In the decisive battle of a martial arts competition, Shurato and his companion Gai are suddenly enveloped in a colossal luminous sphere. When they regain consciousness, they discover they have been transported to a mystical and celestial domain. Through their explorations, they realize that Shurato was previously the reigning monarch of this universe but has now been reverted to his original status. Subsequently, their newfound harmony is disrupted as Gai inexplicably turns hostile towards Shurato, unleashing a series of exciting and otherworldly occurrences that ensnare the inseparable friends.