One Piece: Sign in at the beginning of the game

Roja found himself transported to the world of One Piece, starting out within Doflamingo's Birdcage. Fortunately, he activated the Sign-In System and obtained the legendary heat-type Zanpakutō—Ryūken Wakahara! "Everything in the forest turns to ash, and the blade burns like fire." This blade is renowned across the seas for its terrifying flames! The Five Elders: "Damn it, who is this person who keeps hindering us?" Sengoku: "This guy must have some hidden agenda!" Akainu: "His flames... they can actually hurt me!" Red-Haired Shanks: "This person is definitely someone worth watching!" As Roja continues to sign in across various islands, he gains even more god-tier rewards. From this moment on, he is the strongest on the seas!