Siena Argent, the only princess of the empire, has everything from birth. Smart brains, superb beauty, and superior talent. To the position of successor to use the crown of the emperor in the future. One day ahead of her 20-year-old birthday. She begins to dream and sees her future decades later. She is grateful to God, rejoicing that God’s blessing has given her the power of foresight. However, the future you see in your dreams is increasingly strange. The future that Siena vaguely drew was not like this. His half-brother’s counterattack, who despised him for being half blood. The hidden image of a mother she believed as her absolute ally. And the appearance of a man who has a powerful influence on Siena, both in reality and in the future. Everything around her starts to change drastically, and she changes too.