She Would Never Know () is a South Korean television series starring Won Jin-ah, Rowoon, Lee Hyun-wook, Lee Joo-bin, and Lee Kyu-han. Based on the 2017 web novel Senior, Don't Put on That Lipstick by Elise (Elize), it premiered on JTBC on January 18, 2021.
The series tells the story of people working on the marketing team of a cosmetics brand. The love story focuses on the senior/junior relationship of Yoon Song-ah (Won Jin ah) and Chae Hyun-seung (Rowoon). The storyline also include Chae Hyun-seung's sister, Chae Ji-Seung a dress maker, dating Lee Jae-Woon, a BM at the cosmetics company; and his other sister, Chae Yeon-Seung's relationship with her closeted husband, Kang Woo-Hyun and their young daughter, Kang Ha-Eun.
Pierce Conran of the South China Morning Post gave the series 2 out of 5 stars, noting that the drama "fizzles out" and ultimately disappoints after a promising start. He criticized the show for failing to capitalize on its office setting, writing that the narrative became a "tepid" and "conventional" office romance that lacked tension. Conran particularly pointed out the "sluggish pace" of the second half, stating that the series struggled to fill its 16-episode run as the conflict between the leads became repetitive and the supporting characters remained "one-dimensional."
The series is available for worldwide streaming exclusively on iQIYI at the same time as the episodes air on JTBC in South Korea, with subtitles in Chinese, English, Thai, Bahasa Malaysia, Vietnamese, Indonesian, Spanish and Arabic.