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• Drama: She Would Never Know (English title) / Sunbae, Don’t Put on That Lipstick (literal title)
• Revised romanization: Sunbae, Geu Lipstick Bareujimayo

• Hangul: 선배, 그 립스틱 바르지 마요
• Director: Lee Dong-Yoon
• Writer: Elise (novel), Chae Yoon
• Network: JTBC
• Episodes:
• Release Date: January 18, 2021 —
• Runtime: Mon & Tue 21:00
• Language: Korean
• Country: South Korea

Synopsis

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. (Asianwiki)