Just to let everyone know, this story is not written by me. The actual author is a Spanish writer named ZGMF-X13A, who gave me his permission to do this. I'm just translating the story for all English readers. At the time I'm doing this, there is an official English one from him, so that those who know how to read in English can read this amazing story.

That's all for now and happy reading!

Prologue: Luffy

This world where we find ourselves now is frankly rather strange but at the same time, it was an ideal world to go on an adventure if one had the courage to do so and the luck to survive in this world although this world seemed like a fantasy world. The truth was that he had a very dark side.

After all in this world, those who were weak did not survive if they said to leave the peaceful places to go where adventure was.

In that place known as the Grand Line, there was a treasure that only the King of the Pirates, Gol D. Roger could obtain and that now all pirates dream of finding it, called the One Piece!

The ones in the search for the One Piece are the more dangerous ones and the more powerful people have appeared. People with immense powers are capable of destroying entire nations on their own or even manipulating nature itself.

However, this story was not about this world itself, but about a specific inhabitant. An inhabitant who since he began his career as a Pirate caused a great impact on this world, something that continued as he advanced and gained companions.

Touring many places and facing many opponents, yet for this world for almost two years, nothing had been heard from that particular Pirate who caused such a stir. Not from him, nor from his companions.

After all, the great tragedy that he suffered when losing that person so important to him made him realize that neither he nor his companions were ready to take on the challenge of the New World, an area even more dangerous than the first half. of Grand Line.

That is why as the Captain of his crew he made the decision that they needed two years to get stronger to be ready for the New World.

After all, if there were guys in the New World as strong as the ones that boy had seen in the war then neither he nor his crew could survive.

There were still three months until the promised day came, but before that time that boy would embark on a little adventure.

-Calm Belt, (Rusukaina Island) -

We are now on an island in the Calm Belt that was south of the Grand Line.

The Calm Belts are two areas located to the north and south of the Grand Line. In those two areas, there are never ocean currents or winds and they are also nests of those huge sea monsters known as Kings of the Sea.

That made them very effective natural barriers to prevent one from simply entering the Grand Line from anywhere and at the same time forcing one to explore the Grand Line from the start.

Among the few islands found in the Calm Belt, we will focus on one called Rusukaina.

Rusukaina was not an easy island for human beings to live on, after all, it had 48 stations that changed weekly.

But it was not only that which made living there a feat, since there were different species of very dangerous animals on the island, some even stronger than several pirates from the first half of the Grand Line. Truly this island was one of those that was not a place where anyone could live since those who tried it simply could not face the cruel and powerful nature.

A long time ago there was a country on that island, however, its inhabitants could not survive in that extreme environment and died leaving behind only ruins as a sign that once there was something there.

Deep down only a person with great determination, great power, and great survival instinct could be in Rusukaina for an extended period of time without dying.

And apparently, incredibly that was the case.

In one of the open fields of the island we can appreciate something a little particular since although in Rusukaina there should be no human life, the smoke emanating from a campfire showed otherwise.

Because from about one year and nine months, a person had started living in Rusukaina. Going from being a boy trying to survive despite not being weak at all, to being the 'Chief of the Island' who had even formed friends with some of the animals.

However thanks to the 'training' that his grandfather subjected him to since he was a child, that boy already had an advantage in knowing how to survive on his own.

Next to that fire was a boy who was eating a HUGE piece of meat. In terms of size, that piece of meat was bigger than a small house, and even so, it was already half bone showing that this boy could really eat a lot.

That boy whose age was probably 19 had short black hair and a scar under his right eye. His clothing consisted of a long-sleeved red four-button jacket which he wore unbuttoned, thus showing his muscular chest. A yellow band was tied around his waist, he also wore blue shorts that reached a little past his knees, and finally sandals for his feet.

Now one thing that should be noted is that his iconic object, his beloved straw hat, he did not wear because during his stay on this island, his 'Pirate' self would take a break and that hat symbolized being a Pirate. He hadn't worn it since he started living on the island.

But what would undoubtedly attract the most attention about his appearance is a scar on his chest.

For that boy, that scar was an indelible memory of the guy who took away the most important person for him on that tragic day when his brother died sacrificing herself to protect him.

That boy's name is Monkey D. Luffy, and he is the Captain of the Straw Hat Pirates, at the same time he has a bounty of 400,000,000 Bellies on his head.

Right now Luffy was eating his favorite food which was meat after having been practicing a bit more with the great power that he had developed living on this island. Apparently, no matter how hard he tried, the time limit of that technique couldn't be avoided.

