She Would Never Know

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.