Reginald Kastle

Ryoga, a mysterious duelist who challenge Yuma Tsukumo, the number one bad boy at his school, to duel. When the mysterious entity Astral appears before them a new legend begins.

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After the mysterious Astral, Yuma and Ryoga found out that they both have one new card each in their pockets. At the back of those cards have mysterious symbols. And that is the start of the jouney of Yuma Tsukumo, the next King of Duelist, with Ryoga.