Yu-Gi-Oh! Go Rush!!

Yuuhi and Yuamu Oudou have taken the reins of the family business, the Alien Trouble Consultancy, which specializes in the detection and investigation of extraterrestrial beings. Despite their lack of experience with aliens, Yuuhi is particularly eager for an encounter, convinced that an alien has pilfered his prized possession, the "Earthdama."

While exploring a peculiar forest clearing reminiscent of a crop circle, the siblings stumble upon a mysterious spacecraft. Their curiosity leads them aboard, where they meet Yuudias Velgear, an alien from the Velgear Star Cluster. Yuudias is on a mission to understand Rush Duel, a card game beloved by children, believing it holds the key to ending the conflict plaguing his home. As Yuuhi and Yuamu agree to teach him the game, they soon realize their unexpected meeting might be the beginning of a much larger adventure.