Shadow Skill: Kurudaryuu Kousatsuhou no Himitsu

Synopsis

In a kingdom where the martial art Shadow Skill is vital for survival, a young boy named Cau Ban trains relentlessly. Inspired by the legendary Scar Face, he aspires to become an invincible warrior. His adopted sister, Elle, a master of Shadow Skill, trains alongside him. Their training is interrupted when intruders attack the castle, seeking a mysterious box containing a secret.