As Sensei and Soya recover from the fight and the side effects of Cat Doping, Soya sees a flashback of Ginko as the Princess of a planet named Riel, being attacked by soldiers from Sirius, when Sensei steps in to stop them. Suddenly, the Sirius soldiers are called back to their home planet to defend it from a gigantic dragon. Ginko and Sensei head to Sirius as well to stop the dragon from destroying the planet, but arrive too late to save it...