Love in Disguise Korean Drama 2026 Wiki: Cast, Story, Episodes, Characters & More
Love in Disguise is an upcoming South Korean office romantic comedy and mystery thriller starring Yim Si-wan, Seol In-ah, Kim Jung-hyun, and Yeonwoo.
The Korean title of the drama is 나의 유죄인간, which is also translated as My Guilty Man. The series combines romance, comedy, mystery, investigation, undercover work, and a gender-disguise storyline.
At the center of the story is Yoon Yi-jun, the third-generation heir of the powerful Taegang Group. Although he appears to have everything—wealth, status, intelligence, and looks—his perfectionist personality makes him extremely difficult to work for.
His life changes dramatically when a murder takes place at Taegang Group and Yi-jun becomes a prime suspect.
Meanwhile, Kang Jae-hee, a former special forces officer and police detective, receives an undercover assignment connected to the case. She disguises herself as a man and becomes Yi-jun’s personal secretary so she can investigate him from close range.
Yi-jun believes his new secretary is a man.
Jae-hee knows exactly who she is.
And neither of them expects their dangerous investigation to slowly turn into something much more complicated.
The drama is directed by Park Dan-hee and written by Mun Soo-jung. It is based on the popular web novel and webtoon Why Don’t You Know She’s a Woman? by Lee Ah-hyun and Ryu Do-ha.
Love in Disguise Quick Details
| Information | Details |
|---|---|
| Drama Title | Love in Disguise |
| Korean Title | 나의 유죄인간 |
| Literal Title | My Guilty Man |
| Original Story | Why Don’t You Know She’s a Woman? |
| Country | South Korea |
| Language | Korean |
| Genre | Romance, Romantic Comedy, Mystery, Thriller, Investigation |
| Network | tvN |
| International Platform | Prime Video |
| Premiere Date | October 19, 2026 |
| Episodes | 12 |
| Broadcast | Monday & Tuesday |
| Main Cast | Yim Si-wan, Seol In-ah, Kim Jung-hyun, Yeonwoo |
| Director | Park Dan-hee |
| Writer | Mun Soo-jung |
| Original Authors | Lee Ah-hyun, Ryu Do-ha |
| Production | CJ ENM Studios, PitaPat Studio |
The drama premieres on October 19, 2026, at 8:50 PM KST on tvN. Current listings give the series a 12-episode run, with the finale scheduled for November 24.
Love in Disguise Release Date
Love in Disguise premieres on October 19, 2026.
The drama will air on tvN on Monday and Tuesday evenings.
The international release is associated with Prime Video, while the Korean broadcast is handled by tvN.
The planned 12-episode schedule is:
- Episode 1 — October 19, 2026
- Episode 2 — October 20, 2026
- Episode 3 — October 26, 2026
- Episode 4 — October 27, 2026
- Episode 5 — November 2, 2026
- Episode 6 — November 3, 2026
- Episode 7 — November 9, 2026
- Episode 8 — November 10, 2026
- Episode 9 — November 16, 2026
- Episode 10 — November 17, 2026
- Episode 11 — November 23, 2026
- Episode 12 — November 24, 2026
This schedule is currently listed by multiple drama databases, although individual episode titles and detailed plots may be updated closer to broadcast.
What Is Love in Disguise About?
Love in Disguise follows a wealthy heir who becomes involved in a murder investigation and the female detective who secretly enters his life to find the truth.
Yoon Yi-jun is the next heir to Taegang Group, one of the most powerful conglomerates in the drama’s world.
He has been raised in a privileged environment and appears almost perfect from the outside.
However, Yi-jun is extremely sensitive and demanding. His perfectionist personality makes working for him difficult, and many employees struggle to remain around him.
His carefully controlled life changes when a murder occurs at Taegang Group.
Yi-jun becomes a prime suspect.
Instead of openly confronting the investigation, he stays inside his home and hires a new personal secretary.
That secretary is Kang Jae-hee.
But Jae-hee is not an ordinary secretary.
She is a former special forces officer who later became a police detective. She has exceptional combat skills and receives an undercover mission connected to Yi-jun.
To investigate him without revealing her identity, she disguises herself as a man.
