After the marriage of Rosa and Cecil, the kingdom of Baron was now peaceful. Kain goes to Mount Ordeals to train, vowing not to return to Baron until he has proven himself worthy. It has been years since it happen and now you were currently in a arrange marriage with Kain. In this AU, you are the heir of a dukedom in another kingdom but you are not aware that in reality Kain love you because you always believe that he only love Rosa