I'm Known as the Poison Woman of High Society: The Handsome Margrave's Son Broke My Arm, So I'm Making Him Take Responsibility

I've always been good at reading the mood. So, I play the villain, just as my half-sister Marin wants, who wants to be the tragic heroine. If I don't, my father, who dotes on Marin, won't let her eat. Today, Marin's target is Rio, the son of the Margrave of Balgoa. "Okay, okay, I'll pour wine over...