There seem to be no reviews for this manga, so I guess, it's my turn to be the first. This is, however, preliminary, since the manga is not finished at the time of writing.
The basic premise is fairly simple. It's a yuri story about Japan's most powerful exorcist having a mutual crush on one of the country's most powerful ghosts. Other powerful ghosts and tear-jerking side stories ensue. I'll shut up about the rest so as not to spoil you the fun.
If you love yuri, I definitely recommend this manga. It mixes comedy, romance, slice of life, drama, mystery, ecchi, and even a little bit of horror in almost perfect proportion, never overwhelming the reader with one of those parts dominating over others but instead making them work together in harmony. It's not mind-blowing or groundbreaking, but is a very entertaining read that plucked all the strings of my silly himejoshi heart. It is very well written, and it's quite clear that the plot is really thought-out. The art is bliss for my poor eyes. I do hope the whole thing doesn't derail in later volumes. So far (I've read two volumes), it's so charming I could squeak. Not a masterpiece, but it's most definitely not a waste of time for any yuri lover.