A suspicious shadow is trailing Yuma. It seems someone has been after Yuma, and their identity is the unassuming girl Cat-chan from Yuma's class. Yuma and Kotori fall into Cat-chan's trap. To rescue Kotori, he's going to have to Duel. Astral is cautious of the strange vibes he's getting from Cat-chan, especially with the strategy of her "Transforming Cat Deck"!