Since there's hardly any information on this manga, I thought I'd better do a review^^ (btw, I've read the raws for all volumes, but only 17 chapters in english)
Dear is a mixture of romance, a very small bit of drama, comedy and action, with an art that keeps getting better with each volume.
The two first volumes are what make most people give up, because they revolve around the plot described in the synopsis (Chiruha and her secret, Kisara and his grudge). After that it gets much better. Another five main characters (from the prequel) are introduced, each with problems that will end up uniting them
all. The interaction between them is funny and cute, and the romance is very nice as well. A bit later in the story even villains will appear.
So if you were thinking of droping this because of the initial plot, read a bit more and you'll probably enjoy it!