The time of the Irregulars is now here. In 1945, a pivotal occurrence changed the path of history forever. The detonation of the atomic bomb had unforeseen consequences, causing scientific progress to come undone and heralding the emergence of the Irregulars. These were people born with phenomenal talents that exceeded the limits of human understanding. One such individual was Eiji Hongou, a mere 17-year-old with the awe-inspiring ability to control the legendary God of Swords, Reppu. Together with his allies, Eiji strives to unite West Dragon City by combining their strengths.