It's just not very interesting. It looks ugly (especially with the poor CG), there's nothing noteworthy about the characters, and the plot just speedruns a few tropes. Anything unique or different about this feels like it gets thrown in for about 5 seconds and then just moves on -- in fact, the entire plot just runs through itself so quickly it's impossible to invest in anything that happens. As I mentioned before, the characters don't really have any personality traits; I couldn't tell you what separates Mattsu from Yanma, nor could I tell you why I'm supposed to care about either. It's far from theworst thing I've ever watched, but I don't really care about it at all and I'll probably forget about it by tomorrow. It just drags on for 10 minutes being mildly confusing, but not even confusing enough to remember or care.