As Yuya breaks out of his imprisonment and rejoins Yusho, Leo claims that Yuya is Yusho's son but at the same he is also not his son. Leo brings out Zuzu, Celina, Lulu, and Rin and turns Dr. Buggenstein into a card for his dangerous thinking. Leo continues his story in which he created four cards that could potentially stop Zarc. Before he could use them himself, Leo's daughter, Ray, took the cards herself and used them against Zarc, which split him, herself, and the world into the current four dimensions. After Leo recovered his memories that were lost upon ending up in the Standard Dimension, he traveled to the Fusion Dimension in order to find traces of Ray. Leo discovered Ray has been split into Zuzu, Celina, Lulu, and Rin. Leo reveals that the Arc Area Project's purpose is to use the energy from people of the Xyz Dimension turned into cards in order to rejoin the four dimensions into one united dimension named Arc-V, and reunite the four girls into Ray once more. After Leo reveals that Zarc had also split into Yuya, Yuto, Yugo, and Yuri, he orders Declan to duel with him against Yuya. Declan instead sides with Yuya and faces against his father.