Amidst a fierce battle at Azuchi Castle during Japan's Sengoku period, a young samurai named ZAN suddenly hears the mysterious voice of a girl emerging from nowhere. This new world is controlled by a ruler named RIKKA, who maintains order using a symbolic entity of life known as the "Trope." Caught in the middle of a conflict and forced to face brutal battles against powerful enemies and Trope creatures, ZAN begins to question the meaning of the "justice" that had always been fought for. Determined to uncover the absolute truth about this mysterious realm, ZAN decides to forge ahead. ZAN is not alone—the samurai embarks on this journey alongside Panther, a mechanical tiger-like creature, and Uzume, the mysterious girl who brought ZAN to this dimension.