Jin Ki-joo K-dramas: a complete guide to her best roles in romance, mystery and thriller

Long before she was dispensing vigilante justice in Teach You a Lesson, Jin Ki-joo was navigating a school mystery in Undercover High School, the MBC K-drama available for streaming on Viu and HBO Max. She plays Oh Su-a, a dedicated temporary history teacher striving for a permanent position at the prestigious Byeongmun High School.

When Jung Hae-seong (Seo Kang-joon), a National Intelligence Service (NIS) agent, goes undercover as a transfer student, Oh Su-a finds herself drawn to the mysterious newcomer, who reminds her of her childhood first love. After discovering his true identity and secret mission, she becomes an unlikely ally in his investigation into King Gojong’s missing gold bars—believed to be hidden somewhere on campus—and the corruption festering within the school’s walls.

Beyond the disarming chemistry between its two leads, which balances the narrative with plenty of warmth and rom-com levity, the Seo Kang-joon and Jin Ki-joo K-drama stands as one of her most entertaining outings, highlighting her sharp comedic timing and on-screen charisma.

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Like her Teach You a Lesson co-star Kim Mu-yeol, Jin Ki-joo’s next K-drama will see her don a white coat. The upcoming KBS2 rom-com series Sleeping Doctor marks Jin Ki-joo’s first foray into the world of medical K-dramas.

Here, she plays Hong Kyeong, an accomplished psychiatrist who keeps falling asleep in front of her patients. It doesn’t take long for her trauma-induced narcolepsy to jeopardise her newly opened private clinic, forcing her to partner with Nam Ji-oh (Kim Sung-cheol), a versatile freelance doctor, to help keep the practice afloat.

Ji-oh and Kyeong repeatedly clash over how the clinic should be run, but his arrival gives her the time and space she needs to confront the trauma at the root of her condition. As they continue to work together, what begins as professional friction quietly tips into an unexpected romance.

Jin Ki-joo has the honour of starring alongside celebrated film veteran Song Kang-ho (Parasite, Snowpiercer, Memories of Murder) in his first-ever K-drama—Disney+’s Uncle Samsik. Set against the backdrop of political upheaval in 1960s Korea, Jin Ki-joo plays Joo Yeo-jin, the daughter of an assemblyman and romantic partner of the idealistic and ambitious Kim San (Byun Yo-han).

As Kim San becomes increasingly entangled with the enigmatic Uncle Samsik, a calculating political powerbroker, his ideals are gradually tested by compromise and ambition. Amid this shifting landscape, Yeo-jin, who takes on a job as a journalist, stands in contrast to the two men, refusing to compromise her principles and serving as both emotional anchor and moral counterpoint.

In this Jin Ki-joo K-drama, the actress showcases a more mature and restrained performance, holding her own against Song Kang-ho and Byun Yo-han in a role the actress herself described as unlike anything she had played before. For audiences more accustomed to her lighter roles, it reveals a new layer of versatility that would pave the way for more complex performances to come.

In the Jin Ki-joo K-drama Come and Hug Me, she plays Han Jae-yi, a rising actress whose life is shaped by a violent incident from her childhood. In the MBC melodrama, Han Jae-yi reconnects with her first love Chae Do-jin (Jang Ki-yong), a detective whose father is the serial killer responsible for the death of Jae-yi’s parents.

As adults, the pair are forced to confront the lasting emotional and psychological impact of their shared past, with their relationship complicated by trauma and guilt. The K-drama blends romance with psychological tension, exploring how love can persist even in the shadow of inherited violence.

Jin Ki-joo shines in her first leading lady role, offering a sensitive and grounded portrayal of grief and PTSD. Meanwhile, her chemistry with co-star Jang Ki-yong adds quiet intensity to the series’ central romance.

In KBS2’s My Perfect Stranger, the Jin Ki-joo K-drama that seamlessly blends its crime thriller plot with time travel elements, the actress plays Baek Yoon-young, a publishing editor who finds herself stranded in 1987 alongside Yoon Hae-joon (Kim Dong-wook), a present-day news anchor trying to prevent a string of murders, including those of Yoon-young’s mother—and his own.

While Hae-joon focuses on the murder cases, Yoon-young uses the opportunity to prevent her mum from ending up with her deadbeat dad. Despite their separate agendas, their paths keep crossing, hinting that their fates are more closely intertwined than they realise. As Yoon-young digs deeper into her family’s past, she uncovers secrets that place those closest to her at the centre of Hae-joon’s investigation.

While audiences enjoyed Yoon-young and Hae-joon’s dynamic partnership, they were equally moved by the tender friendship that develops between Yoon-young and the younger versions of her parents. Her attempts to give her mother a better future—even at the risk of erasing her own existence—make for some of the series’ most poignant moments, with Jin Ki-joo bringing warmth and heart to every scene.

Jin Ki-joo stars as Go Seul-hae, an upstanding police officer, in the MBC K-drama From Now On, Showtime!. Seul-hae’s life changes when she meets Cha Cha-woong (Park Hae-jin), a famous magician who secretly relies on a team of ghosts to help him pull off his seemingly impossible stage illusions.

Although initially sceptical of Cha-woong’s supernatural abilities, Seul-hae soon drafts him and his ghostly companions to solve a series of criminal cases. As they investigate together, the pair uncover a connection that stretches far beyond the present day, revealing that their fates were intertwined centuries ago in a tragic past life.

As Go Seul-hae, Jin Ki-joo brings warmth and infectious optimism to the series, making her an ideal foil to Park Hae-jin’s arrogant, high-maintenance showman. Their charming chemistry, combined with the unique supernatural premise, makes From Now On, Showtime! a charming and inventive fantasy rom-com Jin Ki-joo K-drama.

In the SBS romantic comedy The Secret Life of My Secretary, Jin Ki-joo won over audiences as Jung Gal-hee, the hardworking secretary to Do Min-ik (Kim Young-kwang), a demanding executive at a mobile media company who relies heavily on her efficiency and loyalty. When Min-ik develops face blindness following an attack, their relationship takes an unexpected turn.

While audiences are initially led to believe that Gal-hee is the only person Min-ik can still recognise, it soon becomes clear that he remembers her signature red cardigan and secretary look rather than her face. When a blind date mix-up leaves him mistaking Gal-hee for another woman, he finds himself developing feelings for both his dependable secretary and her alter ego. As the deception spirals, Gal-hee struggles to reconcile the two versions of herself that Min-ik has fallen for, while he is left feeling betrayed.

Aside from showcasing her sparkling chemistry with her co-star Kim Young-kwang, the beloved Jin Ki-joo K-drama highlights the actress’ remarkable range as she balances Gal-hee’s sincere, dutiful nature with the comedic chaos of her high-society charade.

From romantic comedies and fantasy adventures to political thrillers and action-packed mysteries, Jin Ki-joo has proven her versatility time and again. Whether you’re discovering the actress through Teach You a Lesson or revisiting earlier favourites like Come and Hug Me and The Secret Life of My Secretary, these Jin Ki-joo K-dramas showcase the remarkable range and charisma that continue to make her such a compelling screen presence.

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