Yuya Sakaki is a student of a duel school called "You Show Duel School", and their dream is to become the worldwide champion of duels. One day, the manager of Strong Ishijima sent a request to a display duel. And then starts the Action Duel. But even Yuya managing to have a thrilling duel, he is pressed. Then his pendulum begins to shine, and gives the light to a new kind of monster "Pendulum".