Yu-Gi-Oh! Go Rush!!

Synopsis

After their parents retired, siblings Yuuhi and Yuamu Oudou now run the Alien Trouble Consultancy, a company focused on tracking down extraterrestrial beings. Though they haven't found any aliens yet, Yuuhi is still obsessed with discovering one, especially after he suspects an alien stole his precious "Earthdama." During a search for alien life, Yuuhi and Yuamu come across an unusual spot in the forest where many trees have toppled over, creating a shape similar to a crop circle. Driven by curiosity, they go deeper and find a strange spacecraft, which they choose to explore. Inside, they unexpectedly encounter Yuudias Velgear, an alien from the Velgear Star Cluster. Yuudias is trying to learn Rush Duel, a card game favored by young children, because he believes mastering it could bring peace to his war-torn world. As Yuuhi and Yuamu agree to teach Yuudias Rush Duel, they begin to wonder if their first contact with an alien was truly by chance.