Pop Star in the Palace

Superstar Rhea Lear is transported to the ancient Grandwyn Dynasty and must become empress within a month to survive. Using her modern talents, she earns the title of Concubine Virtue, wins the favor of the Empress Dowager, and helps defeat northern bandits. After exposing the treacherous Prime Minister Sweeney, she ascends the empress.
She reforms the harem, promotes education and repels an invasion. Revered as "Empress Rhea," she eventually returns to the modern world.