This series continues Koko Tekken-den Tough, which spanned 42 volumes and depicted the younger protagonist, Kiichi, training under his father, Seiko Miyazawa. It is a mixed martial arts manga centered on the Miyazawa school of martial arts. At first, the plot focuses on Kiichi’s efforts to heal his father after Kiryu, his brother, nearly killed him; however, as Seiko recovers, the narrative shifts away from this goal toward tournament-style combat.