It's an ok-looking series with a neat premise. It's not that any of it is totally original, but it's done pretty well considering how short the series is, not to mention the short duration of each episode. I particularly like the opening theme. Not even in the top 10 in terms of my fav anime music, but it's worth at least one listen, even so. I had a good part of the story figured out half way through, but there were some elements that caught me by surprise, so I wouldn't say it's totally predictable. The series could really use a re-writing and expansion, much likewas done with Kanon with the remake Kanon (2006). There's some neat (albeit cliche) secondary characters that could have really been given some depth. As it is, only Junna, Senna, and Haruhi get any notable development. Even that's pretty shallow.

I guess the thing that really puts me off on my ability to really enjoy the story was the borderline-incestuous relationship between Junna and Senna. I understand the Japanese culture views siblings a bit differently than Americans do, but this was going a bit far, in my opinion. I'm just thankful this doesn't even get ecchi. I'd have had to stop watching otherwise. The final unfolding of the story makes everything a bit more clear, but it's still a bit disturbing. Perhaps I'm just not used to this kind of story, but still...there's a line...

Despite cringing at every cry of "Onii-chan!!!", I still managed to finish it. Again, I liked the story and think it's a great baseline for a good plot, but it needed more fleshing out and less "special sibling bonding". My advice: just try to follow the story and ignore the suggestiveness involved. Not easy, but it can be done.