12 DEMONS

is a Japanese light novel series written by Akihiko Odo, with illustrations by Takeshima Satoshi. The series began publication on September 10, 2005 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
On the day of the school festival, 12 people gathered at the school with their feelings in their hearts. When they gather to inherit the power of the devil, all the conditions for the cursed ritual to resume are met ... "Take away those who want to live. Dedicate those who want to die. Fight until you are the last man." With that word as a signal, some chase, some run away, and some stand by. Who should I believe in and who should I doubt !? And what should I do? The time limit is midnight tonight. An overnight fantasy song has begun. Who will win the life-threatening game !?