Yoon Song-A (Won Jin-A) works as a marketer for a cosmetic brand. She enjoys her job and does it with vigor. Her dream is to start her own cosmetic brand. Meanwhile, Chae Hyun-Seung (Ro Woon) works with Yoon Song-A as a marketer. He becomes attracted to Yoon Song-A and tries to develop a romantic relationship with her. However, Yoon Song-A rebuffs his advances, because she does not see younger guys as dating partners.
Title: 선배, 그 립스틱 바르지 마요 / Seonbae, Geu Ribseutik Bareuji Mayo