Akuma no Mikata: Mahou Camera

is the first volume of the Akuma no Mikata light novel series, written by Hisamitsu Ueo and Illustrated by Kaori Fujita. It was released under the Dengeki Bunko Imprint in February 2002.

Synopsis
Kou Dojima, a high school student with a slightly unusual past who says, "My sister was kidnapped by an alien." What suddenly appeared to him was a strange (?) Fashion girl who just wrapped a colorful enamel belt around a key point, and was a "self-proclaimed" devil. Furthermore, the "self-proclaimed" devil said, "Your wish was fulfilled the day before yesterday. I came to sense that magical power. To fulfill the contract and receive the soul." Can a devil without a devil really prove his innocence !? Or ... The 8th Dengeki Novel Grand Prize Silver Award-winning fantasy mystery is here!

(source: Bookwalker JP - Translated)