The Noble Lady's Magnificent Revenge Through Reincarnation

"Please... I don't... want to die..." The last thing I saw was my younger sister's face, smiling with such joy. And so, I who should have died after having my head cut off have somehow looped back to the past!? ...Ah, if things continue like this, I'll be killed by my fiancé whom I loved and the younger sister who set me up. Such a thing must not come to pass. Besides, merely avoiding death isn't worth it. Ah, I want to make those two experience even a fraction of the suffering they inflicted upon me... I must take revenge. Against those two who drove me to my death. A revenge so thorough that they will never dare show their faces before me again――