This may be one of my favorite manga of all time.
In a nutshell, it's the story of a band of heroic, well, letter carriers in a dim-lit fantasy world who must brave rugged terrain and giant insect-like monsters to deliver the heart-felt sympathies of the populace. The story focuses on the highly empathic central character, Lag Seeing, who turns out to have a very special gift. But without spoiling ~~ there is soooo much more to this manga story as it explores the nature of government and the marginalization of people in the context of a magically magical magicness.
It is impeccably drawn with gorgeous line art coupled with a fantastic story in a masterfully developed fantasy / steampunk setting. Very original concepts blend with cheeky references to classic and pop icons. This manga makes you laugh and cry. CANNOT RECOMMEND IT HIGHLY ENOUGH!