In the midst of a corrupt society, a young man takes up the identity of the mysterious thief and Duelist, "Kaitou Shounen". Aspiring to reveal to evil in this world, he begins his adventure. The true Duel begins at midnight...

In a world ruled by the "Law of Game", Duelists have become a symbol of power. However, many Duelists abuse this power, causing many conflicts to arise. In an effort to help would-be victims of these Duelists, Yuichi Ido travels the world on an adventure to assist those who cannot help themselves, find powerful cards, and even stronger rivals. An original Yu-Gi-Oh! Story!