Reborn, I Crushed Them All

A woman who passes herself off as the daughter of a wealthy family takes 8 billion from a coworker, then joins that coworker's boyfriend in pinning a crime on her and killing her. The coworker is Luna Carter. She comes back to life with the memory of all of it and decides that this time she will not be weak. The fake heiress sets a trap for her at an auction. Luna pretends to walk into it. When the time comes to pay, she takes out a child's watch to pay with, and the plan falls apart in front of everyone. The fake heiress pretends to faint, then tries to slip out, and Luna calls out both moves. Luna has also quietly sent for her uncle. He arrives and tells the room that the name the fake heiress has been using belongs to his own family, and that its real eldest daughter is Luna. The fake heiress is made to kneel and acknowledge as much.