"A slave who knows things only a noble would… Who is this girl, really?" Lilliette, once the Empress of the vast Pardinas Empire, was killed by her lover and found herself reincarnated in the body of a nameless slave girl, roughly 17 years in the past. Choosing death over a life of pain, Lilliette provokes a noble and collapses. When she opens her eyes again, standing before her is none other than Slarhan Bentiac, her greatest political rival in her previous life. Now bound as a slave to the same capable man he was then, Lilliette begins a strange new life. But… why is this man unexpectedly kind and considerate to me? Determined, Lilliette resolves to use the knowledge from her past to help Slarhan become king for the sake of the empire and to take revenge on the lover who betrayed and killed her: Clid.