Rengoku no Trisagion

During the late 1800s, Thomas Alva Edison is known not only for his inventions but also for battling fallen angels that enter the human realm. While the church refers to such a role as an exorcist, Edison dubs himself an "artisan," using his innovative weapons for this purpose. Levi, the son of a noble family, becomes an orphan after an angel takes his parents. He chooses to join Edison, becoming his apprentice. Levi strives to prevent others from enduring the same loss he experienced.