London, England in the 19th century. Duke Andrei of Sterling, who held the title of First Noble, and his wife, Lady Margaret, had a daughter, Gloria, with blood-red eyes. On the day Gloria was born, seventeen people died in the entire Sterling Castle. Although the murderer was captured, Gloria was also named "Miss Bloody". Gloria, who had lived in an excellent environment since she was a child, had the highest material enjoyment such as money, power, popularity, etc. Unfortunately, she did not have a heart, a kind heart that human beings should have. Coupled with the confidant beside her - the almighty Belika, she is basically a devil wearing a gentle mask...