The Abandoned Prince's Ghost Bride

Story

At the age of eight, Lucian is forced to "marry" an invisible ghost and live in her haunted mansion. Taking pity on Lucian, the ghost secretly cooks and cleans for him, only to discover he can suddenly see her! Once they're closer, Lucian names his ghost bride "Ria" and promises to officially wed her someday. But Lucian is later revealed to be a prince, and the two of them are torn apart shortly after. Years later, the little groom returns as a powerful emperor, ready to sweep his ghost bride off her feet at last.

Synopsis via AniList (English).