tvN has unveiled the first teaser for its upcoming weekend drama 100 Days of Lies on July 2, 2026, offering viewers their first look at the historical espionage series. It is an upcoming South Korean romantic action thriller set during the Japanese colonial era. The drama stars Kim You-jung and GOT7’s Jinyoung (Park Jin-young) in the lead roles along with Kim Hyun-joo, Lee Moo-saeng, and Jin Seon-kyu.
Released exactly 100 days before its premiere, the preview introduced the central characters, their hidden identities and the world they inhabit. Set in 1932 Gyeongseong during the Japanese occupation, the teaser recreates the era with detailed visuals of Gyeongseong Station, Japanese police and the Government-General building. The short preview establishes a tense atmosphere while setting the atmosphere of a story of secret missions, political conflict as well as romance.
Throughout the teaser, brief moments build suspense and highlights the central themes of espionage, survival, sacrifice, and romance. It first introduces Kim You-jung playing Lee Ga-gyeong looking at the Government-General building.
She is the city’s most skilled pickpocket, who has secret mission and moves cautiously through enemy territory. She is seen crossing paths with Kim Tae-woong, played by Jinyoung. Their encounter hints at an unpredictable relationship that develops amid growing danger.
The teaser also introduces the other key figures like Yoo So-ran played by Kim Hyun-joo, Lee Moo-saeng’s Yoo Philip and Jin Seon-kyu playing Sato Shinichi. The closing moments show Kim You-jung’s Lee Ga-gyeong staring at someone with tears in her eyes as a gun is aimed at her, leaving viewers questioning the circumstances behind the emotional confrontation.
Soon after 100 Days of Lies’s teaser was released, it generated discussion across social media. Fans took to social media to share their excitement over the drama’s production quality, historical setting, and specifically cast lineup. They expressed anticipation for the series’ premiere. One fan wrote,
“THE ACTORS ARE ACTORINGGGG OH WE’RE GETTING A BANGER OF A DRAMA.”
Viewers continued praising 100 Days of Lies‘s teaser’s visuals and the performances shown in the brief preview, saying they were looking forward to seeing Kim You-jung and Jinyoung back on the screen.
Many viewers also praised the star-studded cast, saying the lineup has raised their expectations for the series. Some also praised tvN’s decision to release the preview exactly 100 days before the premiere, calling it a creative promotional move. Several fans said the teaser alone had heightened their anticipation for the drama’s debut.
100 Days of Lies: Plot, cast, premiere date, and everything to know about Kim You-jung and GOT7’s Jinyoung’s historical spy romance
100 Days of Lies (100일의 거짓말) set in Gyeongseong in 1932, follows Lee Ga-gyeong, the city’s most talented pickpocket and con artist. Hoping to earn enough money to leave Joseon and begin a new life overseas, she accepts an offer from the independence movement to infiltrate the Japanese Government-General of Joseon.
Disguised as an interpreter, she agrees to serve as a “fake spy” for 100 days. However, as her mission progresses, she becomes deeply involved in the resistance and starts passing valuable intelligence to the independence army. The situation forces her to choose between personal survival and a greater cause.
While carrying out her dangerous assignment, Ga-gyeong meets Kim Tae-woong, also known as Sato Hideo, an elite interpreter who works inside the Government-General. Fluent in Korean, Japanese and English, he returns to Joseon after spending more than a decade abroad. He is entrusted with an important role within the colonial administration.
As the adopted son of Inspector-General Sato Shinichi, Tae-woong finds himself caught between his responsibilities and the growing secrets surrounding Ga-gyeong. Their relationship gradually develops into a romance as hidden identities, conflicting loyalties, and espionage place both of them in increasing danger.
Kim You-jung as Lee Ga-gyeong and GOT7’s Jinyoung as Kim Tae-woong lead the series. The supporting cast includes Kim Hyun-joo as Yoo So-ran, a sniper in the anti-Japanese resistance determined to avenge her past.
Lee Moo-saeng plays Phillip Yoo, a Gyeongseong correspondent for an American news agency who supports Korea’s independence movement. Jin Seon-kyu plays Sato Shinichi, the ambitious Inspector-General of Korea and Tae-woong’s adoptive father, whose pursuit of power makes him one of the resistance’s primary targets.
Blending romance, espionage, action, and historical drama, 100 Days of Lies follows characters navigating deception, political conflict, and personal sacrifice during one of Korea’s most turbulent periods. Against the backdrop of the independence movement, the series explores how secret missions, hidden identities, and growing emotions reshape the lives of those fighting on opposite sides of the colonial divide.
100 Days of Lies also becomes another collaboration between director Yoo In-shik, known for Dr. Romantic, Extraordinary Attorney Woo, and The Wonderfools, and writer Ryu Bo-ri, who previously penned Do You Like Brahms?. 100 Days of Lies will consist of 16 episodes and is set to debut on tvN on October 10, 2026.
The season is expected to conclude on November 29, 2026, with each episode running for around 70 minutes. 100 Days of Lies will follow a Saturday-Sunday broadcast schedule, with episodes also streaming on Netflix after their television airing.
Edited by Adrija Chakraborty
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