After the heroine was reborn, she discovered that her eldest sister, who had no blood relationship with her, had been secretly in love with her. She discovered this through what she saw after her death. After her rebirth, she became the emperor with the help of her eldest sister, on the condition that her eldest sister became the queen. However, the country she managed was still destroyed. The eldest sister killed the king of that country to avenge her, and then established a new country to protect the people she wanted to protect and fulfill her unfulfilled last wish.
Concept: Love is gender-neutral