I should note first that this is in fact a sequel to another manga named Yurara, but you really don't need to read its predecessor to get it. There's a cameo appearance that would make more sense if you did, as well as some background to one of the characters that might have more impact if you read the prequel rather than the recap provided in Rasetsu no Hana. However, in my opinion, this sequel outshines the original, which I found not nearly as compelling. I also read Rasetsu no Hana first, and it wasn't a problem.
I love this this manga. I can't say that the writing is perfect, but the central plot thread is so well conceived and deftly executed, that this one really stands out in my mind as a really outstanding manga. The plot is a framing to discuss heavy topics like assault and past trauma in a figurative sort of way. These are subjects frequently used for melodrama in shoujo. I feel Rasetsu no Hana is unique among those I've read for not using them for melodramatic reasons, but handling them deftly in a way that's both central to the story but by no means making it the only thing that defines a character. It's smart in a way I don't expect from shoujo.
In addition to the central conceit, I really love the main character, Rasetsu. She's strong in a way that's uncommon in shoujo. She's their business's primary exorcist, and she really does the a lot of the work herself, rather than sitting back and relying on the male characters. But despite all her strength she has an underlying fragility she tries to hide, which makes complete sense given the background that's gradually revealed. She's also got plenty of character quirks, making her a very unusually vibrant protagonist character for a shoujo.
Lastly, the art is pretty top notch.
In conclusion, I definitely recommend it.
