Tsukasa found himself wearing strange clothes with another strange card as he, Natsumi, and Yusuke found themselves attacked by the Strange Demon Robot Schwarian and his Chaps as Kamen Rider Black RX battled them, with both sides believing Tsukasa to be Joe the Haze. When the Seamoon Fangire and Scorpion Imagin suddenly appeared, Tsukasa became Decade to help RX out against the monsters with Agito's power as Schwarian rans off. After Natsumi stopped RX from attacking Decade, RX took her words to heart and saw Tsukasa as an ally. From there, he introduced himself as Kotaro Minami and said that had been fighting the Crisis Empire. Everyone was confused at the sudden appearance of Imagin and Fangires in this A.R. World with Tsukasa reluctant to fight, once more. While Tsukasa took pictures, a