Journey to the One Piece

Transmigration!! Check! Weird System!! Check!! Shake the One Piece World? Not done yet! But definitely on the bucket list of 'must-do' things. Ken, who was transmigrated to the One Piece world became the extra which popped out of nowhere on the door of Curly Dadan one night. Follow the story of how Ken, with the help of knowledge of future events and his system change the One Piece world! — Description from novelcodex.org