Synopsis: The Duke's Daughter's Mission to Seduce the Demon King～Humanity's final gambit: a political marriage with the Demon KIng! ...Hang on, but what am I supposed to do if the Demon King is a girl!?～

Kōshaku Reijō no Kōraku Misshon ~ Maō to no seiryaku kekkon ga, jinrui saigo no kirifuda desu!... tte, maō ga onna no ko no baai wa dō sureba ii no desu k / 公爵令嬢の籠絡ミッション～魔王との政略結婚が、人類最後の切り札です！…って、魔王が女の子の場合はどうすればいいのですか！？～ Five demons launched a war against humanity, destroying more than half of its lands. Among them, the Demon King, who has killed more humans than any other, and a duke’s daughter enter into a political marriage, bringing the war to a temporary ceasefire. Cecilia, the duke’s daughter, sets out to win over and ensnare the Demon King, hoping to prevent the extinction of humanity. However, the Demon King is hiding a major secret…?