Ryuu to Yuusha to Haitatsunin

"Hello fellow citizens. I am Yoshida the half-elf, working for the post office of the Imperial City of Idazig. My job is to deliver letters and documents to wherever you need them to be, whether it be a castle in the sky or the bottom of an abyss."

This is a comedy written by the biggest Medieval Ages geek, hitting the fantasy genre from an entirely new angle!