Nine months have passed, and Rin and his friends have finally defeated Satan, right in his home at Gehenna. When an unexpected situation arises, Rin is forced to take the throne in his father's absence. War ensues, and all of Assiah is ravaged by the atrocities of the conflict. Shiemi, now a full fledged exorcist, follows Rin on his quest to finally unite the two warring kingdoms.