After the Whole Family Was Wiped Out, I Was Reborn

The heroine was reborn and returned to three years before her murder, and discovered that her previous life was not a simple "best friend's betrayal", but a century-old conspiracy against her fate. And the mysterious man who personally took her life in her previous life was actually the only one who could help her. Core conflict: obsession with revenge vs. Desire for the truth; using him vs. Falling in love with him; killing him vs. Saving him