
Summary: The story takes place after an abominable war that foisted a "devil's contract" upon a land. Cecily Campbell, a former noble's daughter who joined a knighthood, encounters a man who dispatches some hoodlums with one sweep of a mysterious sword. The man possesses the power of the same "devil's contract" that has become taboo, now that peace has been restored. Cecily has been searching for a blacksmith who can repair an old sword she inherited from her father, and that mysterious young man happens to be blacksmith named Luke. This encounter launches their adventures together.
Stolen from Mangaupdates which stole it from ANN.
This series has a manga and an anime.
Personally, I think it looks like a solid, fun story. There are currently 7 volumes out.

