[1] Based on the 2017 web novel Senior, Don't Put on That Lipstick by Elise (Elize), it premiered on JTBC on January 18, 2021.

[2][3][4] 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.

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.