剣骨覚醒 ~霊骨を奪われた俺の逆襲~

They killed his parents and carved the sacred bone from his body, grafting it into their own son. A blind old man saved him and taught him to forge a new spine from the sword. Eight years later, he enters the Sword Grave and faces the thief who wears his birthright. When a boy rebuilt from steel meets the monster, can justice ever be carved clean?