A lot of viewers like this drama, but many viewers also get confused because the story throws you into a big corporate world with a dorm full of roommates, a powerful owner family, and regulators who keep digging. This guide is built for that exact problem, and this guide organizes every key figure by “team” so you can instantly tell who is protecting the company and who is trying to break it open. I also included the Undercover Miss Hong character relationship chart logic in plain English, so you can follow the tension without pausing every five minutes.
1. Drama Basic Info
| Genre | Period drama, crime, office, black comedy |
|---|---|
| Air Time | Sat–Sun 9:10 PM (KST) |
| Air Dates | Jan 17, 2026 – Mar 8, 2026 (currently airing) |
| Episodes | 16 |
| Network | tvN |
| Main Cast | Park Shin-hye, Go Kyung-pyo, Ha Yoon-kyung, Jo Han-gyeol, and more |
※ Streaming note: International availability can vary by region. Many viewers check TVING and Netflix listings depending on their country.
2. Undercover Miss Hong Cast: Main Characters
This Undercover Miss Hong K-Drama Cast guide starts with the four characters who shape the entire push-and-pull between investigation, power, and loyalty.
(1) Hong Geum-bo,Hong Jang-mi (played by Park Shin-hye)
- Hong Geum-bo is a financial investigator who specializes in tracking white-collar crime through numbers.
- People call her a “Yeouido witch” because she works alone, she trusts spreadsheets more than people, and she rarely compromises.
- When the investigation stalls after Hanmin Securities’ CEO Kang Myung-hwi dies, Geum-bo makes a risky move.
- She goes undercover as “Hong Jang-mi,” a 20-year-old entry-level female employee in 1997, to locate a hidden ledger tied to an internal whistleblower known as “Yebbi.”
(2) Shin Jung-woo (played by Go Kyung-pyo)
- Shin Jung-woo is Hanmin Securities’ new CEO and Geum-bo’s ex-boyfriend.
- Jung-woo believes numbers never lie, and he works like a machine from early morning to midnight.
- He also plays hardball, and he treats pressure and threats as tools if the deal demands it.
- When Jung-woo meets “Jang-mi,” he senses something familiar. Jung-woo’s suspicion pulls the romance tension back into the investigation, and Jung-woo keeps facing choices that test his morality.
(3) Go Bok-hee (played by Ha Yoon-kyung)
- Go Bok-hee is the CEO’s dedicated secretary and the “boss” of Dorm Room 301.
- Bok-hee survives corporate politics with style, charm, and sharp instincts, and she dreams of escaping to L.A. with a million dollars.
- Bok-hee looks like a pure opportunist at first, but Bok-hee also carries real scars from a broken home and an abusive brother.
- When Jang-mi fights to protect her, Bok-hee starts to waver _ then Bok-hee starts to doubt Jang-mi.
(4) Albert Oh (played by Jo Han-gyeol)
- Albert Oh leads Hanmin Securities’ Crisis Management Division.
- Albert is also the chaebol family’s “grandson card,” which means the succession storyline keeps pulling him forward even when he tries to avoid it.
- Albert acts carefree and watches movies at work, but his uncle’s suspicious death forces him into the spotlight.
- Jang-mi’s chaos triggers something in him, and Albert begins to step onto the power chessboard.
3. Seoul Single Women Workers’ Dorm, Room 301
This part of the Undercover Miss Hong K-Drama Cast matters because the dorm does more than provide laughs. Room 301 gives the story warmth, but Room 301 also becomes a pressure cooker where secrets slip out.
(1) Kang Nora (played by Choi Ji-soo)
- Kang Nora is a chaebol heiress, but Nora is also awkward and unprepared for real life.
- After a childhood kidnapping and years hidden in the U.S. with her mother, Nora returns in 1997 after Myung-hwi’s death.
- Nora enters Hanmin Securities under the alias “Kang Eun-joo.”
- The chairman promises Nora shares if she becomes a regular employee, so Nora moves into Room 301 and clings to Jang-mi when pressure hits.
(2) Kim Mi-sook (played by Kang Chae-young)
- Kim Mi-sook works at a branch counter, and Mi-sook is the dorm’s steady, gentle heart.
- Mi-sook hates conflict, Mi-sook is deeply religious, and Mi-sook remembers faces and names incredibly well.
