A Confirmed Pairing for a Character-Driven Medical Rom-Com
On April 16, KBS2 officially confirmed that Kim Sung Cheol will star alongside Jin Ki Joo in the upcoming romantic comedy Sleeping Doctor. The drama is set in a struggling private psychiatric clinic and follows two contrasting doctors whose professional disagreements gradually evolve into emotional connection.
At the center of the story is Hong Gyeong (Jin Ki Joo), a self-employed clinic director attempting to rebuild both her career and personal stability. Opposite her is Nam Ji Oh (Kim Sung Cheol), a versatile “pay doctor” known for his broad medical knowledge and practical approach to treatment.

Kim Sung Cheol as Nam Ji Oh: A Pragmatic Healer
In Sleeping Doctor, Kim Sung Cheol takes on the role of Nam Ji Oh, a character defined by adaptability and technical competence. Unlike traditional specialists, he is portrayed as a “jack-of-all-trades” doctor capable of handling a wide range of medical situations. His primary goal within the narrative is to revive the struggling Healer Mental Health Clinic.
However, Nam Ji Oh is not simply a functional character. His dynamic with Hong Gyeong introduces the central tension of the drama. The two differ significantly in their perspectives on treatment and clinic management, creating ongoing friction. Yet, as their interactions deepen, disagreement gives way to understanding, and eventually, emotional attachment.
This progression—from opposition to empathy—forms a key emotional arc, requiring a balance between restraint and gradual openness in performance.
Expanding a Versatile Acting Profile
Kim Sung Cheol has steadily built a reputation for versatility across genres. His performances in Our Beloved Summer, Do You Like Brahms?, Hellbound 2, and Boyfriend on Demand have demonstrated his ability to navigate both grounded realism and heightened narrative worlds.
With Nam Ji Oh, he steps into a role that combines professional authority with emotional complexity. The character’s outward competence contrasts with an evolving inner landscape, offering space for layered interpretation rather than overt dramatics.
The production team has expressed confidence in this casting, noting that Kim Sung Cheol aligns closely with the character and highlighting anticipation for how he will portray Nam Ji Oh’s nuanced emotional shifts.
A Dual Character Structure at the Core
The pairing of Hong Gyeong and Nam Ji Oh reflects a deliberate narrative structure built on contrast. Hong Gyeong, as previously confirmed, is a psychiatrist struggling with her own unresolved trauma—capable of treating others, yet unable to fully resolve her personal condition. Nam Ji Oh, in contrast, operates with efficiency and external problem-solving skills.
This duality—between emotional vulnerability and functional competence—positions the drama within a character-driven framework. Rather than focusing solely on medical cases, Sleeping Doctor emphasizes interpersonal dynamics and psychological depth.
Anticipation Builds Around On-Screen Chemistry
With both leads now confirmed, attention is turning toward their potential on-screen synergy. Jin Ki Joo’s strength in portraying internal emotional states, combined with Kim Sung Cheol’s controlled and adaptable acting style, suggests a pairing rooted in subtle interaction rather than exaggerated romance.
Their characters’ evolving relationship—shaped by disagreement, understanding, and gradual emotional alignment—will likely serve as the narrative’s central anchor.
Conclusion: A Promising Collaboration in a Hybrid Genre
Sleeping Doctor continues to position itself as a hybrid between romantic comedy and psychological drama. By focusing on flawed professionals navigating both personal and clinical challenges, the series aims to explore themes of healing beyond conventional medical narratives.
The confirmed collaboration between Jin Ki Joo and Kim Sung Cheol strengthens the project’s foundation, bringing together two actors known for controlled, character-oriented performances. As production moves forward, the drama stands out as a project that prioritizes emotional nuance within a familiar genre framework—offering both accessibility and depth.