"Fourth Gear really is powerful but it has a time limit and leaves me exhausted and defenseless for ten minutes," Luffy said to himself between bites as he ate that huge chunk of meat of a giant animal size that I was already half consumed in less than five minutes.

Besides using the Fourth Gear he was also wasting calories and leaving him hungry.

Whether the Fourth Gear could combine the super speed of the Second Gear and the super strength of the Third Gear into one. That made it the most powerful state of him, except that it had its limits that made him unable to use it just like that.

In the end, Luffy understood that the Fourth Gear was an incredible and great power that would allow him to finish a difficult fight where he was even with his opponent. In the end, the costs of the Fourth Gear made it truly a last option if nothing else was left. And if he didn't manage to defeat his opponent after activating the Fourth Gear, then he was finished as he was barely able to move and unable to use Haki for ten minutes, which made him too easy a target.

And if in general, Luffy was an idiot, that could not be denied since over the years he had demonstrated such an idiot.

However, while that was true, one could not deny that in other respects Luffy was a genius. The fighting aspect was one where Luffy could be classified as a genius.

After all, an idiot in the fighting would not have discovered the weakness of someone as powerful as Crocodile on the brink of death, nor would he develop strategies to counteract Enel's 'mantra'. An idiot would not have known how to take advantage of the fact that his body was made of rubber to create the powerful Gears.

As a final test of that intelligence in combat was that Luffy finally managed to perfect his Fourth Gear, after the time in Rukusaina when he realized that to subdue the giant beasts he needed something more, he needed a different body.

With that, it could be said that his training of his Haki had been a success and that he was ready to challenge the New World when the time to leave came.

The days weren't exactly dull either as the wild beasts were more than enough to keep him busy, in fact at the beginning of it all Luffy had quite a bit of difficulty dealing with those beasts.

But

"I wonder how everyone is doing?" Luffy was heard saying that he momentarily stopped eating his meat to look at the night sky.

Normally after eating so much meat, Luffy would end up quite fat for a few hours, but due to how quickly the use of the Fourth Gear consumed his calories he did not get fat this time. Even so, he would need to eat the rest of the meat and rest for a long time to be one hundred percent again.

"They sure have gotten stronger," Luffy smiled at the thought, thinking that everyone would have gotten stronger in the time they've been apart. "I can't wait to see him when we get together." Just thinking of his crew Luffy's spirits always rose.

Luffy still missed his crew more than anything in the world.

"Just a little more..." Luffy said to himself as he held the last piece of meat in his hands. "Now I am strong enough to protect you all." Said the Captain of the Straw Hat Pirates with determination.

He wasn't strong enough to be able to save Ace, that's why he trained hard every day to never feel like that again.

"But I need to be stronger!" And with that, a certain Luffy decided to finish eating meat. After leaving only a huge skeleton, Luffy quickly fell asleep next to the fire.

Tomorrow would be another training day after all.

What Luffy didn't know was that just three months before the promised date to meet the others he would be leaving on a little trip.

-Eostia, (Land of the Dark Elves, Cave) -

And from Rusukaina Island, which was full of very strong life, now we went to a different place, a dark place where life was not abundant.

From those lands, we focus on a cave where the only illumination is a torch.

There we can see that there was only one person, a man whose physical appearance could not be seen due to the fact that his entire body was covered by a white magician's robe.

But even if his appearance could not be seen well, one could tell that this man was in a bad state since the apes could stand while drawing on the ground a magic circle made with his own blood that came from a very deep wound in the stomach.

That man had abandoned his birth name long ago when he decided to learn magic, if anyone wanted to talk to him they should call him the Wizard.

Besides being a great expert when it came to magic since very recently he was also a former member of the group of mercenaries known as the Black Dogs.

But an attempt to try to gain the position of leader cost him everything, including his life since at this rate more than a few minutes should not be left.

That man was not a good person, in fact, he was a despicable guy who would not care if the lives of many were sacrificed in order to satisfy his lust. After all, one didn't join the Black Dogs for fun.

In fact, the only reason why he was mortally wounded in a cave located in these territories was due to his enormous ambition and his contempt for being below others when he believed himself to be the perfect leader.

The idea that a brute like Vault was giving orders to him and that Vault was the king of the wonderful kingdom that would subdue the women of the nation was something totally outrageous!

After all, it was the Wizard who devised strategies and used his magic to avoid losses, and still Vault had to be the leader.

In fact, the Wizard even heard how they planned to rape the Queen of the Dark Elves and her assistant now that they had been captured.

