"From the bosom of the golden lion, the companion of the sun shall be born." On the day of Aira Goldwyn's birth, the prophecy foretold that she will become Empress. However, on the first night with the Crown Prince... "Are you truly the lady spoken of in the prophecy?" The golden mark, said to appear only on the woman of the prophecy, does not appear, and the Crown Prince broke his engagement with Aira. Rumors begin to spread accusing Aira of being an illegitimate child, and relatives attempt to seize the family in the wake of her father's collapse. All the while, crippling headaches and severe insomnia render Aira helpless to fight back. Until one day. While visiting Twinveil, a social club in the capital, Aira meets a man who promises to cure her headaches. "I've found it. My cure." With the help of this man, Aira will regain everything she has lost. Not just her family's honor, but also her own.