Sister-Guarding Madman in Fantasy City

The prehistoric world has returned, and the saint of the era has been determined After tens of thousands of years, I met my sister again. In this life, I am still an emperor. And my sister will definitely become the first empress. The ancient saint returns to protect his sister's growth and accompany her in this world with feelings that transcend blood. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.