Haru Shirokane, the timid, and Taiga, the boy who seeks to dethrone Shun Kamiya as the strongest XB player, come face to face with the leader of the Minato Tribe himself as a force known as the Chiyoda Tribe led by Tenshin Ōtori looms and spreads its clutches. Together, they must join forces to stop this mysterious man from taking over all of Neo Tokyo.