Watashi ga Shinde Manzoku desu ka?

The news of the accidental death of Lady Rorona Ryus arrived just one day after her fiancé, the Crown Prince, had called off their engagement. Rorona had been condemned for crimes she didn't commit—falsely accused of tormenting her younger sister—yet she had accepted the charges with startling indifference. They say her body was discovered inside an overturned carriage on a suburban road, her face crushed beyond recognition. Upon hearing of her death, Rorona’s sister rejoiced. "Now the Crown Prince is finally mine," she thought. The Crown Prince merely laughed. "I wish she’d died sooner," he remarked. However, they were blissfully unaware of one thing: Rorona’s death would bring far more than just "good fortune" to their doorstep...
(Source: Alpha Manga)