Emmeline is the only direct descendant of the Margrave of Garrett, whose powerful magic protects the boundary between the monster and human worlds. However, for some reason, she lacks magical powers. Because of this, it is her duty to marry Damian, who possesses strong magical powers, and have children with him. However, Damian is a man who constantly threatens to break off their engagement and belittles Emmeline. Her only emotional support is Emmeline’s personal bodyguard, Bart, and her maid, Alma. Bart secretly has feelings for Emmeline, who continues to endure unreasonable treatment out of a sense of responsibility. Even if their feelings are reciprocated, the two are in a relationship that can never be together! A love fantasy about broken engagements and differences in social status!