The Blue Wizard and the Prisoner of Azkaban

Rin and Yukio Okumura are getting ready to return to Hogwarts for their third year when they hear that mass murderer Sirius Black escaped Azkaban prison. Everyone thinks he's after Harry Potter. While everyone at school is keeping their eyes peeled for the escaped convict, the Okumura twins can't help but feel like they heard Black's name from somewhere.