Follows alien Yudias Velgear's journey to Earth to learn Rush Dueling to end an interstellar war, teaming up with human twins Yuhi and Yuamu Ohdo, who run an alien problem-solving company (UTS) and help him understand the game, all while they get tangled in cosmic conflicts and the mysterious history of Rush Dueling's origins, linking back to the Yu-Gi-Oh! SEVENS storyline.