Yes My Lady -Toaru Shitsuji no Hisoyakana Kyoiku-

[Machine Translation] A story of a young lady and her butler, written quietly in some country in some time. -- The Viscount's family is a noble one, but the previous head of the family's family has been spending lavishly and the family is now on the rocks. Your father, the current head of the family, is eager to marry off his daughters to prominent families in order to protect the family. On the night of the coming-of-age celebration, you are told by your butler Kurosaki that you are to marry into a more prestigious family. In order to marry into a more prestigious family, you must learn how to use your body to win a man's heart. You were already prepared for this from your sisters who had married before you, but you cannot hide your confusion when you realize that Kurosaki, whom you have known since you were a child, is the one you are to learn how to do this. However, the orders of your father, the head of the family, are absolute. You will receive "night education" from Kurosaki... "

いつかの時代、どこかの国でひっそりと綴られた、お嬢様と執事の物語。 ――"由緒正しい家柄でありながら、先代当主の浪費によって傾きつつある子爵家。現当主であるあなたの父は、家を守るため娘達を名家に嫁がせることに躍起になっていた。成人を祝う宴を終えた夜、あなたは執事の黒崎からあることを告げられる。それはより格の高い家に嫁ぐため、「身体を使って男を虜にする方法を学ばなければならない」ということだった。先に嫁いだ姉達の様子から薄々覚悟していたあなただったが、その方法を学ぶ相手が幼い頃から慣れ親しんだ黒崎だと思うと戸惑いは隠せない。しかし、当主である父の命令は絶対。かくしてあなたは、黒崎から「夜の教育」を受けることになるが――。"