Eveline, the only saint in the country, is condemned by the Crown Prince as a "Fake Saint" and has her engagement annulled. Furthermore, due to the schemes of her stepsister—who has become the new saint—she is sent to the remote "Cursed Knight" of the frontier. However, the one who greets her there is Christoph, the younger brother of the King and the hero who distinguished himself in the subjugation of magic beasts 10 years ago. Contrary to the terrifying rumors, Eveline’s heart flutters at the "unexpected side" he has been hiding――!?