That was the last straw that spilled the glass since the Wizard had seen the beauties that were those two girls and planned to leave them to himself while the others could play with the other Dark Elves of this kingdom.

Even the Seven Warrior Princesses were the same, for the Wizard they were precious jewels that only took place next to him while the brutes of the other members of the Black Dogs could settle for others.

After all the Magician thought that since he was superior to the others he had the right to keep the best while the others kept the 'remains'.

It was thus that a few hours ago he planned the assassination of Vault in order to take the leadership of the Black Dogs. To do so, the Wizard gathered several members, and together with them, they would go to the room where Vault had his throne and there they would kill him.

He told them that everything would be better with him and that his goals would have fewer losses if someone like him was in charge. Apparently, that had worked since all the men of the base accepted and thus they marched towards a Vault that was alone.

However the Wizard miscalculated the fact that Vault had more charisma than him and understood perfectly the wishes of his subordinates, therefore his subordinates would not betray him so easily. The Magician's own arrogance ended up costing him dearly.

So instead of joining him, those guys pretended to have accepted him as the new leader and led him to Vault to declare the Wizard as the new leader to surround him while Vault mocked him for his attempted betrayal.

Naturally, Vault later responded to that attempt to usurp his power ordering an attack on the Wizard, who managed to use a spell to escape but not before receiving a deep cut in his stomach courtesy of Vault's sword.

That is why the term in this lonely cave draws a magic circle with his blood. As final revenge, he planned to make an invocation so that the ideal of Vault and Kuroinu would stay like that a simple ideal so that the last laugh would be his.

In the end, he was a person like that, a person who was scum who would take the most important step for Kuroinu's downfall.

That is why he had drawn a summoning magic circle. For if he couldn't stop Vault himself, then someone else would.

A summoning spell was an extremely rare magic that was said to be able to summon beings from other worlds, the more detailed and more detailed the type of hero one desired the better.

If he was a powerful hero then Vault could definitely be stopped.

That is why the Magician decided to summon someone who had heroic virtues and also great power.

If an Ideal Hero like that showed up then there would be no doubt that Vault could lose.

"Damn Vault. You'll see..." The Wizard spoke with great difficulty due to his serious injuries, even with his healing magic he had only given himself a few more minutes to live instead of being able to save himself. "When this spell ends, your dreams will end alone with it. Powder because if I can't enjoy those women's bodies as the absolute leader then neither you nor any of those ungrateful ones will!" And with that the term of drawing the magic circle with his own blood

And with a last movement, the Magician put his hand in the center of the circle and began to speak an incantation. That caused the circle made of blood to start to glow.

"It was a success." He said with satisfaction even though by this point seeing and hearing was already very difficult.

And so the Magician ended up on the floor of that cave having succumbed to his injuries. But at the same time happy knowing that his last efforts would not be in vain.

But he didn't know that his spell had been incomplete.

Since his vision was blurred due to his bad condition, he did not notice that several details were missing from his magic circle, details that would have ensured the summoning of that Ideal Hero that he wished to summon to have revenge on him.

So instead of looking at all the details, the invocation of him only focused on one of the requirements instead of all: A pure heart and the power to face an army.

That is why what would end up being invoked was.

-World of One Piece, (Rusukaina Island) -

For now, the Captain of the Straw Hats simply slept with complete peace of mind knowing that no beast would come to attack him after having become the head of the island when before he could not sleep peacefully because of those same beasts seeking to eat him while he slept.

And since the season this island was in this week was warm, Luffy could sleep outside without any problem.

But there in what would normally be one more night was where… where a very strange event took place.

In the sky, a huge magic circle appeared over Rusukaina Island. However, since he was asleep Luffy couldn't see her.

That was the result of the Wizard's spell… the incomplete spell that sought to summon a hero to take revenge on those who had betrayed him. A spell capable of transcending time and space to search for what one wanted to be invoked.

Instead of being a noble person looking for a hero to save the world here, it was a rotten person who wanted to summon a hero to get revenge for not having something that he believed he deserved.

But since the summoning method was incomplete the person whom he ended up being chosen was neither nor did he wish to be a hero.

The reason why he ended up appearing near Luffy was because what was most desired was a powerful person with a pure heart. Things that fit Luffy perfectly.

And having found the right person, the magic circle on the island glowed brightly and then vanished.

At the same time that that happened on Rusukaina Island, Monkey D. Luffy had disappeared in an instant. One second he was sleeping and the next he was gone.

