Emeraine is the sole direct descendant of the Garrett Baronial family, entrusted with the duty to protect the boundary between humans and monsters with powerful magic. But she inexplicably lacks magic. Because of that, she becomes engaged to Damian, a man with strong magical power, who uses the threat of annulment to demean her.

Her only solace is Bart, her personal guard knight, and Alma, her maid. Bart quietly harbors feelings for Emeraine. Even if their feelings are mutual, the difference in social standing may make it impossible for them to be together. Yet Emeraine resolves to survive humiliation and find happiness on her own terms.