I recommend reading this if you are deciding on whether or not to watch this anime. I'm gonna say straight up that this is not worth watching just by itself. This anime doesn't present any normal or acceptable storyline that would have any significant meaning. It is basically just a trailer for you to read the light novel. Still, I have to admit, the idea presented here is kind of intriguing: the middle schoolers of an unknown school are armed and decide to protect some kind of cube that decides the fate of Japan. They are now hunted or rather pulled into war with some otherunknown soldiers, who seek to obtain this sort of 'cube'.

This 'anime' or rather trailer for the light novel has decent animation, good choice of music and good sound quality, yet lacks a conclusive storyline or multidimensional characters.

If you are intrigued by the idea of middle schoolers having a war with some 'evil guys', potential for some romantic development (that's the hint I got from these few episodes, though I haven't read the light novel) and a mysterious story, then go ahead and read the light novel cause you'll probably like it. I haven't read it, but it seemed intriguing, this by itself though can't be counted as a 'watchable anime'.

Thank you for reading!