A series that showed a lot of promise at first with an interesting contrast of a relatively grounded atmosphere and the weirdness of all the occult happenings in the plot. And the animation quality and overall presentation are frankly amazing.
Sadly it jumps the shark hard in the last few episodes, and not into fun waters, but into mediocre ones. Its alluringly unique tone is summarily thrown out, along with any plot cohesion and a lot of character development, to deliver a disappointingly generic, outright boring finale.
Despite so much wasted potential, fans of occult/mystery anime should still give it a try, as it is, if nothing else, very much its own thing.