Nao Kanzaki is honest to a fault. Uncorrupted and virtuous, Nao is the perfect target for a large-scale scheme—the so-called Liar Game. Suddenly in possession of one hundred million yen, she is expected to steal the same amount from her assigned opponent—her former middle school teacher—or face crushing debt. Trusting her teacher without question, Nao quickly realizes that she is trapped. To gain an advantage, Nao comes in contact with Shinichi Akiyama, a brilliant con artist just released from prison. Though Akiyama has no real reason to help the naive girl, he ends up aiding her victory. However, driven by her unwavering sense of justice, Nao chooses to continue into the next round, and Akiyama, unwilling to leave her to fail, joins her. In the Liar Game, participants are expected and required to deceive, manipulate, and betray or be buried in lifelong debt. Yet Nao, with the help of Akiyama's genius, is determined to beat the game without abandoning her morals and prove that generosity and sincerity will always prevail.

An abnormal phenomenon has been observed in Kaga, where Akina and his friends live. A town shrouded in thick fog, a great tower standing sentinel… This is the Fantasma. ——On the night when the crimson moon rises, they shall become Fantôme. (Source: Official Site)

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.

Ninth season of Cardfight!! Vanguard: D Series.