(3) Kim Bom (played by Kim Se-a)
- Kim Bom is Mi-sook’s daughter.
- Bom secretly lives in the dorm and turns Room 301 into her tiny world while the women work.
- Bom’s presence eventually comes out, and Bom’s wish stays simple: Bom wants to stay with her mom.
(4) Kim Nam-joo (played by Jung Yi-rang)
- Kim Nam-joo is the dorm supervisor.
- Nam-joo is not a harsh tyrant, but Nam-joo takes rules and safety seriously, and Nam-joo believes the dorm supports women’s independence.
4. Hanmin Securities Crisis Management Division
The Crisis Management Division looks like the company’s “back room,” but the division smells like hidden deals and cleaned-up scandals. This division is where small clues can become explosive evidence.
(1) Bang Jin-mok (played by Kim Do-hyun)
- Bang Jin-mok is a longtime manager who looks like he has given up, but the company cannot replace him. Jin-mok used to be a top fund manager, and now he cleans up corporate messes when scandals explode.
(2) Lee Yong-gi (played by Jang Do-ha)
- Lee Yong-gi is a nerdy engineering PhD who helped build early cyber-banking projects.
- Yong-gi genuinely cares about the division, respects Jin-mok, stays friendly with Albert, and develops a crush on “Miss Hong.”
5. Hanmin Securities Key Power Players
This Undercover Miss Hong K-Drama Cast section is the “office war” core. These characters control information, control promotions, and control who gets blamed when the numbers go wrong.
(1) So Kyung-dong (played by Seo Hyun-chul)
- So Kyung-dong is a legendary trader inside Yeouido’s finance world.
- Kyung-dong serves the chairman’s interests and holds influence far beyond his title.
(2) Cha Joong-il (played by Lim Chul-soo)
- Cha Joong-il flatters up and crushes down.
- Joong-il cares about promotions and performance, and Joong-il used to be close friends with Myung-hwi.
- After Myung-hwi dies, Joong-il immediately looks for a new survival line instead of grieving.
(3) Oh Deok-gyu (played by Kim Hyung-mook)
- Oh Deok-gyu is a power broker with government-level networks.
Deok-gyu believes he built Hanmin Securities, and Deok-gyu tries to secure succession through his son Albert – even when Albert refuses to cooperate.
(4) Song Joo-ran (played by Park Mi-hyun)
- Song Joo-ran rose from an entry-level role to become the chairman’s most trusted aide.
- Joo-ran also leads an internal women’s group, and Joo-ran wants to block Deok-gyu’s takeover.
- Joo-ran sees Nora as a “controllable card” in the succession battle.
6. Hanmin Securities Owner Family
This line carries the story’s money and fear. The owner family treats the company like a kingdom, and every relationship here comes with strings attached.
(1) Kang Pil-beom (played by Lee Deok-hwa)
- Kang Pil-beom built the company from nothing into a national-level powerhouse.
- Even in old age, Pil-beom stays obsessed with control and distrust.
- Myung-hwi’s death forces Pil-beom to redesign succession during the 1997 financial crisis era, when bailout money and overseas fund sales become life-or-death choices.
(2) Choi In-ja (played by Byun Jung-soo)
- Choi In-ja is a former beauty queen and actress who married young and left her career behind.
- After Nora’s kidnapping, In-ja fights Pil-beom in court and lives in the U.S. through multiple remarriages and scandals.
- In-ja believes Nora needs the “right husband,” and In-ja targets Jung-woo as a potential son-in-law.
(3) Kang Myung-hwi (played by Choi Won-young)
- Kang Myung-hwi looked like the perfect heir. Myung-hwi wanted a different life, but Pil-beom controlled his path through work, marriage, and leadership.
- Myung-hwi finally decides to expose corruption _ then Myung-hwi dies in a traffic accident right before he can act.
- His death becomes the show’s biggest trigger.
7. Financial Supervisory Service (Regulators)
The regulators keep the story grounded as an investigation instead of a pure chaebol soap opera. The regulators push forward, and the company pushes back.
(1) Yoon Jae-beom (played by Kim Won-hae)
- Yoon Jae-beom is Geum-bo’s senior.
- Jae-beom acts like a nagging boss, but Jae-beom also understands Geum-bo and secretly pushes the mission forward without full HQ support.
