D9 -Daemon Master of Lost Ark- (Volume)

is the first volume of the D9 -Daemon Master of Lost Ark- light novel series, written by Yu Ueno and Illustrated by Kokonoka. It was released under the Dengeki Bunko Imprint in January 2014.

Synopsis
Thousand years from the "end of the disaster" ── A continental faradice dominated by demons, magic, and a group of misrepresentation machines. The boy Soma signed a contract with the beautiful girl devil Merville and traveled the world together. He summoned the devil and searched for his real brother who destroyed his hometown. During the trip, the two stop at Derna, a city where a famous demon scholar lives. A foreign maid and a demon scholar like my father. There, they are involved in a big incident that shakes the city. The devil-possessed boy Soma and the girl devil Mel. The two do not yet know that the journey will hold the "fate of the world."

(source: Bookwalker JP - Translated)