Engraved Pleasure v.1.11

Robert (the hero) is a prince of the Kingdom of Corinth. Alieno (heroine) is an only daughter of a farmer in his territory. They agreed to enroll in a military academy
in two years. However, Alieno goes missing shortly after making that promise. Two years later, when Robert went to the academy, he found Alieno waiting for him there in the position
of a squire. Why did Alieno suddenly disappear and what happened during those two years?