The former lady of noble birth tells lies.

Yulia, the eldest daughter of one of the Five Great Noble families who once had contact with the royal family, became a commoner due to a certain incident and was living a new life as Mia, a girl working at a bookstore. However, one day, while delivering a book, she encounters Raymond, the nation's heroic knight and her childhood friend and first love. This becomes the catalyst for her to also reunite with another childhood friend, Royce, the king of this country, and his younger brother Francis...