She Would Never Know Season 1 It is an office romance about female senior who doesn’t want to catch feelings for younger men and male junior who are handsome, sexy and has a straightforward style.
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.