In a world of mighty nations known as Domains, an incredible power force known as 'Keikō' flows through the blood of specific humans. These empowered beings are known as 'Champions!' In the midst of this, there lies a child whose peaceful life takes a dark turn. Follow the story of a young boy who would stop at nothing to find and destroy the evil group of sinister, mysterious men who destroyed his hometown and killed his beloved grandfather. Witness our main protagonist, Yasuken Moji, as he passes through hardships and troubles on the journey in his indomitable vengeance.