I should first start by informing you that volume 2 is NOT a continuation of volume 1 but a revision. Personally, I think it's good enough to re-read it again but I enjoyed the first version better. Although, volume 2 is a re-write, the story is developed farther so I recommend that you read it.
The characters are fairly common with Choi Ha Ram as the female protagonist (violent and energetic) but the story, itself, is amusing and funny. The plot is slightly different from your regular shoujo manga especially because of the supernatural element and interesting twists that come along the way. I particularly enjoying watching Ha Ram and Yu Ga On's (ghost) relationship develop and like any good story, mysteries lie closer than you might think. Overall, it's a nice read. Time will be well spent.