Kuzu ga Seiken Hirotta Kekka

is a Japanese light novel series written by Kusakabe Kasaku, with illustrations by Anmi. The series began publication on July 10, 2014 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
I have seen it. Mao Kurusu, a classmate, holds a "holy sword" and "practices" to defeat the "devil". Against a human model with a bamboo sword ... "This is the Demon King. Your ambitions have been shattered!" It looks like a beautiful girl, but it's a shame ... However, the situation changes completely. We have discovered a real holy sword that pierces a giant tree in the park. Kurusu, who climbs the tension eel, tries to make the holy sword his own, but the staff of the holy sword management section is chasing him from the government office in another world ...!