Futsuma Gakuen no Mitralka

is a Japanese light novel series written by Mikawa Ghost, with illustrations by ukyo_rst. The series began publication on October 10, 2013 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
Exorcist - It is the chosen priest who embodies the believing God and Buddha spirits and fights the Deal with the Devil.

Takuma Aizawa hits the door of "Exorcist Academy", which trains exorcists, even though he has no faith. There, he met Mitra Luka, a girl who had great power but was regarded as a believer of evil spirits and was forbidden to do so. Protect the "world's strongest saint" from enemies aiming for contraindicated power.

The battle of apostates who do not have a god to believe has begun.