After My Best Friend and I Traveled Through Time and Became Siblings, We Changed the Law Drastically.

When I woke up, my best friend and I both wore clothes. I dressed as the prime minister's legitimate daughter and was forced to enter the palace to choose a concubine. She dressed as my brother and had to serve as an official in court. The emperor asked me what my hobbies were. I said: exercise, read, and play with mobile phones. He fell silent. Then he selected me into the palace. After entering the palace, I discovered—— The emperor looked at me more and more strangely. My best friend (now my younger brother) quietly told me: "Sister, he definitely likes you." Me: "Impossible. If you are tempted first, you will lose." The emperor heard it outside the wall and fell silent. Then he began a long journey to pursue his wife. At the same time, my best friend and I were not idle either. No one cares about cat abuse cases? I change the law. Women can only use rags during menstruation? I promote hygiene knowledge. The courtier called me a witch? My brother fought back in the court. Later, the emperor was poisoned and endangered, so he handed over all military power to me. He said: "If I can't wake up, I will give you the country." Me: "... You come back to life first, the law hasn't been changed yet." [Modern heroine × ancient emperor] [Best friend dressed as younger brother × King Rui chases his wife at the crematorium] [Marriage first, love later·Two-way secret love·Law reform·Red thread destiny]