After losing to Aichi, Kourin goes to Card Capital, asking for Kai. Since Miwa is the only person who knows where Kai is, he rides with Kourin to the Underground cardfight area. They find Kai, who is beating all the underground fighters to relieve his frustrations. Kourin soon challenges him to a fight, where Miwa and Jun get to sit in the middle of the action. While Kourin uses her Royal Paladin deck, Kai reveals his newly-modified Kagero deck, which focuses on Amber Dragons. As each of them are dealing damage to each other, Kourin confronts Kai about how it's his fault that Aichi has fallen into the power of Psyqualia, saying that Aichi only sought the power because he wanted to become stronger for Kai's approval.