disclaimer: i do not own one piece
Fighter Au
Luffy has been in many fights all his life most of those fights happens because many people believe that he was a weakling with no fighting abilities only to be surprised by his strength that was compared to the strongest late fighter in the world known as the king, even participate in some fights that were selected by his friends (the Strawhats) to have some fun once in a while in both the ring and the underworld (in the underworld he is call the emperor) and every time he was the winner, he even met some strong fighters that earn his respects and became friends after they battle together. One day he participated in a back alley with some punks to protect two women: one was a olive skinned woman with long slightly wavy brown hair and the other was a young woman with pink braided hair, after dealing with the punks the two women were so impressed with his fighting potential that they give Luffy a presentation card with a direction on it saying that they will make sure that his potential won't be wasted and as a sign of gratitude they gave him a kiss on each cheek before leaving, after they leave Luffy keeps the presentation card because he believed that it will somehow change his luck for the better.
A few days later while doing his usual stroll around the city Luffy receives a call from one of his friends saying that some people were looking for him and they are waiting him in Going Merry Go bar (the usual meeting place of Luffy and his friends) so he decided to go to the place ready for a fight. When Luffy arrives to the bar he could see the two women that Luffy saved a few days ago drinking tea in the bar alongside a tall muscular man with a scar on his forehead and a missing leg and a woman like the pink haired one except that her color hair was darker. When Luffy enter the bar, he sits on the table in which the group are sitting and starts talking to them.
The two ladies and the man presented themselves as Kyros, Scarlett, Viola and Rebecca and they wanted to hire Luffy for the sake of their family and city, they told Luffy that their were a part of the Riku family and that Viola's father was the president of Dressrosa a city known for its jovial and loyal behavior towards but about ten years ago the calamity knock the door of the city when Donquixote Doflamingo a cruel and twisted man take over the city using dirty tricks to take the power for himself. They also told Luffy that Doflamingo is having a fighting competition to amuse himself with the carnage by looking the fighters struggle until they could win against the Donquixote fighters because if the Donquixote family were to be entirely defeated he would give Dressrora back to the Riku family, but none of the warriors that stepped into the arena ends up being defeated or dead with only exception being Kyros because this year he have taken two victories against Doflamingo by defeating two of his fighters Diamante and Buffalo. So, with that problem they want to hire Luffy as their fighter to stop for good that devil and to return Dressrosa to what it was originally, Luffy agrees to help them if they accept his condition of including some of his friends in the fight a condition they accepted gladly.
A few days later when Luffy and the straw hats alongside their Trafalgar Law arrive to Dressrosa they are led to a secret hideout for the Riku family in which they would prepare for the fight, in the hideout Luffy and his group met with Scarlett and Viola's father and Rebecca's grandfather: Riku Doldo III, appreciate the help that the straw hats were giving him and his family and promises them that if they end up victorious he will give them whatever they want making the straw hats agreed with that. Scarlett told Luffy that the next competition will take place in a week and that Doflamingo will participate in the final round which would give them time to prepare for the competition and to face the Devil known as Doflamingo properly. During the week before the competition Luffy and his team spend most of their time training to beat the officers of the Donquixote family executives, they also met with the Riku family's allies led by "Warrior" Leo the Tontattas a group of dwarves warriors that were at services of the Riku family for generations and they wanted to retrieve Dressrosa to the its rightful owner which said compromise was accepted by the straw hats, Luffy during the week bonded with both Rebecca and Viola a fact that didn't go unnoticed by the straw hats, Law and the family of both women with latters being happy for them.
When the day of the competition came everyone was prepare for the battle, the place in where they were going to fight the Donquixote family was the Corrida Coliseum a place in which has made a name for himself as the champion with a legendary record before losing his leg fighting Diamante and Buffalo. To enter the competition Luffy registered himself "Lucy" so he would go unnoticed given his reputation fighting in the underworld in which Doflamingo was big shot called "Joker", during the first round Lucy made quite the impression in the ring that he even caught the attention from all the competitors who wanted to fight the "Dark Horse" of coliseum.
After the second round Luffy met with various of the competitors which were: Cavendish "The White Horse", Bartolomeo "The Cannibal", Don Sai from the Happosui army, "Destruction Cannon" Ideo, Hajrudin the giant and "Massacre Ruler" Orlumbus. The six of them recognized Luffy under his disguise and start talking with him wanting to know the true of why he is participating in the tournament, after telling them the real reason of his participation the six fighters decide to help him alongside Leo to save Dressrosa. From the third round to the preliminary round the fighting alliance defeated most of the members of the Donquixote family except for Baby 5 and Monet (the first for falling in love with Sai and latter for helping her little sister), when the semifinal round started it was Zoro and Law's turn to have some action because their enemies were three of the second in command of Doflamingo: Pica, Vergo and Trebol.
When the final members of the Donquixote family defeated it was Luffy turn to fight the biggest demon: Doflamingo himself, during the fight it was revealed Luffy's real identity but the people of Dressrosa still cheered for him as Lucy. After a fierce battle Luffy accomplish to defeat Doflamingo with the stronger punch her launch in his life so he was crowned as the new champion of the coliseum and savior of Dressrosa. A couple of days after the battle during the victory banquet with Riku Doldo restore as the president of Dressrosa Luffy's allies alongside Monet and her sister said that they wanted fight under his flag, so they wanted to create the Straw hat fighting Organization with Luffy as their president and Monet as the secretary, Luffy accepted to form his fighting organization with the condition that he and his friends were able to keep fighting a condition that the seven division leaders accepted gladly.
Few hours after the formation of organization Viola and Rebecca wanted to personally thanked Luffy for helping them retrieve their home.
Lemon scene
The next morning before leaving Dressrosa Luffy gives his two lovers a final kiss to each and promises them to help them if they ever need him again making the two of them very happy.
