The strongest duke's daughter wants to marry the exiled mage

The daughter of a duke, Fraurina, promised to marry Reynold, a genius magician who saved her life from illness when she turned 18. Ten years later, Fraurina, who somehow gained cheat-level powers during her bride training, visits Reynold, only to find that he has been framed by a political enemy and exiled to the frontier, losing the will to live.