Deus Machina Demonbane

Kurō Daijūji is a private detective in Arkham City, down on his luck and dead broke. He gets an offer of work from the Hadō Financial Group to track down a magic book. He turns down the offer at first, until he sees the more-than-handsome reward they are offering upon completion. Not long after, he runs into a small girl named Al Azif, who is in fact a powerful grimoire. The two of them form a contract, with Al Azif granting Kurō powerful magic, and soon after activating a powerful giant mecha k...