The Fallen Seraph: Multiverse Calamity

You're Qian Renyouyu, twin brother of Qian Renxue, abandoned in the Star Dou Great Forest by Golden Crocodile Douluo after awakening the forbidden Six-Winged Fallen Angel martial soul. Saved by an Abyssal Sovereign System that strips your soul power in exchange for the Mythical Fallen Angel Fruit and Conqueror's Haki, you are dropped into the Grand Line decades before the Great Pirate Era. Rescued from the sea by Gol D. Roger, you join the Oro Jackson as an apprentice alongside six-year-old Shanks and Buggy, slowly discovering the warmth of found family across island voyages while forging the strength to shake the multiverse.