Kim You Jung and Park Jinyoung Lead tvN’s 100 Days of Deception in First Teaser

tvN has opened the countdown for 100 Days of Deception with a first teaser that places Kim You Jung and Park Jinyoung at the center of a dangerous period spy romance. The network released the preview exactly 100 days before the drama’s scheduled premiere, giving viewers an early look at a story built around secrecy, colonial-era tension, and an encounter that appears likely to change both lead characters’ paths.

The upcoming weekend series is set during the Japanese occupation of Korea and follows Lee Ga Gyeong, described as one of Gyeongseong’s most skilled pickpockets. Kim You Jung plays Ga Gyeong as she moves from the city’s streets into a far riskier arena: the Japanese Government-General of Korea, where she goes undercover as an interpreter trainee. The premise immediately frames her not only as a survivor but as someone capable of reading rooms, identities, and danger with unusual precision.

Park Jinyoung stars opposite her as Kim Tae Woong, who also uses the Japanese name Sato Hideo. His character is introduced as a newly appointed interpreter at the Government-General and the adopted son of Sato Shinichi, the Inspector-General of Korea. That position places him close to colonial authority, but the teaser suggests that his meeting with Ga Gyeong will complicate whatever loyalties, obligations, or personal calculations he has carried into the role.

A spy romance built around Gyeongseong in 1932

The teaser’s biggest draw is its recreation of Gyeongseong in 1932, including crowded public spaces and official corridors where Koreans and Japanese police officers cross paths. Rather than leaning only on romance, the preview uses the historical setting to create pressure around every interaction. Gyeongseong Station and the Government-General appear as places where ordinary movement can quickly become surveillance, pursuit, or exposure.

That atmosphere matters because Ga Gyeong’s disguise is not a simple costume change. Entering the Government-General as an interpreter trainee means stepping directly into the machinery of power she is trying to navigate. Her pickpocketing background gives the character an agile, street-smart edge, but the teaser positions the mission as something larger and more dangerous than theft. For viewers, the question is how long she can perform this new identity before the people around her begin to notice inconsistencies.

The production also arrives with notable creative credentials. Director Yoo In Shik, known for Extraordinary Attorney Woo and the Dr. Romantic series, is helming the drama. His involvement will likely raise expectations for a series that has to balance character-driven emotion with suspense, historical texture, and ensemble storytelling. The first teaser indicates that the show is aiming for a polished, cinematic tone rather than a straightforward romance setup.

An ensemble with competing motives

Beyond the two leads, 100 Days of Deception is introducing a supporting cast whose roles expand the political and emotional stakes. Kim Hyun Joo plays Yoo So Ran, a sniper connected to the anti-Japanese resistance group Gugukdan. Lee Moo Saeng appears as Yoo Philip, a Gyeongseong correspondent for an American news agency, while Jin Sun Kyu plays Sato Shinichi, the high-ranking official whose authority links directly to Tae Woong’s identity and position.

The teaser hints that these characters are not simply background figures orbiting the romance. Sato Shinichi and Yoo Philip are shown moving with their own agendas, while Yoo So Ran’s appearance with a rifle points toward a resistance thread that could intersect with Ga Gyeong’s mission in unpredictable ways. Those details suggest a drama shaped by hidden motives, shifting alliances, and personal risks that go well beyond whether the central pair will trust each other.

For Kim You Jung, the project offers another high-profile lead role built around a character with sharp instincts and heavy emotional stakes. For Park Jinyoung, Tae Woong’s dual identity as Kim Tae Woong and Sato Hideo gives the role built-in tension: he is positioned between names, systems, and possibly conflicting loyalties. Their first on-screen encounter in the teaser is being framed less as a meet-cute than as a collision between two people trained, by circumstance, to keep something concealed.

The title itself points to a limited window of deception, which fits the marketing decision to release the teaser 100 days before premiere. It gives the drama a clear countdown and underlines the idea that the characters are racing against exposure. With a premiere date set for October 10, tvN now has several months to reveal how the series will blend romance, espionage, resistance activity, and the visual world of 1930s Gyeongseong.

While the first teaser does not lay out the full plot, it gives enough to establish the show’s central promise: a historical drama where romance is inseparable from danger. The appeal will likely come from watching how Ga Gyeong’s undercover mission, Tae Woong’s official role, and the supporting characters’ secret objectives collide inside a city where every public space seems to carry political weight.