Astria leads a peaceful life as the guardian of the eternal sanctuary, but her world is turned upside down by the arrival of a nearly dead stranger. This stranger is none other than Duke Earhart, the empire's youngest and most impressive sword master. Astria uses her mystical powers to revive him, though they only have a limited range.
Moved by Earhart's situation, Astria decides to accompany him into the human world. By chance, she is mistaken for a duchess and begins to adjust to her new environment. Can Astria find the love she desires and end the curse that plagues her?
