Vampire's Scream

Tae-hyun, a vampire count, meets the female protagonist through a political marriage, but the female protagonist's older sister ends her sad life with Tae-hyun's older brother, and the female protagonist is a more vicious demon than expected who comes in to seek revenge?! Thus begins the female protagonist's revenge and the heart of Tae-hyun, who she liked, is stolen!! Who will scream!!