Sabaku No Oujisama

From Blissful Sin:
The third Prince of the Ababida Kingdom is being pressured to marry. The Prince detests the idea and after deciding to run away, he finds himself stranded in the desert. Here he’s rescued by Haruto, a kind Japanese tourist in search of the Rose of the Desert. The Prince is instantly smitten and Haruto leaves with no idea of how his life is about to drastically change.