They are brothers, twins, but they have been separated since childhood.
When we meet again, he is the most promising heir to the throne, and he is the abandoned and useless prince.
Their relationship is better than anyone else's.
Sleeping together, eating together, going in and out together, they have never been separated.
He stepped into the quagmire of political power for him, just because he protected him;
He ascended the throne of emperor for him only because he loved him.