At long last, Kai faces off against Aichi! But if Kai loses, he, Ren, Leon, and Naoki will become the new Quatre Knights to watch over a sealed Aichi! On top of that, Aichi whips out his powerful, corrupted avatar... Blaster Joker!

A year has passed since Aichi and company returned from the moonbase sanctuary. Aichi and Naoki are going to be seniors, while Kai, Misaki, and others are graduating. What lies in their future? What paths will they choose? Aichi is dying to ask Kai those questions, but can`t seem to find him...