Ootaishi-sama wa Yume no Otome ni Go Shuushin: O Sagashi no Koibito wa Betsujin desu

The man she spent the night with is the crown prince of a neighboring country? She feels as if she's being swallowed up and melted by this melting pot of love! "Naughty girl, dangling a feast in front of a starving beast," the dazzlingly handsome prince whispers passionately to her. As his hands explore her, and they become entwined, her body and soul melt. Is this a dream? Or...? Meryl, the daughter of a marquis, witnesses her younger sister and her fiancé having a tryst at a party. She tries some alcohol she's not used to and wakes up to find herself in bed with a handsome stranger! The man she's with is none other than Elias, the crown prince of a neighboring country! Ignoring Meryl's pale face, Elias announces that he is engaged to Meryl and will bring her back to his country. But it seems there's a secret behind it... (Source: MangaPlaza)