Travis Bruno of Capsule Computers writes:
"Often when a light novel series becomes popular enough it is given an extra push with an anime adaptation and usually this is done in an effort to help drive sales for the source material even higher. The problem with this is that sometimes anime viewers are occasionally left in the dark when it comes to certain aspects. Invaders of the Rokujyoma!? currently sits at twenty one volumes in length and with Sentai Filmworks releasing the anime adaptation in the West, what can fans expect?"