The crown prince knows the after-stories for himself.
He will be more independent but also lonely, will be stronger as well becomes imperious, for a deeper understanding of human-being, he turns to trust no one but himself.
His kingdom will be that place "where the sun could reach", the curse is, for now, is to the future and all the past.
When the perpetual sun rises from the east, his glory will proceed for the borders to go further, and further more and more and more and more...
As each inch he proceeds, the land of his heart collapses a single bit into darkness, while the prince is sitting there, on his throne, until the last.
Then he will age, for his soul before his flesh. Just like every single kid who wastes their kindness in youth, the old prince on the throne will be so cruel that no one can reach.
It is then he finally becomes a king. The true king sees beyond from the cliff of the highest mountain, what he sees will bypass every inch of the kingdom he earned, and so further away from the long-lost lover in the dreaming childhood, he missed.
As the nightingale that flees, as the death always wins: First lost will be love, then all the loyalty and trust. The true king, at last, learning to know to respect the destiny and fate of himself, and of every single human being within the realm of his country.