"Broken engagements and villainess stories are supposed to be about how an idiot prince doing that would cause a civil war—it's not supposed to be realistic!? So why does mine start with actual internal politics and losing a power struggle, followed by an escape from the guillotine?!"

"Villainess broken engagement" stories are usually supposed to be more... lukewarm, aren't they? I lived carefully without standing out, making sure not to become a nail that gets hammered down as I paid attention to domestic affairs. But then I got a little greedy and eagerly accepted the engagement with a marquis family, only to fall into a trap—engagement broken off → impeachment trial → the guillotine. What fate awaits me as I escape at the cost of my father's sacrifice!?