamato, until finally only a little of his seed made it to the floor.
Both lovers sighed, Yamato's legs trembled a little before she got into the ground, she then get into her limbs like a dog, to show her great ass to receive Luffy's thrusts once more. The straw hat boy just wasn't going to give Ace any chance to have a baby with Yamato, Luffy had just claimed her earlier...
"Surprise Ace!!!" Yamato sent Ace a photo with a positive pregnancy test.
"!!!" Ace responded, soon sending dozens more messages, but Yamato ignored him for a moment.
The white-haired girl sent the same photo to Luffy "Congratulations, Luffy!" she exclaimed.
"What's that?" Luffy asked in his response message.
"I'll tell you in a few moments, I have to talk to Ace" Yamato mentions...actually Luffy had no idea that it was a pregnancy test, so Yamato had to explain a couple of things to the straw hat boy. But first, she would make sure that Ace 'take responsibility'.