Ao no Exorcist: Shimane Illuminati-hen

After the battle in Kyoto, Rin Okumura and his friends return to True Cross Academy, but demonic incidents are spreading across the world, and even ordinary people are beginning to perceive creatures that once remained hidden in Assiah. Meanwhile, Yukio continues to conceal his growing fear over the strange powers awakening inside him.

The situation erupts when Lucifer, King of Light and commander of the Illuminati, openly declares war on the Knights of the True Cross. His goal is to reunite the human realm with Gehenna and bring Satan back, and Izumo becomes essential to that plan. Rin and the other Exwires now face an enemy built not only on demonic power, but on advanced experiments, infiltration, and a conspiracy that reaches disturbingly close to their own organization.