Zefagarudo

is a Japanese light novel series written by Jin Shibamura, with illustrations by Fuyu no Haruaki. The series began publication on February 10, 2008 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
Everyone very much Hello, this is Suganuma air. For the past fifteen years, I've lived a life where I can say "it's normal!", But about a month ago, a mystery called Ne Purgis Ya suddenly appeared. Due to the conspiracy of life forms, it has become possible to transform into Yuno as "Fang Vassal Zefagarudo". ... Yeah, I don't know what you're talking about. I don't really understand what I'm saying. But this is a fact. The world is full of wonders.