Ni-kai no Youkai Oujo 3

is the third volume of the Ni-kai no Youkai Oujo light novel series, written by Ryuji Arai and Illustrated by Kantaka. It was released under the Dengeki Bunko Imprint in January 2006.

Synopsis
The princess who bundles the demons, the superhuman Kongo demon, the thunder beast girl Rai who controls electricity, and just a high school student Yukito. The "Mysterious Case Counseling Center" opened by the four of them is still receiving requests to investigate strange cases today. What is the terrifying secret hidden in the classic camera that Yukito's senior Takako got? What is the identity of the giant shikigami that rampages in a new residential area at night? Yukito and his friends set out to investigate. The third installment of the popular youkai comedy series is finally here.

(source: Amazon JP - Translated)