"DDD: King of the Different Dimension" is the twelfth episode of the Yu-Gi-Oh! ARC-V anime. It first aired in Japan on June 29, 2014.

As if responding to Himika Akaba’s voice when she suggests a way to settle the fight between You Show Duel School and Leo Duel School, Reiji finally appears, volunteering to be Yuya’s opponent. Though Yuya tries to hide how nervous he is, he promises to not forget his usual “cheerful and fun” Dueling style. Then the Duel starts and the strategy Reiji employs surpasses everyone’s wildest expectations.