Saigo ni Hitotsu Dake Onegai Shite mo Yoroshii Deshou ka

The engagement between Scarlet, a noblewoman from a ducal family, and Second Prince Kyle was suddenly annulled during a ball. She had been falsely accused of harassing a girl called Terenezza, daughter to a baron, whom the Prince doted on heavily. Condemned by everyone around her and forced to burden all manner of crimes, she finally decided enough was enough.