The underground organization known as "Buddyfight Club" holds a ceremony with illegal buddy fights. The Buddy Police hears the rumor of their sponsor being an Omni Lord. Tasuku is immediately ordered to head to Chou Nagoya, where the ceremony is held. After some time of investigating, Tasuku stumbles upon Sofia and a mysterious boy doing business. Suddenly, Rouga Aragami appears. He activates his Disaster Force and attacks the mysterious boy. Tasuku tries to control the situation, but the mysterious boy gives both Tasuku and Rouga the Buddyfight Club's invitation and disappears. Tasuku witnesses a shocking spectacle…!