Yi-jun therefore believes that his new secretary is male.
This creates the central comedy and tension of the story.
Jae-hee must investigate Yi-jun while pretending to be his loyal secretary.
At the same time, she has to protect him from possible danger.
The longer she stays beside him, the more difficult it becomes to separate her professional mission from her personal feelings.
Yoon Yi-jun – Yim Si-wan
Yim Si-wan plays Yoon Yi-jun, the male lead.
Yi-jun is the third-generation heir of Taegang Group.
He has almost everything that someone from a powerful chaebol family could want. He is wealthy, attractive, highly educated, and expected to eventually take an important position within the family business.
However, his personality is far from easygoing.
Yi-jun is extremely sensitive and has perfectionist tendencies. He notices small mistakes and expects people around him to meet his standards.
This makes him difficult to work with.
His employees often struggle to understand him because his outwardly polished appearance hides a much more complicated personality.
The murder case changes his life.
Once he becomes a suspect, Yi-jun’s normally controlled world begins falling apart.
His new secretary becomes one of the few people constantly around him.
He does not know that the person he trusts to protect and assist him is actually investigating him.
Kang Jae-hee – Seol In-ah
Seol In-ah plays Kang Jae-hee, the female lead.
Jae-hee is a former special forces officer who later becomes a police detective.
Unlike Yi-jun, she is physically tough, disciplined, and highly trained.
She has experience with martial arts and combat, and promotional material describes her as an exceptionally capable investigator.
When Yi-jun becomes a murder suspect, Jae-hee is given an undercover assignment.
She disguises herself as a man and becomes his personal secretary.
Her disguise allows her to get extremely close to Yi-jun without immediately revealing that she is investigating him.
However, maintaining the disguise becomes increasingly difficult as Yi-jun begins depending on her.
Jae-hee also has to deal with Yi-jun’s difficult personality.
He expects his secretary to prioritize him above everything else, while Jae-hee has her own mission and does not want to become emotionally involved.
Kim Si-hyun – Kim Jung-hyun
Kim Jung-hyun plays Kim Si-hyun, a lawyer on Taegang Group’s legal team.
Si-hyun is one of Yi-jun’s closest people.
The two have known each other since high school and have been friends for many years.
He understands Taegang Group better than most people and is frequently involved in handling difficult situations for the company.
Si-hyun is calm, intelligent, and good at reading situations.
He also has a mysterious side because he does not openly reveal everything he thinks.
His relationship with Yi-jun makes him an important character in the murder investigation.
Because he knows Yi-jun extremely well, he may also notice things that other people overlook.
Kim Jung-hyun’s character adds another layer to the story because he is not simply a supporting lawyer. He is closely connected to Yi-jun’s personal and professional life.
Lee Hye-jung – Yeonwoo
Yeonwoo plays Lee Hye-jung, the secretary of Taegang Group’s chairman.
Hye-jung is highly professional and has established a strong reputation within the company.
She is meticulous and understands how to maintain the correct distance between a secretary and a powerful executive.
Her philosophy is essentially that a good secretary should function like the boss’s shadow.
During working hours, she maintains a professional image and carefully controls her behavior.
But outside the workplace, another side of her personality begins to appear.
This contrast makes Hye-jung one of the more mysterious characters in the series.
Recent promotional material has specifically highlighted the difference between her professional workplace personality and her freer life after work.
Supporting Cast
The drama has a larger supporting ensemble connected to Taegang Group, the police investigation, Yi-jun’s family, and Jae-hee’s family.
Reported supporting cast members include:
- Kim In-kwon as Park Bong-yi
- Kim Ki-bang as Jung Wan-gu
- Nam Hae-jun as Kim Suk-jin
- Ahn Sang-woo as Ma Hee-do
- Hong Eun-hee as Yoon Mi-jin
- Park Ah-in as Yoon Na-jung
- Choi Jin-ho as Yoon Tae-sik
- Jo Seung-yeon as Na Man-suk
- Jeong Han-seol as Jung Da-woon
- Kim Do-yoon as Park Min-hwan
- Jung Yoo-min as Han Eun-young
The supporting characters represent several different sides of the story, including the company, police investigation, chaebol family, and Jae-hee’s personal world.
