So, since this lovely manga doesn ´t have any reviews I will do my best to write one. This manga deserves it. So I will start with the most important question of all: Is this manga worth reading? To which I can only answer:Yes it is, but it's not manga for everybody. While this manga has lovely art style and cute looking characters it´s actually quite dark. It also is kinda hard to describe (at least for me), but I will try my best:
Story - It's about a girl carrying a coffin (Kuro) and her bat companion (Sen) who are travelling around in search for a certain witch. Very soon they encounter two catgirls - Nijuku and Sanju who join them on their journey. The story itself is mostly episodic. It's about what they experience on their journey, all the characters they meet and such.
Characters - This is a tough one. I'm not saying that they are unlikable. They are just kind of hard to describe. Especially Kuro herself. Sen likes to drink alcohol and chase pretty women. Nijuku and Sanju are naive and curious, for the most part. Kuro is a bit of a mystery.
Art syle - I loved it (How should you rate an art? Just check it for yourself and see if you like it.)
Enjoyment - I enjoyed it for the most part, though there were times when I had to take break from it for few days, because it was way too dark. Overall I liked it very much. It even had an appropriate ending.
So yeah, I recommend this manga for all those that like dark stories.