I don't ever write comments for series, but this is one series that I feel very strongly about.
I wasn't particularly in love with the prequel, Yurara, so I was a bit skeptical about reading this sequel. I'm very very very glad I did. Unlike Yurara, Rasetsu is portrayed as a much stronger character and is much less frustrating that Yurara. Even the male protagonists are better characterized.
The storyline is captivating and always keeps you interested. I read the series through the Viz releases and after buying each volume, I was always desperate to get my hands on the next one. I was never bored due to the mystery and many questions Chika Shiomi creates (they're all answered by the end though). Even if the element of the supernatural is predominant, the story becomes strangely realistic in terms of the interactions between the characters. The development of love and relationships is built up realistically and believably, so it doesn't get frustrating or annoying at all, which is surprising for a shoujo manga.
I absolutely love the story progression, and the ending is perfect, but I can't deny that I wish it ended differently. This is one of the only series that had me tearing up (I don't really feel emotional when reading manga) at the end. It's bittersweet, but I wish it was just a little less sad (though, this is just my own preference). I loved the characters and had a personal attachment to them, so as much as the ending made perfect sense, it made me depressed.
Although I didn't feel super happy after finishing this manga, I'm satisfied (though I still want to cry). It's definitely one that any shoujo and non-shoujo fan should read. It doesn't disappoint!