This manga is one volume, but is divided up into several one-shot stories that are sometimes related. The stories are random and there isn't really any continuity. It's not interesting to read. If one or two of these were tweaked they could be cool horror one-shots, but alas they throw in some humor and ruin that mood.
Nothing special. However, I'm a fan of the few horror scenes. Very creapy looking.
We don't learn much about them and there is no development. Two characters appear in most of chapters, but most appear randomly. Two others appear randomly for one story and then are not seen again; I wasn't even sure it was part of the same manga until the last panel.
Although sometimes a bit funny, it falls short on actually being entertaining. It should have tried to concentrate on good one-shots, or linked them all together. However, the author couldn't stick with one thing and ended up with a mix of horror, comedy, and a bit of drama/romance.