Yu-Gi-Oh!: Why Do I Have to Be the King of Games?

Several selected card players are sent to several Yu-Gi-Oh! anime worlds, where they become guardian spirits to several female card players. The System assigns them the task of helping their Hosts become Kings of Games. After many twists and turns, the card players help each Host become a King of Games, securing female duelists a pivotal place in the dueling world. But just as all the guardian spirits think they are going home, they and their Hosts are transported together to an unknown space, where a battle royale begins at once. Who is controlling all of this, and what is the person behind it trying to achieve? Each card player will have to find out for themselves.