Min-chul and Yoon-suh are a couple in love. Suddenly, Yoon-suh wants to break up. Min-chul wants to get back together with her, so he tries to arouse her jealousy by hiring a fake girlfriend. Min-chul and Cho-hae have broken up over sex, and he immediately dumped her. Cho-hae longs for love, so she starts working as a side-job as a fake girlfriend. On her first day with Min-chul, she befriends Yoon-suh in front of him. As this goes on, his attraction to Cho-hae grows.