Kishin Houkou Demonbane

A struggling detective named Kuro Daijuuji is hired by Ruri Hado from Hado Financial Group to locate a magical book. After being convinced by a generous payment, he agrees to the task. During his search, he encounters Al, a girl who is actually a potent grimoire. They form a contract that grants Kuro magical abilities. Shortly after, Al triggers Demonbane, a powerful device belonging to Hado Financial Group, to confront threats from the Black Lodge. This action initiates a conflict between Hado Financial Group and the Black Lodge.