Love in Disguise () is an upcoming South Korean workplace romantic comedy television series starring Yim Si-wan, Seol In-ah, Kim Jung-hyun, and Yeonwoo. Based on the Kakao Page web novel and webtoon Why You Don't Know It's a Girl? by Lee A-yeon and Ryu Do-ha, it tells the story of a former special forces officer turned detective who goes undercover as a man to protect and investigate a chaebol heir suspected of murder. It is scheduled to premiere on tvN on October 19, 2026, and will air every Monday and Tuesday at 20:50 (KST). It will also be available for streaming on Amazon Prime Video.
Cast and characters Yim Si-wan as Yoon Yi-jun A third-generation chaebol who becomes a prime suspect in a murder case at his company and goes into hiding. His life changes when he hires a new assistant. Seol In-ah as Kang Jae-hee A detective from a special forces unit who poses as a man and goes undercover as Yi-jun's personal secretary to investigate him. Kim Jung-hyun as Kim Si-hyun A lawyer in the legal team of Taegang Group and Yi-jun's best friend. Yeonwoo as Lee Hye-jung Secretary to the Chairman of Taegang Group. Hong Eun-hee Yi-jun's older sister.
Production Development The series is based on the Kakao Page web novel and webtoon Why You Don't Know It's a Girl? by Lee A-yeon and Ryu Do-ha, produced by CJ ENM Studios and Pitapat Studio, directed by Park Dan-hee, and written by Moon Soo-jung. The series' Korean title was originally (), then changed to (), before being finalized as ().
The script reading took place on December 17, 2025.
Casting In October 2025, Yim Si-wan and Seol In-ah were in talks to star. The next month, Kim Jung-hyun was cast to star, while Yeonwoo and Kim In-kwon were reportedly considering. By December 2025, Yim and Seol were confirmed to lead the series.
Filming Principal photography began in mid-December 2025, and concluded in June 2026.
Release Love in Disguise is scheduled to premiere on tvN on October 19, 2026, and will air every Monday and Tuesday at 20:50 (KST). It will also be available for streaming on Amazon Prime Video.
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