Likewise, his beloved straw hat had also disappeared from the island.

And so without anyone except the mighty giant animals of Rusukaina Island knowing about it. Monkey D. Luffy completely vanished from his world.

The place where he had ended up was one where his presence was needed or so the fact that the shooting star had led him was implied.

-Continent of Serenus, (Eostia, Inside a Castle in the Territory of the Dark Elves) -

And now we find ourselves in a different place in the fantastic world where Luffy was.

This was a world not so advanced compared to Luffy's, but this was a world that had experienced a war between the Dark Elves and humans, a war that had lasted a long time.

However, compared to what was to come, that war could even end as a nostalgic memory for some.

Now we focus on a castle located in a part of the territory of the Dark Elves.

This castle was in the territory of the Dark Elves, however, its original occupants ended up dying and the women ended up being used as toys by the mercenaries and monsters that had joined them.

That specific castle had been chosen by the leader of the Black Dogs to serve as the base for his group. There were currently a total of fifty of his men and ten ogres inside while the other members were scattered throughout the territory.

However, what made it stand out was that in addition to the leader of Kuroinu, there was the Queen of the Dark Elves, Olga Discordia, and her assistant and her most trusted subordinate Chloe.

They had been captured by Vault and his group, thus being held as prisoners.

But they had much more sinister intentions.

Vault's true desire was to form his own nation, a nation of service where all women were sex toys for men. His cause was fully supported by his subordinates, but not only they but many monsters had joined his cause as well as various traitors in various parts of Eostia driven by desire.

The capture of Olga was simply the beginning of his plan to invade the other places and thus form his empire and go after the Warrior Princesses, but first Vault decided to enjoy the two beauties that had been captured.

What he did not know was that someone capable of opposing him and a large number of his subordinates were already under the same roof as him without anyone knowing of his existence.

All thanks to the Magician's revenge.

Inside the castle where the queen was imprisoned, we can see a certain boy with black hair sleeping on the ground although the dream of him did not last long since he began to wake up even when barely minutes had passed.

"Hmmm?" A Luffy was heard saying that he had woken up due to feeling that something was wrong.

While Luffy was usually a heavy sleeper who did not wake up easily, this time he had woken up instantly, perhaps it could be said that this time his animal instinct led him to wake up. It also helped a lot that he had not been injured previously since he had only entered Fourth Gear mode to again try to see if it was possible to increase the time limit, so his sleep this time was lighter than when he was leaving. to sleep after being hurt.

"What am I doing indoors?" A confused Luffy wondered since the last thing he remembered was eating his piece of meat and falling asleep under the night sky.

He only slept indoors (In some of the ruins of the civilization that once was in Rusukaina) when the weather was rainy or cold.

Standing up, Luffy looked around and recognized that as inside a castle.

But before asking more questions, Luffy saw a certain object on the ground.

"Ah, my hat," said Luffy who took the hat from him and put it on his head. He may have decided to take a break from being a Pirate but his Straw Hat was still his most prized possession. So he decided to have it with him for now because if this was an unknown place he did not want him to lose the hat.

"Where am I?" He asked himself as he continued to look around. "This is not Rusukaina." And even though he was not the smartest Luffy could have known that thanks to his time on the island.

Clearly, his surroundings were not from that dangerous island known as Rusukaina since Luffy had had enough time during his training to have traveled the entire island and he had never found a castle in such good condition as the one he was on now.

All the vestiges of the civilization that once existed on Rusukaina were simple ruins that were also being preyed upon by nature but that at the same time were still stable enough to give Luffy a roof to sleep under at night when he started to rain.

But a castle like this simply did not exist on that island.

"Where am I?!" Asked a confused Luffy when he found out that he had somehow ended up somewhere else.

That was very bad since if he was on another island he couldn't go back to Rusukaina. Then he wouldn't have a way to go back to Sabaody!

Since that would be where Hancock and his crew would come looking for him and then take him to the place where he and his crew would meet. And Luffy had to admit that he himself would end up lost if he tried to reach Sabaody alone.

So due to his confusing situation, Luffy decided to first see if this castle was abandoned, if there were people then he would ask them for help and if he was abandoned then he would run until he found somewhere with people.

Standing still, the Straw Hat boy began to concentrate on searching for people.

And sure enough, he found something, a person.

"There's a person!" Luffy exclaimed with a smile thinking that this person could help him.

And how could Luffy know that there were people inside that castle despite being alone in a long corridor?

