Kim You Jung Stars in tvN’s “100 Days of Deception” October 10 Premiere

tvN unveiled its historical spy romance “100 Days Of Deception,” announcing the complete cast and production details through its first script reading. The announcement included photographs and a video from the session, confirming an October 10 premiere date.

Scheduled to premiere on October 10 at 9:10 p.m. KST on tvN, the drama spans exactly 100 days during the Japanese occupation of Korea. At its center stands Lee Ga Gyeong, Gyeongseong’s (present-day Seoul) most skilled pickpocket, who assumes the identity of an interpreter trainee to penetrate the Japanese Government-General of Korea. Her objective: gather intelligence for Gugukdan, an underground anti-Japanese resistance movement. Within the occupation bureaucracy, she encounters Kim Tae Woong, who operates under the Japanese name Sato Hideo as the newly installed interpreter and the adopted son of the Inspector-General of Korea—the administration’s second-highest authority.

The Creative Team Behind “100 Days of Deception”

Director Yoo In Shik

Director Yoo In Shik brings a background spanning the medical courtroom series “Dr. Romantic” franchise and the character-driven legal drama “Extraordinary Attorney Woo.” For “100 Days of Deception,” he transitions into historical espionage, a thematic expansion that stretches his portfolio across medical, legal, and political drama.

Writer Ryu Bo Ri

Writer Ryu Bo Ri crafts the narrative around a deceptively simple premise—infiltration—that unfolds into moral complexity as characters navigate Korea during colonial occupation. The drama positions itself not as romance overlaying history, but as history containing romance: two people drawn together across lines of allegiance, each concealing secrets that threaten the other.

The Lead Characters

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Lee Ga Gyeong (Kim You Jung): From Thief to Spy

Kim You Jung anchors the narrative as Lee Ga Gyeong, a woman whose skill as a pickpocket translates imperfectly into the higher-stakes world of espionage. The character begins with concrete ambitions—aspiration to emigrate to America, confidence in her criminal abilities—but the drama tracks her transformation as crises force her to choose between self-preservation and the independence movement’s demands.

Her arc requires You Jung to embody competing emotional registers: the swagger of someone who has never failed at her craft, the disorientation of infiltrating a world whose rules she must master on the fly, and the moral erosion that comes from sustained deception. Production materials emphasize her portrayal of this “wide range of emotions” as the role’s central challenge.

Sato Hideo (Park Jinyoung): The Divided Man

Park Jinyoung plays Sato Hideo (Kim Tae Woong’s official Japanese identity), a character structured around profound internal contradiction. Fluent in three languages, he functions as the occupation administration’s polished face—educated, articulate, seemingly the ideal interpreter. Beneath this surface operates a man carrying “deep sorrow that he cannot share with anyone,” according to production materials.

This duality creates the drama’s central tension: two infiltrators—Lee Ga Gyeong pretending to be an interpreter, Sato Hideo pretending to be a loyal administrator—meeting at a point where neither can fully trust the other’s true allegiance. His linguistic fluency, while making him invaluable to the Japanese bureaucracy, also positions him as someone caught between two worlds, unable to speak truthfully in any language.

The Resistance Network and Occupation Administration

Gugukdan’s Operatives

The anti-Japanese resistance movement Gugukdan operates through a network of characters that gives the drama’s supporting cast thematic weight. Kim Hyun Joo plays Yoo So Ran, Gugukdan’s sniper pursuing vengeance against specific targets within the occupation hierarchy. Her decision to approach Lee Ga Gyeong with a “life-or-death deal” becomes the catalyst that pulls the pickpocket into the resistance.

Lee Moo Saeng portrays Yoo Philip, who uses his credentials as a correspondent for an American news agency to apply public pressure against the Inspector-General while secretly serving Gugukdan. His character maintains a marriage of convenience—a false relationship that conceals his actual feelings for Yoo So Ran.

The broader resistance membership constitutes a collective protagonist: Choi Duk Moon as Kwak Woon Hak, Kim In Kwon as Han Cheol Ryong, Jeon Seok Chan as Kim Chi Geon, Jeon Yung Beob as Song Jeon, Kim Dong Young as Park Se Hwan, Lee Do Goon as Jang Jung Yeop, Park Jung Yeon as Kim Myung Nam, Lee Sun as Lee Young Bok, and Ko Se Bin as Hwang Gyu Young. Together, these actors constitute Gugukdan not as a handful of heroes, but as a network spanning different classes and trades—reflecting how anti-colonial resistance required organizational structure rather than individual heroics.

The Japanese Occupation Hierarchy

Jin Sun Kyu inhabits Sato Shinichi, the Inspector-General and Gugukdan’s assassination target. Described as ambitious and willing to sacrifice anything to advance his career, Sato Shinichi represents the occupation’s upper echelon. His “cold gaze and stern manner of speaking” project the intimidating presence necessary for maintaining colonial control. His assassination becomes Gugukdan’s opening move, shaping the 100-day operational timeline.

Below him operate supporting officials: Kim Do Hyun as Suzuki, an English interpreter within the Government-General; Go Han Min as Mitarai, an administrative bureaucrat; and Kim Joong Hee as Fukuda, head of the Security Bureau. Sato Hideo’s household includes Seo Jeong Yeon as Ryu Gwan Sil, his Korean housekeeper—a position that historically gave resistance networks useful domestic access—and Kouri Yuka as Yamada, his secretary.

Lee Ki Young plays Kim Seung Eok, head of Korea’s largest textile company, representing the civilian economic power that sustained the colonial system. Hong Sa Bin rounds out the cast as Inoma, Lee Ga Gyeong’s pickpocketing partner, maintaining her connection to the criminal world she is leaving behind.

The Script Reading and Production Ceremony

The first script reading convened the complete cast with director Yoo In Shik and writer Ryu Bo Ri. The session opened with a moment of silence dedicated to Korean independence activists, establishing the ceremony’s historical consciousness from the outset.

The production team offered this statement: “It was a meaningful time to reflect on the significance and message of the drama from our very first meeting. We hope the sincerity of everyone involved, both the cast and crew, reaches viewers in its entirety. We are bringing you the story of ordinary people who never lost sight of the light of hope that is independence during the dark era of Japanese colonial rule.”

Premiere Details

“100 Days of Deception” will premiere on tvN on October 10 at 9:10 p.m. KST. The script reading materials distributed following the session—photographs and video—mark the first official production content released to the public, signaling the show’s entry into active production.