Stop the Charade, I'm the True Heiress

Sinopsis

After discovering she wasn't their biological daughter, her adoptive parents and their daughter humiliated her in every way and kicked her out of the house. Little did they know, she was actually the long-lost daughter of the richest family in the city! Once her biological parents took her back, she decided to intern at their company. Unexpectedly, she and the adoptive sister started on the same day. Because she dressed modestly and rode an electric scooter while the adoptive daughter arrived in an expensive sports car, everyone mistakenly believed the latter was the heiress. Amidst these misunderstandings, how will she cleverly expose the true nature of her malicious and vain adoptive sister?