第 20 集: Kai面對Kaoru Komatsubara，而Aichi意識到自己必須親自出戰。

In spite of Nagisa winning and her getting to marry Kamui as a result, Kamui weasels out by saying that Team Q4 as a whole hasn't lost yet, so their agreement is still pending. With one loss in their record, Team Q4 has to win both the next matches in order to advance through the regional tournament. Though everyone is certain that Kai will win, Aichi becomes increasingly desperate, as his match will be the one to decide the fate of the team, going as far as to thinking of running away to have Misaki participate instead. As Kai walks up to play, he indirectly tells Aichi that people who run away are not worthy of fighting him. His opponent, Kaoru "Ka-boom!" Komatsubara, seems to be a formidable opponent who gloats how he has gone to the national tournament before, but Kai gains an early lead, pushing Kaoru into a bad situation. Throughout the battle, Kai chooses to not defend against all except one of Kaoru's attacks, puzzling everyone about his decisions. Aichi believes that Kai is trying to tell him something through these actions; he deduces that Kai knows that he does not need to defend and will still be able to win. When both players are at five damage, Kaoru confidently declares that he will survive and claim victory, but Kai refutes that claim, loudly announcing "Final Turn!" He rides a new card, Blazing Flare Dragon, and uses Gattling Claw Dragon's skill to retire one opposing unit and increase the attack power of Blazing Flare Dragon. Kai relentlessly adds to its power by drawing two critical triggers in a row, thoroughly annihilating Kaoru. Seeing Kai's power, and remembering his own aspirations to reach his level, Aichi becomes motivated to win his fight! (Source: Wikipedia)

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