That was simple after all with his Observation Haki he could tell. His training in the three types of Haki had been a success so not only could he use his Armament Haki to fight much better, but also his Observation Haki for situations where he could know where there were more people in case of being lost (As well as clearly helping him dodge attacks).

"If there is anyone here then you can tell me where I am and how to get back to Rusukaina!" And having reached that concussion, Luffy began to run down the great hall in the direction where he felt there were people.

Luffy didn't know that he was running right to where a trapped queen was. A queen who without anyone's help would have suffered a terrible event that would make her lose very important things like her dignity and her purity.

The Queen of the Dark Elves was a very short time away from meeting the boy who wanted to be the King of the Pirates (Even though that title had no meaning in Eostia). A human boy who would make her reconsider his views on human beings.

The fact of having ended up in that castle and not in another place would end up being what would begin the way for the future of this world to reach a different end. All courtesy of a boy who dreamed of being the King of the Pirates.

He could be someone with no interest in romance and in his carnal pleasures, his desire for him in that sense was zero. He lived a thousand times preferring adventures, eating meat, and having fun.

But what he could definitely do was send those who earned his anger flying as a certain leader of a certain group of mercenaries he was soon to discover in person.

Since as has happened many times before and it will continue to happen in the future. The mere presence of Monkey D. Luffy was enough for any kind of plan that harmed innocents to end in failure.

AUTHOR'S NOTES:

And well here is a story with One Piece.

I know this story is unusual, especially since I do a crossover with an H3nt4i. However, I couldn't get this idea out of my head.

I know the way Luffy ended up in Eostia wouldn't be the best, but I think it makes sense of it.

This story was inspired by a Bleach and Kuroinu crossover made by the author Victorarte19.

I know this story couldn't be compared to that story, but at least I hope it's decent.

You see, thanks to that story I found out about the existence of Kuroinu and I decided to investigate and although I didn't like the genre, I saw it until the end. In itself, I clearly don't like how it ended and what happened to the girls, stories like that are not my style. But the girls' design was very good.

Especially stories that have scum like Vault and his come out victorious I dislike. So I decided to make this story where someone enters that world to change things.

In case I knew I needed a powerful character for this task, at first I wanted to use Jaune from RWBY, but I knew that even with all his power the enemies were simply too much for him to do anything. No matter how much I liked Jaune I knew that this story was not his time to shine.

That's why I kept thinking another option was KHR's Tsuna, but I felt that putting him in this world would make him suffer even though it would have been great to see Tsuna helping Kuroinu's downfall and accepting the darkest aspects that a future Mafia must also know when to take lives.

So after thinking about it a lot, I chose Luffy not only because of his power but because of his personality.

As we all know, Luffy is someone with a pure heart who has no sexual desires, but at the same time has enormous determination.

Deep down to Luffy because of his cheerful and lively personality, I see him as a ray of light in this world. Also since his sexual appetite is practically zero (bought when he felt nothing when he saw Hancock naked) he would not cause discontent with the girls.

In other words, another good option was going to be Issei Hyoudo, but a friend made me see that a pervert could not be the best option for this type of story since girls could not trust one.

That is why I felt that Luffy was the best option.

Another reason why this story was born was to see those of Kuroinu suffering and being put in their place. And who is better than Luffy for that job?

In One Piece Luffy has been seen giving what is deserved to characters who have caused great suffering to others (Arlong, Wapol, & Enel) and that is why I saw that he is ideal to deal with the Kuroinu.

In other words, in addition to being strong, Luffy has his Haki to make his fists and kicks even more damaging… not to mention his King's Haki. Deep down I see him as a legitimate candidate to put them in his place since we all know what happens with an angry Luffy.

At the same time, I did not want a character that would end everything with extreme ease (such as Gohan or Aioria de Leo who with an attack can take care of everything) and although Luffy is powerful, his powers are not so at the levels of a god.

I don't know if this story receives any reviews but I hope it does. After all, reviews are the only acknowledgments that authors receive.

I also chose that point in the story (Before the end of his training) because in any other it would have been almost impossible to have Luffy too busy in the story itself or in returning to his crew.

Another possible point is that if it had been before Luffy had embarked on his adventure since there he would have had plenty of time ... but honestly, although Luffy is strong, I do not think he would have made the grade for this story, which a Luffy who already He has mastery of Haki in addition to his Gears and the experience in Grand Line if he can offer, unlike an inexperienced Luffy.

Anyway, that's all, lately, my appreciation of One Piece (The first long series that I followed in Japanese) is coming back and it is together with the Suna Suna no Devil as a result.