The stories that lie within the cards come to life...

After inheriting the company from their parents, siblings Yuuhi and Yuamu Oudou have started to work at the Alien Trouble Consultancy, an organization that hunts aliens. Although they have never encountered aliens before, Yuuhi is desperate to meet one as he believes that an alien has stolen his important item, called the Earthdama. One day, while searching for extraterrestrial creatures, Yuuhi and Yuamu find a strange spot in the forest where many trees have fallen, forming a scenery similar to a crop circle. As they venture further, they discover a mysterious spaceship and enter it out of curiosity. To their surprise, they come across Yuudias Velgear, an alien from the Velgear Star Cluster. As it turns out, Yuudias is seeking to learn about Rush Duel—a card game popular among elementary school students—as he believes that it will save his home from a long war. With the siblings agreeing to teach Yuudias about Rush Duel, they eventually realize that their first contact with an alien may not be a random coincidence.

Jam lives in a small coastal village that lives off fish that men bring home every day. One day his grandfather tells him that in recent year the fishing has been scarce. The steel hawks who live nearby on the mountain have kidnapped Watt Poe, a narwhal who is said to be the great protector of the sea, thus depriving the fishermen of his blessing. The boy decides to climb the mountain with the intention of bringing Watt Poe back to the sea...

Through an unexpected turn of events, an ordinary elementary school student, Hiro Enryuu, finds himself in the world of the Dragon Collection game. This is a world called Dragon Earth, where gods, humans, and monsters exist side by side. Those who roam this world using a magic book, called a Grimoire, and cards to summon monsters and search for treasures that bear the powers of dragons are called Dracolle Battlers. Despite his bewilderment, Hiro becomes a Dracolle Battler and, together with the friends he meets there, begins his adventure to become a legendary Dragon Master! (Source: Crunchyroll)