The Battlefield Saint: I Was Made to Marry a Duke Knight in Place of My Little Sister, but I've since Found Happiness

Name: The Battlefield Saint: I Was Made to Marry a Duke Knight in Place of My Little Sister, but I've since Found Happiness
Author: Reiichi Akagi

戦場の聖女〜妹の代わりに公爵騎士に嫁ぐことになりましたが、今は幸せです〜