Pirate: I am King Luffy

My father is the leader of the revolutionary army!
My grandpa is a naval hero! A close friend of the Admiral!
I fought back and forth with the Saiyans!
I, the Movie, King Luffy!
Who dares to kill me! Who dares to kill me! Who dares to kill me!
……
The story is about a time traveler who became King Luffy and chose not to eat the fruit that represented destiny. He thought he had a prominent family background and was well-known all over the world, but... how come I, Luffy, had a childhood sweetheart?
The path to kingship that was going on smoothly seems to have suddenly taken a turn... This is the road to kingship that started in childhood. ...