Kakuriyo No Yadomeshi: Ayakashi Oyado Ni Yomeiri Shimasu.

Female college student Aoi inherited her deceased grandfather’s ability to see ayakashi. One day, while Aoi is feeding some ayakashi, a demon appears! He declares that Aoi’s grandfather owed a great debt, and as compensation, Aoi must marry the demon! Aoi refuses and decides to pay off the debt by working. (Source: MU)