The Hidden Saintess

Many years ago, there lived a knight who loved a saint. However, wanting to not hurt the saint who wasn't allowed to have personal feelings, he made sure to keep a safe distance from her. Eventually, the saint died in his arms and the devastated knight swore, with bitter anguish, 'If you get a chance at another life, I'll make sure that you will no longer live as a saint.' After long 300 years, the saint was reborn. Will their wishes finally come true in this life?