From my past experiences with anime, I got to say that this anime is truly amazing in it's own way. This anime grabbed my attention because of it's style. But even I got to say, I was debating on wether to watch it or not. Everyone knows that you should never judge a book by it's cover. Or in this case, you should never judge an anime by it's art. But in the end I watched it.
As i watched the whole anime, I noticed that it didn't really have a good character development, so I was confuse for some of the time. I also noticed that the story didn't really have an exact plot. It really was just about an adventure with a 12 year old boy who had a contract with a demon.
But don't mind the factor above. This anime is excellent and I recommend it to those who like dark humor and twisted fate. But it's also have a sadistic flavor to it. In other word, this is a dark anime. And just the way I like it, it doesn't have meaningless bloody scene that tries to be a wannabe horror movie like many anime out there. This anime is creative yet cute at the same time.
I hope you enjoy the anime if you watch it.
-Serey