Since I can only find reviews from almost 10 years ago, I will provide a fresher set of eyes on this manga series since it's finished. I'm no manga critic but I can say that this is probably one of the better short mangas that I have read in a while.
Hatori really did an excellent job executing the plot, and her character development was great considering she only had about 17 chapters to do it. Short stories don't have to be complicated or unique to be good. While the premise and the actual characters are very basic, Hatori is able to make it an enjoyable read.
I noticed while I was reading that Hatori understood that it was a bit of a cliche and acknowledged that through direction of the character development, making them act in less serious ways than one would normally think (for instance, the fact that Touya is an ANEMIC vampire and how Chiyuki always teases Touya instead of being hopelessly distraught by her feelings).
This story isn't a "true work of manga genius" in the way that many may think. It displays Hatori's skill in character development (for sure) and her ability to incorporate a more realistic touch in a story based in fantasy, making the reader think "yeah, this seems possible". (She only adds a little fluff in the end)
As an Ouran High School fan, I really appreciated reading something else of hers and would really recommend it to others who enjoyed the Ouran manga and even the anime. I love her drawing style <3
P.S. ~ Whoever reads all of this is really super mega cool 'cause
1) You like old manga (or are at least considering reading this)
2) You read all that I wrote, which is pretty ridiculous for an 18 chapter manga...