I found it not so great to be honest. Circuses are known sources of creppy imagery (tm) for Junji Ito stories (just look at Gyo), and I have to say that this isn't a particularly scary, funny, or even charming take. The ringleader is a demon, people who join the circus die, and all the boys want to join the circus in order to woo this girl. Sure, whatever. It's a horror story that's not been told enough to be traditional but has been told enough to become derivative. Also, the iconography of the traveling circus isn't exactly native to Japan. Maybe that's the point, to make the events seem strange and unnatural, but it comes off either as forced or as carrying uncomfortably nativist implications.