Jirou Jay Takasugi

Bullies often target someone frail and weak—someone exactly like Yûgi Muto. He treasures his Millennium Puzzle, an ancient Egyptian artifact that was brought into his grandfather's game shop. Believing that solving the puzzle will grant him his wish, he completes the puzzle, unleashing a new personality within him, the soul of the "King of Games." The new personality named Yami Yûgi is the exact opposite of Yûgi. Upon any injustice toward him, Yami Yûgi takes over Yûgi's body and forces the opponent into a "Shadow Game".

Ten years after the Ceremonial Battle, a teenage boy named Judai Yuuki (Jaden Yuki) heads off in order to join the Duel Academia (Duel Academy) located on a remote island off the coast of Japan. There he meets his fellow students and gains a few friends, along with a few enemies. Judai is put into the lowest rank of Osiris Red (Slifer Red), but he continues to test his skills against the students and faculty to prove his worth as a Duelist and earn the respect of everyone around him.

After falling through a time-slip, Yusei Fudo (who has just had his powerful card stolen by a mysterious stranger) meets with Jaden Yuki and Yugi Muto, who agree to help Yusei defeat the evil Paradox, who is planning to destroy Pegasus before he can invent Duel Monsters.