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by Lily Alice, December 29, 2025
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tvN unveils new teasers for Undercover Miss Hong.

Undercover Miss Hong follows Hong Geum Bo (Park Shin Hye), an elite supervisor for the Financial Supervisory Service, who goes undercover as a 20-year-old entry-level employee at a securities firm after detecting suspicious fund flows.

The poster captures the dynamics between the four women — the residents of Dorm Room 301. The lineup includes Hong Geum Bo (Park Shin Hye), who hides her identity and goes undercover as a 20-something employee; Ko Bok Hui (Ha Yoon Kyung), sitting demurely with a women's magazine in hand; Kang No Ra (Choi Ji Su), wearing a bright, innocent smile while holding a cookie in one hand, with her unruly curly hair; and Kim Mi Suk (Kang Chae Young), whose warm smile betrays her kind and sincere personality.

The teaser highlights the roommates' distinct personalities. Hong Geum Bo volunteers to live in the dormitory — where key clues to the case are hidden — in order to carry out her undercover mission at Hanmin Securities, where suspicious financial transactions have been detected, and there she encounters roommates with very different personalities. 

Ko Bok Hui, whose sharp and decisive nature is hinted at through the abacus and women's magazines beside her; Kang No Ra, smiling innocently as she applies nail polish to her fingers; and Kim Mi Suk, wearing rubber gloves in the kitchen and flashing a smile — each set to share dorm life with Hong Geum Bo.

In the teaser, when Hong Geum Bo introduces herself as "Hong Jang Mi, 20 years old," Ko Bok Hui teases, "Twenty? Don't you look kind of old for your age?" Will Hong Geum Bo be able to uncover the clues to the case amid the eventful and chaotic dorm life in Room 301?

Undercover Miss Hong premieres on January 17. The K-drama will be available to stream on Netflix.  

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