Forced to be Empress — Episode 15

Natalie Summers, a traditional medicine doctor, wakes up as the kingdom's most useless princess. Seeking peace, she finds her fiancé cheating with her manipulative half-sister. Attempting to stay low-profile, the world forces her to become a brilliant scholar. Her handsome companion turns out to be a spy. Seeking a powerful ally, she is tricked into marrying an untamable prince. Destiny forces her onto the throne as Empress.