"Crazy Shadow": ancient times, beautiful and powerful.
(Pseudo)brotherly writing. One was a prince and crown prince, and the other was a lonely man in the cold palace, but they met unexpectedly and fell in love with each other from then on... Years later, what made the beautiful brother Kaiya forget the Dilqi who had innocently vowed to become his queen? What pushed the disgraced young man who was once so close to happiness back into darkness? And what made him willingly exist as an illusory shadow beside his emperor without asking for anything in return?