It is incredibly short and incredibly sweet. Like seriously, it is short. I have read a few one shots already, and this one is by far the shortest, only like 17 pages. Seriously, it will probably take more time to read this review than to read the manga. Plus, it is worth it. So, stop reading this review, and go and read the manga. If you are still reading this review, I am kind of happy. Thanks. I feel that the hugest drawback of this manga is the length. I have already mentioned several times that Christmas ni Omoi wo Nosete is short, so short thatthe title is longer than the actual manga. If you did not realize, that was a joke.
Anyways...
As I was saying, the length made it upsetting. You do not get to know the characters that much. There is no back story. And just forget about side characters, in the end, they are mostly unimportant.
While I am saying it is the largest drawback, do not let it stop you from reading the manga. As I began with, it is short and sweet. It does not take much time, and the little it does, is a good price to pay for the art and story.