Time and Mu Xi

He is the proud son of heaven, deeply valued by the emperor, she is the daughter of a small official, and an imperial edict forcibly binds them. He already has his own heart, but the secular world can't find love. She has long been ordered by her teachers not to get too close to the royal family. However, she doesn't know the origin of her love. He unexpectedly finds that the person he loves is already by his side. However, the world is in chaos and the seeds of old hatred have been planted. How should he treat her when it is revealed?