Business for Love: Dressed as the Male Protagonist's Scheming Ex-Girlfriend

Tang Zhen accidentally slipped into a book and was forced to play the role of a superficial money-worshiping ex-girlfriend in order to survive. Three months later, she had to break up with the aloof academic tyrant Ren Yanjing. She "acted like a monster" in order to complete the system's tasks, but because of her good nature, she made things worse, and instead made the male protagonist, who had zero love experience, fall deeper and deeper into the trap. When the breakup time comes, how will this love that started with a lie end?