I Was Just Getting By in One Piece, Then I Became an Admiral

Shang Wu transmigrated into the world of pirates as a child. His parents were Marines, and after leaving home to follow Garp on a campaign against pirates, they never returned. To protect himself, he began practicing a Buddhist scripture his parents had left behind, one they had obtained from the Red Line... the Vajra Heart Sutra. Shang Wu discovered that the method for practicing the Vajra Heart Sutra was actually the same as Haki in the pirate world. After joining the Marines, he had planned to coast through life. But when he reached the Sky Islands and obtained the Rumble-Rumble Fruit, he also inherited Enel’s memories. From then on, his plans to give up and take it easy were gradually disrupted by another subconscious mind.