This "Otonari ni Ginga" is a "yorudora" (similarly to an "asadora", many episodes - albeit not as many! - of fifteen minutes each, credits included) which, incidentally, also means that its target are the younger viewers (whereas an asadora would normally cater to a more general audience).
This was clearly visible in the story, which might result a bit (heck, even more than just a bit) too naive and simple for the older audience, as it's been the case of yours truly. Indeed, although I deeply appreciated the innocence and purity of it all - something one would actually expect from NHK, but nevertheless is always a nice "surprise" when compared to the ever-surging wave of "hollywoodian" dramas made in Japan - on the other hand, though, I'll confess the story was not really that interesting to poor old me, sorry...^_^;
Still, the acting was very good (Koyama Sae is so talented it's scary, seriously - how can she act so well at that age? >____<), the "packaging" totally ok, and the music decent enough.