社交界の毒婦とよばれる私～素敵な辺境伯令息に腕を折られたので、責任とってもらいます～

I've always been good at reading the room. That's why I'm now the villainess... so that my sister Marin can be the tragic heroine. If I do not accomplish such, Marin will have father take away my food. At today's event, the young lord of the Balgoa Marquisate, Rio, is in attendance. Of course, I know to throw wine on her dress just as she asked of me. I must make throw everyone into a fuss... at least that's how I thought things were going to go, but the young lord of Balgoa grabbed me by the wrist and suddenly- a snap. Thus began a dramatic meeting one could call a sort of destiny. (Source: MangaPlaza)