Breakthrough with the Forbidden Master Novel

Ten years after humanity's victory over demons, the children of legendary heroes have come of age. Earth, son of the great warrior who defeated the Demon King, was destined to follow his father's path. Yet he resented the burden of his father's legacy and the expectations placed upon him. When Earth discovers his father's legendary sword sealed within their family mansion, he learns a startling truth: the spirit of the Demon King remains trapped inside, unable to pass on. Mysteriously, only Earth can see and communicate with this ghostly presence, and through the sword, the Demon King possesses him. Forced into an unusual coexistence, Earth is approached by the trapped spirit with an intriguing proposition. The Demon King offers to train him in exchange for helping achieve vengeance against Earth's father and the world that defeated him. Driven by his own resentment, Earth accepts this dark bargain. As their strange partnership unfolds, the hero's family, the legendary warriors of old, Earth's loved ones, and the world itself will soon feel the consequences of this forbidden alliance.