[No system, set sail for the dream, get on board as a person with fruit abilities, the first adopted child in the black market]
The pirate-flavored One Piece can be watched as a side story.
The protagonist Ryan is a fish-human hybrid with a domineering power of knowledge and color. His dream is to live in a world where everyone is equal and there is no discrimination. Roger died but his soul resided in the knife used to execute him. The protagonist stole the knife for money and accidentally awakened Roger, who became his master. Under Roger's guidance, he becomes stronger step by step, finds partners on the sea, defeats the Four Emperors, overthrows the rule of the Celestial Dragons, and creates the world of his dreams.
