Two years have passed since the Mauve's uprising. Gallet Revolt who has landed in Grand Lolo, following his battle with Vizarga has undergone great changes in his ideals. While in the "white world," Gallet meets a certain young man. Meanwhile, Varte Parx, who rose as the leader of the Mauve, uses his aerial fortress to put pressure on the Unified Government. The confrontation between the Unified Government and Mauve continues to intensify. Can Gallet change the future laid out in the Otherworld Records? The cogwheel of fate continues to rotate, and the world finally enters a time of change.
Centuries after the events of Saga Brave, a third race called the Mauve has emerged alongside Humans and Mazoku. Identified by their purple blood and immense intelligence, the Mauve are shunned by the other two races and are viewed as a threat to the peace of the world. Having experienced this prejudice first-hand, a teenage Mauve named Galette Revolt journeys forth to find a way for all races to understand each other by playing Battle Spirits. However, other factions from each race aim to maintain the peace/reform the world through more nefarious ways...