Who's the cruel X

Baek Da-hee, South Korea’s top actress, hides the horrific wounds of her past behind a glamorous spotlight. She has only one goal: to take revenge on Shin Ji-yul, the ringleader who ruined her life during her school days, and her accomplice Go Min-jung. Deliberately approaching Shin Ji-yul’s husband, Choi Do-jin, Baek Da-hee becomes both an investor in his business and its official model, marking the beginning of her revenge. She skillfully buys off those around Shin Ji-yul and Go Min-jung, exposing their secrets one by one—affairs, murder, and slush funds—ultimately driving their relationship to complete destruction.