(2) Nam Dong-gi (played by Han Soo-ho)
- Nam Dong-gi resents Geum-bo’s talent and tries to bring her down.
- Dong-gi also leaks confidential information to Hanmin’s executive side, which turns him into a dangerous internal mole.
8. Hong Geum-bo’s Family
This family line keeps Geum-bo human. The family line adds daily-life texture that makes the undercover risk feel real.
(1) Kim Soon-jung (played by Lee Soo-mi)
- Kim Soon-jung runs a fried chicken shop in Incheon.
- Soon-jung treats Geum-bo’s marriage as her life’s biggest mission.
(2) Hong Choon-seop (played by Kim Young-woong)
- Hong Choon-seop lived through poverty, but Choon-seop believes his daughters are his real wealth.
- Choon-seop openly brags about Geum-bo.
(3) Hong Jang-mi (played by Yuna)
- Hong Jang-mi is Geum-bo’s younger sister, and Jang-mi has a hip, street-smart vibe.
- Jang-mi helps with the makeover and lends her identity for the undercover operation.
9. Other Characters
(1) Bong Dal-soo (played by Kim Roe-ha)
- Bong Dal-soo is a former gangster who now runs a small auto shop.
- Dal-soo works for Song Joo-ran because Joo-ran is a hometown “big sister” figure.
10. Character Relationship Map
The Undercover Miss Hong character relationship chart becomes easy when you focus on three “collision points,” because each point keeps forcing characters to pick a side.
① Geum-bo (as Jang-mi) vs. the company’s defenses
Geum-bo searches for a ledger, and the company hides the ledger behind layers of office politics.
② Room 301 as emotional shelter—and future battlefield
The dorm roommates build trust, and the same trust becomes a weakness when the undercover truth threatens to surface.
③ Succession war inside Hanmin Securities
Pil-beom, Deok-gyu, Joo-ran, Nora, and Albert all pull the power rope, and each move changes who can protect whom.
※ If you draw the Undercover Miss Hong character relationship chart as arrows, you can label the arrows with one word: “control.” Each major player either controls money, controls information, or controls access to the chairman.
11. Historical Background (1997 Setting)
- Set one year before the IMF bailout (IMF rescue package), the story unfolds amid the build-up to the Asian Financial Crisis.
- In late-1990s Korea, aggressive expansion by chaebol groups, easy credit, and fast-moving hot money created a market where insider trading, stock manipulation, and backroom lobbying could feel “tolerated” in the Yeouido finance scene.
- With regulatory blind spots and weak internal controls, hidden ledgers, whistleblowers, and “clean-up teams” became realistic tools in corporate survival—making every secret a potential trigger for collapse.
12. Plot Summary
- This Undercover Miss Hong K-Drama Cast story begins in 1997, when Geum-bo detects suspicious financial patterns linked to Hanmin Securities.
- Geum-bo goes undercover as a young entry-level worker to retrieve proof that can survive legal and political pressure.
- Geum-bo enters a world where the Crisis Management Division cleans evidence, where Trading and Research trade favors, and where the executive office treats employees like pieces on a board.
- Then Jung-woo arrives as the new CEO, and Jung-woo’s personal history with Geum-bo turns the mission into a constant emotional trap.
13. Viewing Guide (So You Don’t Get Lost)
① Sort characters into five boxes before Episode 1: Dorm 301 / Crisis Management / Core Executives / Owner Family / Regulators.
② Follow “who holds the information,” not the finance terms: The story uses finance as atmosphere, and the story uses secrets as the real fuel.
③ Treat Dorm 301 scenes as part of the main plot: The friendships matter, and the friendships affect decisions later.
④ Use a quick note system: A simple list plus the Undercover Miss Hong character relationship chart idea will keep your brain calm during heavy office-politics episodes.
※ Read Next: To My Beloved Thief – Cast & Episodes (2026)
14. Conclusion
This Undercover Miss Hong K-Drama Cast guide works best if you remember one rule: the drama is not about who is “nice,” and the drama is about who chooses power versus truth when pressure hits. The dorm line gives your heart a place to rest, the company line gives you conflict, and the regulators give you momentum.
If you want maximum immersion, you can revisit the Undercover Miss Hong character relationship chart after every two episodes. That small habit makes betrayals easier to spot, and that habit makes the romance tension feel sharper too.
