"Freedom is my destiny. Justice is my bond." The world expected Monkey D. Luffy to be a cheerful dreamer. Instead, fate gave it a captain unlike any before. Reborn with memories of another life, possessing the mind of a genius, the discipline of a master martial artist, and the experience of a sailor, Luffy chooses to forge his own legend. Calm, calculating, and unwavering, he walks a path where freedom and justice stand side by side. After consuming the legendary Hito Hito no Mi, Model: Sun God Nika and the mythical Hito Hito no Mi, Model: Archangel, he becomes the bearer of two divine wills-the Warrior of Liberation and Heaven's Guardian. Behind a black mask, wearing the coat of a future Emperor, he sails the Grand Line carrying a Supreme Grade Sword, the sacred Gunbai, a divine Gavel, and a spear that honors the brother he could never forget. He will challenge Emperors. He will shake the World Government. He will expose the secrets of the Void Century. He will build the strongest pirate crew the seas have ever witnessed. This is not the story of a hero. This is not the story of a god. This is the story of a pirate who will become the Emperor of Liberation & Justice. The seas will know his name. Monkey D. Luffy. The King of the Pirates.

Izuku has the same abilities and sense of humor as brook from One Piece... That's it. I don't won anything unless I say I do

In a fight against Tomura Shigaraki, both Eri and Izuku are transported into the world of One Piece. With new friends and family, will they survive this perilous world or die trying? Not everything will be exactly canon, so if you see it is going differently from the normal One Piece, sorry. It has been a bit since I watched It, so I am going by what I remember and with a little bit of my own twist. Those will hopefully be weekly, but I am in school, so this will probably be whenever I can.

Izuku has strange luck. Wait! You don't believe me? Then how will you explain this? Izuku Midoriya, a boy once hailed as the hero and savior of Japan, has been reincarnated into the body of his five-year-old self in a world brimming with seas, pirates, marines, treasures, and countless other wonders he had never encountered before. Even in this new world, Izuku is determined to keep his dream alive. However, he will soon discover why he must become the freest man in the world in order to save everyone with a smile. . . . . . . My Hero Academia is owned by Kōhei Horikoshi. One Piece is owned by Eiichiro Oda.

After a sneak attack from the league of villains, Midoriya Izuku disappears from the face of the earth. Weeks pass before he returns. Join Class 1-A as they discover how they're friend has changed.

A side-story based off of Midoriya of the Straw Hats. This series of short stories depicts Izuku's life while sailing with the Straw Hats.

I figured Why not KingJoka Made a story with Jiki Jiki so I'll make an Ope Ope no Mi Deku

After UA completed their licensing exam to become hero's, they decided to get rest. But after a fight broke down between a green haired fanboy and a blond boomer, Izuku Midoriya heard a scream close by. Even though it's not his business to do anything, his hero personality took over and tried to save that person. But he only met a person instead and was sent to a new world. Two weeks later of Deku's disappearance and Class 1A have been depress since. Then one day, while the class is coming back to their dorms, and sees a stranger cook something nice. When they found out who it is they, they were both shocked and happy. But a day after that, the stranger showed them something that would shake the whole hero society it's self. (This story is inspired by @KingJoka, go look at his stories for fun.)

Same concept as the original but retold with new ideas and concepts.

EDITED: Izuku Being transported in a another world, where Marines and Pirates hold the greatest power and the two powers always clash at each other everytime the two meet. Now, He will only have to choose to become a Pirate in this world or become a Marine. Every step he take, He'll surely change something for better or for worse, no one knew. Edit: This Fanfic will contain MHA Spoilers and more