An excellent lesson of Japanese mythology presented in the form of a lazy girls attempt at a normal life. The story follows Tsukuyomi Sasami which I'm sure you thought was a normal girl at first glance but it turns out she has quite the story in her past which she is trying to bury inside her. I was impressed by the nonchalance which some characters in the series treat problems.
I enjoyed it very much due to the fact that I am a fan of history and Japan's history is a subject of great interest to me as well as its mythology which I knew nothing until I've watched this series and found out a lot of fascinating things by doing some research.
I will say this, its a very complex series for those of you with a slim attention span. It has comedy scenes, fighting scenes as well as interesting forms of mythology interpretation.
I reckon people who have read some books in their lives should have no problems following the storyline(I meant no offense).