After breaking off the engagement, I was favored by the emperor and became the demon queen
She was the eldest daughter of the Medicine Order's Yan Family. She had been pampered since she was young and was kind-hearted. Unexpectedly, a calamity descended from the heavens and her family was destroyed. She was tortured to death. After a rebirth, she became the Eldest Miss of the West Lan Nation's Marquis of Rong 'an's estate. She swore that she would send all her enemies to hell. Hatred overwhelmed her rationality, and she became stubborn and cruel. Her hands were stained with blood…The old woman in the residence was disrespectful to her." Bury her!" Her fiancé betrayed her." Another day I want to bury him!" The aunt schemed." Bury her son!" An Emperor who was preparing to become a monk did not know that his life was already in the hands of others. Many years later, the Emperor was glad that he still had some looks. Otherwise, he would not have been able to return to the Palace alive. The Emperor thought that he was already violent and cruel enough, but he did not expect that the little woman he had accidentally provoked had a vicious look in her hair. He had provoked her, so he would spoil her. She wanted to investigate the Yan Clan's extermination case, and he handed over the Supreme Court and the Ministry of Justice. If she wanted to be pampered alone, he would leave the harem empty for her. She wanted to take the head of the Northern Yan Emperor, and he had mobilized the entire country's military forces to guard the border of the two countries to protect her...
You cannot find a better Naruto fanfic than this one.