The Murder Case
The murder case is the main mystery that brings Yi-jun and Jae-hee together.
A murder takes place at Taegang Group, and Yi-jun becomes the prime suspect.
The case creates immediate questions.
Why did the murder happen?
Why is Yi-jun being suspected?
What does he know about the victim?
And is someone deliberately trying to frame him?
Jae-hee’s undercover mission is designed to uncover the truth.
Instead of investigating Yi-jun from a distance, she moves directly into his daily life.
That gives her access to information she would otherwise never obtain.
Jae-hee’s Male Disguise
The gender-disguise element is one of the defining features of Love in Disguise.
Jae-hee disguises herself as a man and becomes Yi-jun’s personal secretary.
Yi-jun believes his secretary is male.
This creates several comedic situations because Jae-hee must constantly maintain the disguise while dealing with her unpredictable boss.
The drama’s promotional material has already highlighted the unusual relationship between the two characters, with Yi-jun becoming increasingly comfortable around the secretary without knowing the truth about Jae-hee’s identity.
The Relationship Between Yi-jun and Jae-hee
At the beginning, Yi-jun and Jae-hee have a very unusual relationship.
He is the suspect.
She is the detective.
Then they become employer and secretary.
But Jae-hee is secretly investigating him.
This means almost every conversation between them has two meanings.
Yi-jun sees Jae-hee as his secretary.
Jae-hee sees Yi-jun as a person she needs to investigate.
The situation becomes even more complicated when they begin developing feelings for each other.
Jae-hee cannot simply reveal the truth because it could destroy her investigation.
Yi-jun does not know that the person he is becoming attached to has been hiding a major secret.
Romance and Mystery Together
The drama does not treat the murder investigation and romance as completely separate stories.
They are connected.
The closer Jae-hee gets to Yi-jun, the more information she can discover.
But the closer she gets emotionally, the harder it becomes to remain objective.
This creates the main emotional conflict of the drama.
Jae-hee must determine whether Yi-jun is truly dangerous or whether there is something else behind the murder case.
At the same time, Yi-jun gradually begins seeing his secretary as someone he can trust.
Office Romance Element
Although the murder mystery is important, Love in Disguise also has a strong workplace-comedy setup.
Yi-jun is a demanding executive.
Jae-hee is an undercover secretary.
Their daily interactions provide plenty of opportunities for humor.
He expects perfect service.
She has to pretend to be a calm and obedient male secretary while secretly being a highly trained detective.
The contrast between Jae-hee’s real personality and her undercover role is one of the show’s major sources of comedy.
Taegang Group
Taegang Group is the powerful conglomerate at the center of the story.
Yi-jun is one of its leading heirs.
The company is also connected to the murder case, which means corporate politics and family relationships become important to the investigation.
Different characters within the company have their own interests, relationships, and secrets.
This creates a larger mystery beyond Yi-jun himself.
Kim Si-hyun’s Role in the Mystery
Kim Si-hyun is especially important because he knows Yi-jun extremely well.
As his longtime friend and Taegang Group lawyer, Si-hyun has access to information about the company and Yi-jun’s personal life.
He is also someone who tends to remain calm under pressure.
Because he rarely reveals his true feelings, viewers may have to pay attention to his actions rather than simply his words.
His relationship with Yi-jun also gives the story another emotional dimension.
Lee Hye-jung’s Hidden Side
Lee Hye-jung is another character who fits the drama’s theme of hidden identities.
At work, she is professional and disciplined.
Outside work, she behaves very differently.
That contrast reflects one of the larger ideas behind the drama: people often hide parts of themselves depending on who is watching.
Jae-hee takes that idea to an extreme by literally changing her identity.
But other characters may also be hiding things.
Original Web Novel and Webtoon
Love in Disguise is based on the popular Korean story Why Don’t You Know She’s a Woman?.
The original work was written by Lee Ah-hyun and Ryu Do-ha.
The story was published as a web novel and later adapted into a webtoon.
The original premise follows special-forces-trained police officer Kang Jae-hee, who receives a secret mission involving wealthy heir Yoon Yi-jun, a murder suspect.
