I'm Trapped Inside a Prince as the Most Powerful Entity - Chapter 3: The Hidden Truth

He is Monkey D. Luffy, but not the original Monkey D. Luffy, because in this world, that one is Lucy, his blood sister, while he had a peaceful childhood with his other three brothers. They all ended up following different paths since he didn’t have his memories. It was only when he entered a barrel lost at sea to save himself that he finally began to regain all the knowledge he had of this world from his past life. On top of that, he realized he could use this knowledge to his advantage to acquire everything he needed on his adventure. He was given four chances to summon people to start his journey, and more importantly, he finally received his two devil fruits, becoming powerful from the very beginning, with a plan that stretched to the end of his adventure.This story is the adventure of a man called Monkey D. Luffy, with the goal of becoming the emperor of all the seas in the world. For that, he will find the One Piece and destroy the World Government, for they cannot coexist. Be it the Marines, government agents, CP units, Tenryuubito, Holy Knights, Gorosei, or Im, Luffy will walk over a mountain of corpses.“I want you in my crew. Together, we will change the whole world and turn it upside down.”“Hahaha. Don’t worry, I believe in your potential, that's why I want you in my crew.”“My swordsman already fought you and lost. Now let’s see the strength of the world’s greatest swordsman too, right, Yamato? I hope you don’t mind fighting two rookies at once...?”“Awaken... Awaken my power... and destroy all your enemies...”“It’s good to see you after so long, Grandpa... and you, sister.”“Monkey D.? The most dangerous family in the world!”“Isn’t it a beautiful scene? Two Shichibukai and a Vice Admiral as my trophies! Come on, take a good picture and put it on tomorrow’s newspaper cover!”“I declare this kingdom my territory!”“Enel, you’re nothing but an idiot with a god complex. If you’re a god... then I’m a god slayer.”“As you said, Teach, people’s dreams never end! And if people’s dreams never end, why should I stop?”“Doflamingo... Jake... you’re so far from home. I hope you don’t regret this.”“You narcissistic woman, how can someone be so annoying and arrogant?”“What did you say, you damned man?!”“I now declare you husband and wife.”“It's time to return to the Blue Sea, after all, we have a world to shake.”“CP9? What a disappointment, Sengoku. I want money for them and Doflamingo... I want 2 billion berries at Enies Lobby in a few days.”“Enies Lobby was completely destroyed...?”“I've fought Mihawk, Jimbei, Crocodile, Doflamingo, Hancock, and Moria... you're the only one left, Kuma...”“It seems we've finally met, Rayleigh...”“Let's invade Impel Down!”“I came here to find you, sister, it's time for you to join my crew... Joygirl...”“It looks like we've finally arrived at the war.”“Sengoku... you tried to arm yourself to execute my brother, so I'll make an example of this Tenryuubito for the whole world.”“You can't do this...!”*BANG!*“He actually did it, that bastard....”“Your chains are loose, move your ass and get out of Marineford!!”“Saturn!!! I'M GOING TO KILL YOU!!”“I couldn't kill you last time, Akainu... but I'll make sure to do it now.”“Destroy the rest of Marineford.”“Let's get out of here. When you return, you'll take over this country for your family, Rebecca.”“No matter if we're on opposite sides... I will always love you, grandpa.”“It's time to start our training.”“Let's begin. Now, let's head to the New World, capture territories, and grow our fleet.”“Is the entire Straw Hat fleet ready? Now let's head to Wano, after all, we have a war against two Yonkou!”

I returned after 10 years.

Youyou is a mother’s precious daughter. The word she often talks about is: “My mother said…” Therefore, many people laughed at her for not being weaned, but Xu Youyou didn’t care, she still went her own way, determined to be the best mother’s baby girl.
In high school, Xu Youyou was pressed by the domineering school grass against the wall to confess. Xu Youyou frowned and refused: “No, my mother said that the most important thing for students is to study! Otherwise, they will become the scum of society in the future!” Someone who has a single-digit score and hates studying: “….”
In college, a rich and handsome president He wanted to use favorable conditions to help Xu Youyou, but got a contemptuous look from Xu Youyou: “My mother said, there is no such thing as getting something for nothing, if there is, there must be a conspiracy!” The president who wanted to find white moonlight substitute: “….”
*5874 is a system whose mission is to change the miserable fate of the abused heroine Xu Youyou and make her happy. But, look at the little beany who is only three years old in front of her, and look at the terrible environment of the orphanage. The system decides to tell a lie “Youyou don’t be afraid, I’m your mother.”
After fifteen years of conscientious teaching, the system fell into a deep sleep due to a lack of energy. When it woke up again and found Xu Youyou living in a beautiful villa with countless jewels and beautiful clothes. The system was heartbroken: “Baby, why are you still …” Xu Youyou is excited: “Mom! You finally woke up! You were right! The best money in the world is money earned from loving a brainy man! System: “… Did I say that?”

- Description from Novelupdates

A teenager who unexpectedly gets transported to the modern world from ‘the world of the immortals’ . He finds himself in the body of an ordinary guy. He wants to go back to his world and for that, he will have to practice to get stronger and investigate the reason why and how he crossed through to this world.