SHADOW SKILL: Kurudaryuu Kousatsuhou no Himitsu

Set in a warrior kingdom where the lethal martial art known as Shadow Skill is essential to its survival, the story follows Gau Ban, a young boy who aspires to become an invincible fighter. Inspired by the legendary Scar Face, who famously defeated two thousand opponents, Gau trains rigorously alongside his adopted older sister Elle, a master of the discipline. Their dedication is tested when a rogue band of intruders launches a sudden assault on the castle, seeking to steal a mysterious box that holds a dangerous secret.