The webtoon is associated with Kakao’s platform, and the original story combines romance, comedy, investigation, and undercover elements.
Director of Love in Disguise
Park Dan-hee is directing Love in Disguise.
The director is responsible for bringing together the drama’s romantic-comedy elements with its mystery and investigation storyline.
Because the series moves between workplace comedy, romance, undercover situations, and murder investigation, the direction needs to maintain a balance between lighter scenes and suspenseful moments.
Writer of Love in Disguise
Mun Soo-jung is credited as the drama’s screenwriter.
The screenplay adapts the original story by Lee Ah-hyun and Ryu Do-ha for television.
The adaptation keeps the central concept of a highly trained female investigator disguising herself as a male secretary while investigating a wealthy murder suspect.
Love in Disguise Episode Guide
The first season is planned for 12 episodes.
Because the drama has not premiered yet, detailed episode summaries beyond the officially revealed premise should not be treated as confirmed spoilers.
Episode 1
Release Date: October 19, 2026
The story introduces Taegang heir Yoon Yi-jun and the murder case that turns his life upside down. Kang Jae-hee receives her undercover assignment and enters Yi-jun’s world disguised as a male secretary.
Episode 2
Release Date: October 20, 2026
Jae-hee begins adjusting to her new role while keeping her investigation hidden from Yi-jun.
Episode 3
Release Date: October 26, 2026
The unusual employer-secretary relationship develops as Jae-hee continues watching Yi-jun closely.
Episode 4
Release Date: October 27, 2026
The investigation and personal relationship begin becoming increasingly complicated.
Episode 5
Release Date: November 2, 2026
Jae-hee’s undercover mission continues as the mystery surrounding Yi-jun develops.
Episode 6
Release Date: November 3, 2026
The relationship between Yi-jun and his secretary faces new complications.
Episode 7
Release Date: November 9, 2026
The investigation moves deeper into the secrets surrounding Taegang Group.
Episode 8
Release Date: November 10, 2026
Jae-hee must balance her feelings with her responsibility to uncover the truth.
Episode 9
Release Date: November 16, 2026
The central mystery moves closer to its later stages.
Episode 10
Release Date: November 17, 2026
Yi-jun and Jae-hee’s relationship continues to evolve while questions surrounding the murder remain.
Episode 11
Release Date: November 23, 2026
The major conflicts approach their conclusion as the investigation reaches an important stage.
Episode 12
Release Date: November 24, 2026
The final episode is expected to resolve the central murder mystery and the complicated relationship between Yi-jun and Jae-hee.
Note: These episode summaries are intentionally spoiler-safe because detailed official episode synopses have not yet been released for every episode.
Main Themes of Love in Disguise
Hidden Identity
Jae-hee’s entire investigation depends on keeping her real identity secret.
But the series also suggests that other characters may have sides they do not show publicly.
Trust
Yi-jun believes his secretary is someone he can depend on.
The irony is that Jae-hee is secretly investigating him.
Their relationship therefore constantly raises the question of whether genuine trust can develop from a relationship built on deception.
Love and Suspicion
The central romance is unusual because it develops between a suspect and the investigator watching him.
Their feelings create a conflict between professional responsibility and personal emotion.
Workplace Relationships
The drama uses the secretary-and-executive relationship for comedy while also exploring how professional boundaries can change when two people spend nearly every day together.
Family and Power
Yi-jun’s position within Taegang Group means his personal life is connected to corporate politics and family expectations.
Why the Title Love in Disguise Fits the Story
The title Love in Disguise reflects both the undercover concept and the romance.
Jae-hee is literally living under a disguise.
She is pretending to be someone she is not.
At the same time, her growing feelings for Yi-jun create another kind of disguise because she cannot openly admit what she feels.
Yi-jun also does not immediately understand the person standing beside him.
The story therefore uses disguise not only as a detective device but also as a metaphor for hidden emotions.
Is Love in Disguise a Romance Drama?
Yes.
The series is primarily a romance thriller with romantic-comedy elements, but it also includes mystery, investigation, and undercover action.
The central relationship between Yoon Yi-jun and Kang Jae-hee develops while Jae-hee investigates him as a murder suspect.
