Drama: She Would Never Know (English title) / Senior, Don't Put on That Lipstick (literal title)
Director: Lee Dong-Yoon
Writer: Elise (novel), Chae Yoon
Release Date: January 18, 2021 --
Runtime: Mon & Tue 21:00
Plot: 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.
Drama information and poster from AsianWiki
You can watch at IQIYI