Is 'One Piece Otherworldly Arsenal' Part Of The Main 'One Piece' Series?

Al, was thrown into another world for no apparent reason. A new world filled with magical things. However, this wasn't the first time he had been reincarnated. He thought he was just an ordinary youth, but it turned out that his identity was so extraordinary in his first reincarnation. There were his harems still waiting for his arrival. Will he meet them soon and what will happen?

[Triple Avatars] [Alchemist] [Psychic] [Colossal Beasts] [Grand World-Building] [Decisive and Ruthless] [Invincible-Style] In the vast, boundless Astral Realm, the branches and leaves of the World Tree can shroud countless planes. The fear of the Nightmare Deities spreads like a creeping mist, while the radiance of the Magic Pioneers illuminates all known space and time… The conflict between the Old Gods and the New Gods! The clash of Technology and Magic!

Earth is doomed, and humanity is on the verge of extinction. In reality as we know it, where humanity will undoubtedly be annihilated, six legends are gathered with the sacred mission of saving humankind from annihilation. Creating and finding a new world foe the remnant of humanity was the hope of mankind, but which world will surrender or give out it terrain without a feat. The undertaking of driving them in their campaign falls upon the shoulders of a solitary amnesic and frail man neglected in the wild alone with next to no method for endurance. Join Tsao's adventure in this slow-paced journey submerged in a fantasy world where he'll meet friends, enemies, and love interests who will discover this brand new world along with him. Will Tsao be able to find hope again for humankind? Will the remnant be able to stand against the world that stands against them even in this their feebleness? In this way, survive in the parallel world, please!

A thirty-year-old office lady, who got into an accident and is now trapped inside a novel series she loves. She was reincarnated into one of the side character extras of the story and meets in person the tyrant magician, the playboy prince, and the clueless female lead of the story.

When the Supreme God of Heavens disappeared, the gods of the Greeks, Norse, Mayans, Egyptians, Chinese, and many more sent their young mortal champions to a magical world in order to participate in the Game of Heavens and Earth on their behalf to win the divine throne. However, the young mortals used their powers, weapons, and tools that were bestowed upon them to form themselves into guilds and create a paradise for everyone. To any kid from Earth, an exciting adventure and new beginning await them, and Sam Roche is one of those lucky chosen ones — or is he still unlucky? Since everything is in peace, Sam tries to build a new life in the City of New Beginning while hiding his dark secrets from his new friends about the sins he committed back on Earth. Eventually, Sam and his friends discover that the strongest guilds have long controlled the paradise, and their rivalry might spark a war that will engulf the land. Wanting to get away as much as possible, they decide that they form their own guild and leave the city. However, a powerful guild is threatening the fragile peace of the magical world in order to win the Game of Heavens and Earth. Sam must either run away to save himself or become a hero to save not only his friends but both worlds.

August White, an orphan girl who’s reigning her gang was suddenly involved in a manic accident between the orcs and people from another world. She was abducted and brought to Pandora—a parallel universe of Earth. She was forced to live a life she did not wish for. She only wants to return to earth and not involve in the power struggle and conflicts between the nobles and monster subjugation.