Why Would a Villainess Have Virtues?

I won't rest until they're dead. Charlotte has no qualms about murder if it means her beloved Prince Albert can ascend to the throne. But when he accuses her of treason and leaves her to rot in prison, she learns that loyalty is no virtue. 5 years later, Count Kaitel appears before her with a request: “Won’t you kill the emperor?” --- Charlotte had dedicated everything to the Emperor in the past... However, what she got in return was stone-cold betrayal and freezing loneliness. But, while she had been awaiting her death after being confined in prison, a questionable man appeared in front of her! "Could you help me murder the emperor?" Charlotte, who had danced with a sword for the Emperor, meets Ruslan and is reborn as 'Juju.' Now, her sword is directed at the Emperor. And the two who had met as comrades start bearing feelings that go beyond just that... A romance that blooms in a revenge story that's extravagant and strategic! The story of the strong-willed and charismatic villainess, Charlotte! "Why would a villainess have virtue?"