Manga vilainous adventurer elf slave

I came across this manga by way of the anime based on it, and once I had exhausted the available episodes I found the manga online to find out how the story developed.This is a charming love story between a powerful magician and a beautiful elf woman whom he buys at a slave auction after a severe case of love at first sight. Not a very promising beginning perhaps, but the relationship between the two develops slowly and with considerable restraint as they each come to terms with their feelings for one another. Add in a bunch of other colourful characters and some political and other machinations in the background, along with some excellent world building and you have a very enjoyable story.