Synopsis
In the Twelve-World, a mysterious realm located in an unknown dimension, humans, monsters, and spirits have coexisted peacefully for ages. All life is safeguarded by the Princess of the Needle Tower in the Zero World. Suddenly, the balance of the Twelve-World shatters. The Princess of the Needle Tower falls into an enchanted sleep. Without her protection, the monsters break free from the chain of life and grow uncontrollable, beginning to attack humans. The only ones capable of restoring harmony and balance to the Twelve-World are the troubleshooters known as the Great Children, who handle incidents involving monsters. Spaak is the finest among the Great Children and the center of admiration for all children. He learns that the Zero World has been invaded. On his way to the Needle Tower, he encounters an incredible boy named Bucky. Young and ambitious, Bucky dreams of becoming the strongest man and conquering the world. Spaak senses something special in Bucky and chooses him as his successor. Thus, Bucky embarks on a quest to become the greatest Great Child in the world. As he charges recklessly forward, Bucky discovers that the monsters are being controlled by an unknown power from another dimension. He meets Kai, Pinky, and other fellow Great Children, and together they continue their journey to the Needle Tower.
