Su Yu, who created a new account in the fully immersive trading card game "Yu-Gi-Oh! Link World," inexplicably found himself transported to the game world, complete with an NPC template. The timeline rewound back to before the game's official launch, with players having one month until the game begins. The nameless Pharaoh still slumbered within the high school student Yugi Muto, and the groundbreaking tournament, Duel City, which holds significance across eras, had not yet commenced. When the game finally launched, and players logged in, they discovered a brand new NPC that did not exist in the original storyline.