Konyakusha ga Uwaki Aite to Kakeochi Shimashita. Ouji Denka ni Dekiai Sarete Shiawase na node, Imasara Modoritai to Iwaretemo Komarimasu.

The daughter of a minor noble, Amelia hails from a remote agricultural domain. From an early age, she has been engaged to Reese, who can provide the earth magic her domain needs. Though it was only meant to be a political marriage, they got along well—until recently. Since Reese began attending the Royal Academy of Magic, he's become oddly distant and stopped contacting Amelia. Now that it's time for Amelia to enroll too, she hopes to find some answers but she still can't get ahold of Reese, and it's tough to make friends among the upper-class students at the academy. Can anyone help her through this disheartening experience? A dashing prince, perhaps...? (Source: J-Novel Club)