This manga is... surprising, to say the least.
I started this expecting something silly and stupid, and I did get something silly and stupid, but it was also surprisingly heartwarming and entertaining. In fact, this is the most refreshing depiction of an airhead I have seen yet. Her idiocy might be, more often than not, played for laughs, but the reason behind it is treated fairly seriously and is explained in a way that is (astoundingly) believable.
Of course, if you're looking for a serious work, this manga is not for you. It's a silly comedy, albeit a unique one, and it does tend to try too hard with some of its jokes. But, as mentioned, when it tries, it can be surprisingly heartwarming. Just, well, don't take it too seriously anytime else.
For those who have read 2chan threads before, well, this manga is exactly like one of those threads, obviously, since it was adapted from one. So, if you have enjoyed reading those crazy threads that start out silly and then turn out to be shockingly deep in the end, you should enjoy this manga too.
Oh, and the character designs are very adorable. I especially like Dokuo's face. It's fantastic.