[This is side-story / filler, Not main storyline / canon!]
Year – 30,540 of the Fire Cloud Calendar
The great empire that stood on the east side of the Fire Cloud Realm for more than ten thousand years – Heavenly Moon Empire was defeated and destroyed by the army of the overlord of the Central Profound Realm, the Yu Clan.
The small countries, kingdoms, and dynasties in the Fire Cloud Realm were all shocked. A great empire under the rule of the one of the seven major forces was destroyed just like this? And the major force didn't even ask for anything, and only waited for the person to leave from the Palace of the Heavenly Moon Empire.
However, there was a certain person who was left alive keeping him in the palace, and she was the princess of the Heavenly Moon Empire. It is said that the princess of the Empire is the most beautiful fairy in the world, but it was her bad luck to marry a useless person like Gu Lin.