This show is depressing to watch.
It revolves around two sisters living by themselves together, but the older (adult) one keeps spending all of the money on manga, so the younger and more responsible one (in elementary school) is always upset. While the elder sister isn't necessarily malicous, she's so irresponsible that she's very hard to feel positively about, even if it's played off as a joke. This is pretty much the entire show, and it just gets repeated over and over.
I'm not sure how (or even if) this was supposed to be funny, because it was just sad to watch. It's kinda painful, because you just spend most of your time pitying the kid. You can clearly see that it's gotten so bad that she has a warped perception of what normal people can afford. It feels like watching nearly an hour of child neglect, if not abuse.
Also, I don't know why they made this a spin-off to Lucky Star. The only connection between them seems to be brief character cameos. This could easily have been its own series.
The art style is what you'd expect from Lucky Star, and the OP is pretty nice, but it doesn't make up for its faults. In the technical department, everything feels okay. Not great, but nothing bad.
tldr: writing is repetitive, but the technical aspects are okay. may likely be (mildly) depressing to watch
overall rating: 4/10