Idk if its manhua or manga idk the differene but theres a manga where the protagonist dreams about her future but since shes considered a demigod, an andestor of a god i think it was, but they shouldnt be able to dream. Also the ml has black hair and is ruler of an organization. Its a fantasy manga. Oh and the fl has greyyy hairrrr... Plus she has a half brother working with the ml to become emperor. This is basically what I remember of the thing.
I LOVE THEM SO MUCH THEY FINALLY HAVE THEIR HAPPY ENDING.