Ep. 7: Kai warns friends while Naoki loses a cardfight against Phillip Neve at Hitsue High School.

7

Kai regains consciousness and attempts to warn his friends about the Quatre Knights. Meanwhile, Misaki and Naoki encounter Phillip Neve, one of the Quatre Knights, who is playing with cats including the Assista-cat in a park. Neve reveals his intent to stop them from finding Aichi and accepts Naoki's challenge rather than fighting Misaki. Neve creates the Steel Wall Prison field for their cardfight. Naoki gains an advantage using Legion with Brawler, Big Bang Knuckle Dragon, and Big Bang Slash Dragon, destroying most of Neve's rear-guards. However, Neve counters with his own Legion using Metal Borg, Sin Buster, and Uru Buster, blocking Naoki's perfect guard. This results in Naoki's defeat and direct damage from the prison. Kai arrives to stop Misaki from challenging Neve. After Neve departs, the trio visits Hitsue High School and finds a wounded Miwa, who was attacked by another Quatre Knight.