Aya is a 17 year-old girl from a rich-family. Despite their wealth, she still feels lonely and thinks that maybe her destiny is just to be pretty and be married off to a man she doesn't even love. On her 18th birthday, she encounters an ancient scroll that transports her into a different world and obtains the power of The Vermilion Bird in order to save the realm that she landed into.  However, there is a major problem - the current princess of Crimson South also has the markings and power that of The Vermilion Bird.