ao no exorcist rin and yukio

Rin Okumura and Izumo Kamiki are attacked suddenly by an unknown demon in the Cram School, but are saved by the timely intervention of Yukio Okumura. shinobi no ittoki kotetsu Meeting with Mephisto Pheles, the exwires are informed that a demon called Gufu had somehow infiltrated the academy and that they were to inspect the barrier