CNYouku

A queen has twin daughters, one gentle and kind and betrothed to the heavenly prince, the other sharp and clever and promised to the demon prince. A mix-up sends each sister into the other's wedding, and each has to keep up a pretence in a strange new palace. As they navigate courts, rivalries and slowly growing feelings, the truth about their fates comes out. It is a bright, funny fantasy romance about sisters and switched lives.