"Yu-Gi-Oh! Arc-V" is set in a multiverse where four dimensions—Standard, Fusion, Synchro, and Xyz—exist separately, each with its own unique Dueling style and societal structure. The story centers on Yuya Sakaki, a young Dueltainer from Standard Dimension’s Maiami City, who aspires to bring smiles to people through his entertaining Pendulum Summoning techniques. Yuya’s life changes when he encounters a mysterious girl named Zuzu Boyle, who is targeted by Leo Akaba, the leader of the interdimensional organization Academia. Leo seeks to unify the dimensions by force, using Dueling as a weapon.

As the narrative unfolds, Yuya discovers that he shares a connection with three other boys from the alternate dimensions: Yuto (Xyz Dimension), Yugo (Synchro Dimension), and Yuri (Fusion Dimension). These four individuals are counterparts of each other, collectively referred to as the "Four Dimensions Yu-boys." Their intertwined fates are tied to the ancient conflict involving the Genesis Omega Dragon (G.O.D.) cards, powerful entities that threaten the balance of the multiverse. Yuya’s journey becomes a quest to protect his friends, reconcile the differences between the dimensions, and prevent Leo’s destructive plans.

Throughout the series, Yuya and his allies face numerous challenges, including battles against Academia’s elite Duelists, confrontations with the ruthless Lancers, and internal struggles with their own identities and purposes. The story explores themes of unity, identity, and the consequences of war, as Yuya grapples with the darker aspects of his own personality and the legacy of his father, Yusho Sakaki, a legendary Duelist who disappeared under mysterious circumstances.

The series introduces a diverse cast of characters, including Yuya’s friends Gongenzaka, Shay Obsidian, and Sora Perse, each representing different facets of the Dueling world. Antagonists like Leo Akaba, his daughter Ray Akaba, and the enigmatic Yuri add layers of complexity to the conflict. The narrative builds toward a climactic showdown in the Fusion Dimension, where the true nature of the G.O.D. cards and the origins of the multiverse are revealed. The resolution emphasizes the importance of coexistence and the power of bonds forged through shared struggles.