Sabaku no Kuni no Amefurashi Hime: Zense de Shokei Sareta Mahoutsukai wa Nouka no Musume ni Narimashita

In this desert nation, rain falls only when a young farm girl named Alyssia sleeps. Fearing what would happen if her gift were discovered in a land where water is a precious commodity, her parents have kept her hidden from the world. But when Alyssia meets a mysterious boy, she begins to uncover the true, hidden power behind her rainfall. (Source: Manga UP!)