Tsuihousareta Seijo wa, Suterareta Mori de Wakeari Biseinen wo Hirou

Leah, the second daughter of the Earl of Garfield's family, has been mistreated by her older sister Priscilla since she was a child, but at the age of 15, she was appointed as the Protector of the Realm and became engaged to the crown prince. However, just as she begins her happy life, she is ordered to defeat a demon as was her duty, and after two years of not being able to return home, Leah finally seals the demon and returns home, only to be betrayed by her sister and fiancé and exiled out of the country... Leah loses hope and accepts her death, but her fate is changed forever when she meets a beautiful young man in exile!