The protagonist has been reincarnated as the true villain who is destined to destroy the nation in "Ayakashi Teito to Hana no Miko" (Ayakashi Imperial City and the Flower Maiden), an otome game set in a Japanese steampunk world of steam, gears, and Taisho Romance. Now, she desperately strives to avert the impending tragedy.

However, as she attempts to prevent various problems using her game knowledge, her favorite character (oshi) dotes on her in a way completely different from the original story, and the plot increasingly diverges from the source material. This is the tale of a villainess and her fiancé, who reach the eve of their wedding without any problems or misunderstandings having transpired.