The upcoming tvN drama “100 Days of Lies” just released its first teaser, giving viewers a glimpse into a world filled with espionage, hidden identities, and dangerous romance. The teaser, released on July 2, exactly 100 days before the show’s premiere, offers a brief but powerful look at the historical spy romance set in 1932 Gyeongseong, the former name of Seoul during the Japanese colonial period.
The drama brings together a star-studded cast led by Kim You-jung and GOT7 member Park Jin-young, who recently starred in “Our Unwritten Seoul.” The first teaser is already generating buzz for its intense atmosphere and the strong chemistry between the lead actors.
What the Teaser Shows
The teaser opens with fog-covered streets, intense confrontations, and the bustling backdrop of Gyeongseong Station and the Japanese Government-General of Korea. The production team worked to recreate the 1930s Gyeongseong look, with Korean civilians and Japanese police officers moving through the same spaces.
The teaser shows Lee Ga Gyeong (Kim You-jung) moving carefully through the Government-General building. Park Jin-young’s character, Kim Tae Woong, also known as Sato Hideo, appears with a mysterious and guarded expression. The short video suggests their paths are about to cross in ways that will put both of them in danger.
The teaser also introduces other key players. Jin Sun Kyu appears as Sato Shinichi, the second-highest official in the Japanese Government-General and Tae Woong’s adoptive father. Lee Moo Saeng plays Yoo Philip, an American news agency correspondent with a hidden agenda. Kim Hyun Joo takes on the role of Yoo So Ran, a sniper for the independence movement, shown aiming her rifle at an unknown target.
The Story Behind the Spy Romance
“100 Days of Lies” is a period spy romance set during the Japanese occupation of Korea. The series is directed by Yoo In Shik, known for his work on popular dramas like “Extraordinary Attorney Woo” and the “Dr. Romantic” series. The script comes from writer Ryu Bo Ri, who wrote the emotional drama “Do You Like Brahms?”
“This drama tells the dangerous love story between Gyeongseong’s top pickpocket, who becomes an undercover spy for the independence movement, and the adopted son of the Inspector-General of Korea.”
The story follows Lee Ga Gyeong, Gyeongseong’s best pickpocket. Her main goal is to save enough money to leave for the United States and start a new life. Her plans change when she gets a dangerous offer she cannot refuse. A sniper from the anti-Japanese resistance group Gugukdan recruits her for a mission to assassinate Sato Shinichi. She must infiltrate the Japanese Government-General of Korea as an interpreter trainee for 100 days.
Ga Gyeong’s mission becomes more complicated when she meets Kim Tae Woong, the newly appointed elite interpreter for the Government-General. Tae Woong is the adopted son of Sato Shinichi and speaks Korean, Japanese, and English fluently. The two characters become entangled in a situation where their loyalties, secrets, and growing feelings for each other put them at great risk.
Character Details and Cast
Kim You-jung as Lee Ga Gyeong
Kim You-jung plays Lee Ga Gyeong, a talented pickpocket and con artist who can lie and deceive with ease. Ga Gyeong dreams of escaping Joseon and starting a new life abroad. Her life takes an unexpected turn when she accepts a life-or-death offer to become a spy for the independence movement.
Park Jin-young as Kim Tae Woong / Sato Hideo
Park Jin-young, a member of the popular K-pop group GOT7, plays Kim Tae Woong. He is the adopted son of Sato Shinichi and has returned to Korea after many years abroad. Tae Woong is an elite interpreter who is fluent in English, Japanese, and Korean. He works for the Japanese Government-General during a time when Japan needed propaganda to justify its colonization of Korea.
Kim Hyun-joo as Yoo So Ran
Kim Hyun-joo plays Yoo So Ran, a sniper for the Gugukdan independence movement. She seeks revenge against Sato Shinichi and has a complicated past with him. So Ran returns to Korea after a decade away. She pretends to be a Chinese woman married to Yoo Philip to hide her true identity. It is So Ran who recruits Lee Ga Gyeong for the assassination mission.
Lee Moo-saeng as Yoo Philip
Lee Moo-saeng plays Yoo Philip, a Korean-American journalist working as a correspondent for a U.S. news agency in Gyeongseong. While he appears to be a neutral reporter, he is actually a member of the Gugukdan independence movement. He uses his position as a journalist to influence the Inspector-General of Korea.
Jin Sun-kyu as Sato Shinichi
Jin Sun-kyu plays Sato Shinichi, the main antagonist of the drama. He is the newly appointed Inspector-General of Korea and the second-highest official in the Japanese Government-General. He is an ambitious and cunning man who will do anything for power. He is the primary target of the Gugukdan independence movement.
A Director Known for Popular Dramas
Director Yoo In Shik is known for his work on some of the most popular K-dramas of recent years. His work on “Extraordinary Attorney Woo” earned praise for its warm, character-driven storytelling. He also directed the “Dr. Romantic” series, which blends medical drama with romance. “100 Days of Lies” represents a new direction for him, as he takes on the spy romance genre for the first time. The drama is the first collaboration between Yoo and writer Ryu Bo Ri.
Release Date and Streaming Information
“100 Days of Lies” is scheduled to premiere on tvN in October 2026. The drama will air in tvN’s prime-time Saturday-Sunday slot.
The series will consist of 16 episodes. It will be available for streaming on Netflix for international viewers. This makes the drama easily accessible to a global audience, continuing Netflix’s strategy of offering popular K-dramas to its subscribers.
The first teaser was released on July 2, 2026, exactly 100 days before the premiere on October 10, 2026. This marketing strategy helps build excitement for the show. The exact premiere date is October 10, 2026.
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A Story of Multiple Lies
The title “100 Days of Lies” refers to the 100 days Lee Ga Gyeong spends undercover as an interpreter. However, the drama suggests that the lies go much deeper than just one person’s cover story. Each character in the drama appears to be hiding something.
Sato Shinichi is hiding his true plans for Korea. Yoo So Ran is hiding her identity and her plan for revenge. Yoo Philip is hiding his true allegiance behind his job as a journalist. And Kim Tae Woong, the adopted son of the Inspector-General, is hiding his own secrets. The teaser suggests that the connection between Ga Gyeong and Tae Woong is not just a romance, but a relationship built on lies and hidden agendas.
The drama combines the themes of the Korean independence movement, espionage, and romance. It promises to deliver tension and suspense as the characters navigate a dangerous world where no one is exactly who they seem to be.
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