Gouman Sheikh no Propose: Shojo o Sasageta Kare wa Ouji-sama deshita

Yuka, a careerwoman, is in love with Jamil, the prince of a desert kingdom, Izdihar. When the two meet again on a work related project, he suddenly asks Yuka to marry him, saying “Be my queen!” At every chance he gets, Jamil passionately embraces Yuka in intense romance…?

Source: MangaPlaza