Min-chul and Yoon-suh are a couple in love. Suddenly, Yoon-suh wants to break up. Min-chul wants to get back to together with her, so he tries to evoke her jealousy by hiring a fake girlfriend. Min-woo and Cho-hae have a break-up sex, and he immediately dumps her. Cho-hae longs for love, so she starts a side-job as a fake girlfriend. On her first day with Min-chul, she acts friendly in front of Yoon-suh. As this continues, his attraction towards Cho-hae grows...