[Yandere! Noble! x Female! Reader!] Marquess Vitleius had many secrets, one of them being why he had saved you from the streets so many years ago. Your seemingly unstoppable Marquess brutally met his demise in his office and only then was it clear - all those years of training was preparation for you to become his heir. Debuting into high society, you follow the tracks of Vitleius' life with help from the Dahlia Society of Spies to find his killer, encountering life-threatening situations, passionate lovers and unforeseen mishaps. Trying to find the killer of the man who saved your life was going to be more difficult than you thought with a bloodthirsty yandere tagging along.