A Bona Fide Killer Explores Kong Hyo Jin and Jung Jun Won’s Past Romance

MBC’s “A Bona Fide Killer,” an action drama adapted from the successful webtoon franchise, prepares viewers for an emotionally charged episode that dives into the unresolved romantic history between Kong Hyo Jin’s Yu Bo Na and Jung Jun Won’s Kwon Tae Sung. The series establishes its core premise around Yu Bo Na, a woman living a double life: by day she works as an ordinary manager of Sales Team 3 at Durumi Electronics, but by night she operates as “Kingfisher,” a legendary sniper struggling to maintain equilibrium between her dangerous profession and her responsibilities as a working mother.

A Romance Suspended Across Time

First Contact and Sacrifice

The foundation of Yu Bo Na and Kwon Tae Sung’s connection extends back years before the main narrative. During one of Yu Bo Na’s covert operations, she made a fateful decision that would bind them together: when she discovered Kwon Tae Sung unconscious and bleeding, she chose to save his life instead of completing her assignment. This moment of mercy, choosing another person’s survival over a professional objective, revealed the humanity beneath her “Kingfisher” persona. The pair’s emotional thread did not break despite their separation; it only grew more complicated.

The Hospital Rooftop Encounter

Their paths collided again in a moment of acute danger when Kwon Tae Sung found Yu Bo Na standing on the edge of a hospital rooftop. The specifics of why she occupied such a precarious position remain unclear, but the encounter forces both to confront the reality that their connection has never truly severed. Years of separation and silence have not erased their bond—they now face each other across a chasm of unspoken emotions and unresolved feelings.

Reunion on a Snowy Mountain

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Retreat and Support

The upcoming episode shifts the narrative to a snowy mountain location, where isolation becomes both setting and symbol. Yu Bo Na has withdrawn to a secluded mountain lodge as an escape from the mounting pressures of her bifurcated existence. The constant surveillance, the perpetual vigilance required by her sniper role, and the emotional labor of maintaining her corporate facade have accumulated into profound burnout. Kwon Tae Sung, demonstrating both knowledge of her emotional state and devotion to her wellbeing, has positioned himself within reach of the lodge. He remains available—not intrusive, but present—as she works through her exhaustion.

Intimate Moments and Renewal

Promotional stills reveal both characters sharing quiet moments surrounded by snow and mountain silence. The images capture extended eye contact between them, a visual language suggesting emotional reconnection and romantic possibility. These peaceful scenes form the prelude to the episode’s central crisis, creating a tragic contrast between the tenderness of their reunion and the chaos that follows.

Hunting, Disappearance, and Crisis

Skills Displayed in Nature

While residing at the mountain lodge, Yu Bo Na ventures outdoors with a practical purpose: securing food supplies through hunting. This sequence provides an opportunity to witness her legendary marksmanship unfiltered by the corporate workplace. She demonstrates the precision that earned her the “Kingfisher” title—executing each kill with the economy and accuracy that defines her reputation: one shot, one kill.

The Search and Collapse

The narrative takes an abrupt turn when Yu Bo Na disappears into the mountain terrain, carrying her hunting rifle with her. Kwon Tae Sung’s response is immediate: he begins searching the expansive mountain landscape for any sign of her. However, before he can locate her, his physical condition fails him. Kwon Tae Sung collapses somewhere on the mountain, leaving his location unknown and creating an immediate existential threat both to his safety and to their reunion.

Lee Dong Jin’s Hidden Pain

The Police Officer’s Origins

Woven into the mountain narrative is the long-awaited revelation of Lee Dong Jin’s (Lee Sang Yi) backstory. The episode finally exposes the specific trauma that motivated his career in law enforcement, answering a question that has remained unaddressed throughout the series.

Breaking Silence

The revelation unfolds during an emotionally resonant scene: Lee Dong Jin conducting memorial rites for his deceased parents while Kwon Tae Sung stands in solidarity beside him. Within this sacred, grief-laden environment, Lee Dong Jin permits himself to finally articulate the profound pain he has suppressed. He breaks his silence about the circumstances that transformed him into a police officer, releasing emotional weight carried in silence for years.

Broadcast Schedule

“A Bona Fide Killer” airs on August 22 at 9:50 p.m. KST on MBC. Viewers can access all previously broadcast episodes through Viki.