Why You Don't Know It's a Girl? (2026)

Native Title: <a href="/802482-why-you-don-t-know-it-s-a-girl" title="여자인 걸 왜 모르지?">여자인 걸 왜 모르지?
Also Known As: Yeojain Geol Wae Moreuji? , Why Don't You Know I'm a Woman? , I'm NOT a Guy!? , Why You Don't Know He's a She? , 여자인 걸 왜 모르지 , 그놈은 예뻤다 , Geunomeun Yeppeossda
Director: Park Dhan Hee
Genres: Mystery , Comedy , Romance
Tags: Physically Strong Female Lead , Crossdresser Female Lead , Co-workers' Relationship , Workplace Setting , Adapted From A Web Novel , Office Setting , Death Of A Co-worker , Agent Female Lead , Heir Male Lead , Undercover Agent Female Lead (Vote tags)

여자인 걸 왜 모르지? ‧ Drama ‧ 2026

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An office romantic comedy that follows the story of a conglomerate heir and his new secretary, a former special forces officer now working undercover. Yun I Jun is a quirky third-generation chaebol raised in a sheltered environment who becomes a prime suspect in the mysterious murder of his previous secretary. When a new “male” secretary arrives to take the position, he has no idea that she’s hiding a major secret. To uncover the truth, Kang Jae Hui, a former special forces officer turned police officer renowned as a “human weapon” for her exceptional strength and combat skills, disguises herself as a man and goes undercover as Yun I Jun’s personal secretary and bodyguard. While protecting him, she secretly investigates him, setting the stage for unexpected chemistry, hidden identities, and plenty of comedic tension. (Source: Korean = Naver || Translation = kisskh) ~~ Adapted from the web novel "Why You Don't Know It's a Girl?" (여자인 걸 왜 모르지?) by Lee A Yeon (이아연) and Ryu Do Ha (류도하). Edit Translation