Rin is enrolled at True Cross Academy's exorcist cram school by Mephisto, the academy's chairman. He is shocked to learn that Yukio is one of his teachers, having already been a prodigiously graduated Exorcist. Yukio had always been aware that Rin was a demon. Rin demands to know why Yukio kept this a secret, and Yukio says he blames Rin for Shiro's death. After Rin protects Yukio from a hobgoblin, Yukio recalls Shiro telling him to protect his brother, which motivated him to become an Exorcist.