Blue Exorcist: Kyoto Saga

Long ago, the demon known as the Impure King killed thousands before being defeated, and the Knights of the True Cross sealed away its left eye. When that relic is stolen from Academy grounds, Rin Okumura and Yukio Okumura become involved after learning that the thief has taken a child hostage. The pursuit leads Rin and his companions to Kyoto and into a wider conspiracy surrounding the stolen eye. At the same time, Rin faces tension within his own group now that his friends know he is the son of Satan, threatening the trust they need as the investigation grows more dangerous.