Mireille is the daughter of a bakery owner and her twin brother Fredrick was adopted into another family when they were kids but they remained in contact with each other by sending letters to each other. One day a letter from her brother said he was in love with another man's woman. She replied, provoking him to be a man and claim the woman as his. Two months later, a beautiful young man named Richard, claiming to be a messenger from her twin brother Fred, visits and tells her "I've come for you." When the bewildered Mireille resists, he proceeds to kidnap her! She learns that Fred has run and eloped with the crown prince's fiancé and now, it is now her responsibility to impersonate Fred who was the former Count of Bernhardt!

兄の代わりに男装して伯爵となった双子の妹、ミレーユ。激動の中、ついに身代わり生活に終止符！　さらに衝撃の結末が!?

再び“身代わり伯爵”にされたミレーユ。今度の任務は、隣国の女公爵（特技：呪詛返し）の婚約者を演じること。彼氏いない歴＝年齢と、恋愛に免疫が全くないミレーユ（そもそも女）は、このピンチをどう切り抜ける？

護衛騎士のリヒャルトと贈る、天然同士の淡~いラブも増量中！！　奇人変人と美形と筋肉をスパイスに、大爆笑とちょっと涙の王宮王道ラブファンタジー、待望の第４巻！

落ち込んでる私（ミレーユ）にちょっかい出したらどうなるか、分かってる！？…男らしい乙女の執念で挑みます。美形でナンパな怪盗捕縛！

自ら巻き込まれたシアラン王家にまつわる陰謀とは！？いちゃいちゃ指数盛り盛りの変態胸キュン王道ファンタジー、ついに完結！