Harsh bullies frequently prey on a vulnerable, fragile individual—someone exactly like Yuugi Mutou. His lovely childhood companion, Anzu Mazaki, is always ready to defend him, yet he cannot rely on her indefinitely. Katsuya Jonouchi, usually flanked by his sharp‑tongued ally Hiroto Honda, seems harmless too, even though he constantly lands Yuugi in trouble. Still, what Yuugi yearns for most is a genuine friend who truly comprehends him and will never betray him.
Yuugi holds dear his Millennium Puzzle, a relic from ancient Egypt that arrived at his grandfather"s game shop. Thinking the solution would grant his wish, he completes it, awakening a new persona inside him—the spirit of the "King of Games."
Dark, twisted, formidable, and dependable, this new entity, Yami Yuugi, is the polar opposite of Yuugi. Whenever injustice befalls him, Yami Yuugi seizes control and compels the adversary into a "Shadow Game." The consequences are severe; whoever loses will taste the darkness lurking within their own heart. It serves as a constant reminder that every action carries weight for all.