Is Love in Disguise Based on a Webtoon?
Yes.
The drama is based on the web novel and webtoon Why Don’t You Know She’s a Woman? by Lee Ah-hyun and Ryu Do-ha.
The original story combines romance, comedy, investigation, and the undercover female-detective concept.
Is Love in Disguise Based on a True Story?
No specific real-life case is identified as the basis of the drama.
It is a fictional adaptation of a Korean romance-investigation story.
The murder case and its characters are part of the fictional narrative.
Where to Watch Love in Disguise
In South Korea, Love in Disguise airs on tvN.
The series is also associated with Prime Video for international distribution.
The Korean premiere is scheduled for October 19, 2026.
Love in Disguise Ending
The drama has not aired yet, so the official ending is not known.
The final episode is scheduled for November 24, 2026, according to the current 12-episode schedule.
The biggest questions surrounding the ending will be whether Yi-jun is cleared of the murder suspicion, who is actually responsible for the crime, whether Jae-hee’s undercover identity is exposed, and what happens to the relationship between the two leads.
Any detailed ending currently circulating before the drama airs should be treated as speculation.
Will Love in Disguise Have Season 2?
There is currently no confirmed announcement for a second season.
The drama is planned as a 12-episode first season.
A second season would depend on an official renewal announcement after the first season.
Love in Disguise FAQs
What is Love in Disguise about?
It is a romance mystery drama about a wealthy chaebol heir who becomes a murder suspect and a former special forces officer who disguises herself as his male secretary to investigate him.
Who plays Yoon Yi-jun?
Yim Si-wan plays Yoon Yi-jun.
Who plays Kang Jae-hee?
Seol In-ah plays Kang Jae-hee.
Who plays Kim Si-hyun?
Kim Jung-hyun plays Kim Si-hyun, Yi-jun’s longtime friend and Taegang Group lawyer.
Who plays Lee Hye-jung?
Yeonwoo plays Lee Hye-jung, the chairman’s secretary at Taegang Group.
When does Love in Disguise premiere?
The drama premieres on October 19, 2026.
How many episodes does Love in Disguise have?
The drama is planned for 12 episodes.
What is the Korean title of Love in Disguise?
The Korean title is 나의 유죄인간.
What is the original title of the source material?
The drama is based on Why Don’t You Know She’s a Woman?, written by Lee Ah-hyun and Ryu Do-ha.
Is Kang Jae-hee actually a man?
No. Kang Jae-hee is a woman who disguises herself as a man for her undercover investigation.
Why does Jae-hee become Yi-jun’s secretary?
She takes the undercover position so she can investigate Yi-jun, who has become a prime suspect in a murder case.
Is Yoon Yi-jun actually guilty?
The answer is one of the central mysteries of the drama and should be discovered through the series rather than assumed before the premiere.
Is Love in Disguise a comedy?
Yes. Alongside its murder mystery and romance, the series includes office-romance and comedy elements, particularly because Yi-jun believes his female undercover investigator is a male secretary.
Final Thoughts
Love in Disguise combines several familiar K-drama ingredients into an unusual setup.
There is a wealthy chaebol heir, a mysterious murder, an undercover police officer, a secret identity, workplace comedy, and a romance that develops under complicated circumstances.
The biggest attraction of the story is the relationship between Yoon Yi-jun and Kang Jae-hee.
Yi-jun thinks he has hired a male secretary.
Jae-hee knows she is actually investigating him.
She enters his home and professional life with one goal—to uncover the truth behind the murder case.
But the longer she stays close to Yi-jun, the more difficult it becomes to keep emotions completely separate from the investigation.
The drama also has an interesting supporting cast. Kim Si-hyun, played by Kim Jung-hyun, provides a connection to Yi-jun’s past and the Taegang Group legal team, while Lee Hye-jung, played by Yeonwoo, adds another mysterious figure inside the company.
With Yim Si-wan and Seol In-ah leading the series, Love in Disguise has a storyline that can move between romantic comedy and suspense without relying on only one genre.
The 12-episode drama premieres on October 19, 2026, making it one of the notable new Korean dramas arriving in the October 2026 lineup.