Yu☆Gi☆Oh!: Go Rush!!

Yuuhi and Yuamu Oudou are two siblings who started working at Ultraterrestial Trouble Solution, a company inherited by their parents. This company works to hunt aliens. However, these two people never caught any alien before but are determined to do so. Yuuhi is more desperate to see and catch an alien as he believes these creatures have stolen his Earthdamar. One day, they found a mysterious spaceship around a crop circle of scenery in a forest. They explore it and meet with Yudias Velgear, an alien from the Velgear Star Cluster. Yudias wants to learn a kid’s card game Rush Duel, as he believes this can prevent its planet from a drastic war. Yuuhi and Yuamu agree about it. But soon they all realize that their interaction with Yudias is not a coincidence.