「腹黒系眼鏡美形、大好物ですありがとう!!」 地味で目立たない子爵家令嬢マリエルの婚約者として名乗りを上げたのは、なんと令嬢たちの憧れの的、近衛騎士団副団長のシメオンだった！ねたみと嘲笑を浴びせる世間をよそに、マリエルは幸せ満喫中!? 「一迅社アイリスNEO」で話題の婚約者とその周りにひそかに萌える令嬢の物語、スタート!! Plain and inconspicuous, she was high society’s unattractive wallflower. Even so, Marielle was proposed to. Moreover, her fiance is Sir Simeon, the popular knight of the Imperial Guard! Why is he with someone like her? No matter how much she was envied and scorned, Marielle was happy. Well, because his appearance was that of a calm, two-faced Adonis!