Well just finished watching the Anime Ghost Hunt
I found this quite enjoyable and too be honest a little scary. For those that remember the TV series Poltergist – The Legacy,
Its is very similar and has just enough scare factor to keep you interested. Its a shame the manga hasn’t got far enough for a secound season because it does deserve one.
In my opinion I would like to see a second series were Mai Taniyama (The leading lady) traveling with Monk and the priestess (Ayako Matsuzaki) to explore and understand her abilities.

If you like Anime and ghost stories this one is (IMHO) my recommendation.