I tried looking for it and I could not find it really. Two things which could had happen is that its has another name or in any case you just can't find it online just cause. I don't know if its just a delusional that they just can't wait any longer but honestly I don't know which is true. if they do have a light novel well I can't find it as of now. It just might be its that its not translated therefore I don't know the original language of the title cause I don't know the language. In this case we can only wait patiently on whats going to happen.
Yeah, I agree.
Hi, I wasn't sure if I should recommend this or not so... http://www.mangago.me/read-manga/blind_faith_descent/ it seems that many people have commented on it having a novel as well as a manga although I searched I couldn't find it (the novel) which made me doubt it a bit. Perhaps you'll have better luck or maybe there isn't a novel... if so sorry for wasting your time.
(I'm typing it here because you may not find the novel)