tvN just quietly dropped one of the most exciting casting announcements of the year. On March 6, the network officially confirmed the full lead lineup for 100 Days of Lies — a period spy romance set during Japan’s colonial occupation of Korea. And with the director of Extraordinary Attorney Woo at the helm, this one already has all the ingredients of a must-watch hit.
100 Days of Lies — Everything We Know So Far
| Detail | Info |
|---|---|
| Drama Title | 100 Days of Lies (literal translation) |
| Network | tvN |
| Premiere | Second half of 2026 |
| Director | Yoo In Shik (Extraordinary Attorney Woo, Dr. Romantic series) |
| Setting | Gyeongseong (modern-day Seoul), Japanese colonial era |
| Genre | Period spy romance |
| Lead Actress | Kim You Jung as Lee Ga Kyung |
| Lead Actor | GOT7’s Park Jinyoung as Kim Tae Woong / Sato Hideo |
| Supporting Cast | Kim Hyun Joo, Lee Moo Saeng, Jin Sun Kyu |
| Streaming | Rakuten Viki (international) |
The Story: Danger, Deception & a 100-Day Undercover Mission
The drama centres on Lee Ga Kyung (Kim You Jung), Gyeongseong’s most skilled pickpocket who dreams of nothing more than earning enough money to start a new life in America. That dream gets derailed — and turbocharged — when she’s recruited for a covert 100-day mission: infiltrate the Japanese Government-General of Korea posing as an interpreter.
Standing directly in her path is Kim Tae Woong (Park Jinyoung), an elite, multilingual interpreter fluent in English, Japanese, and Korean. As the adopted son of the Inspector-General of Korea, he’s also operating under a Japanese alias — Sato Hideo. Two people living double lives, on opposite sides of the same dangerous world. The romantic tension writes itself.
👉 Also Read: Upcoming K-Drama Premieres & Cast Announcements in 2026 — TechnoSports
The Full Cast Breakdown
Kim Hyun Joo plays Yoo So Ran, a sharpshooter for the Korean independence movement who returns to Gyeongseong under a false Chinese identity after a decade away — on a mission to assassinate the Inspector-General. Her character approaches Lee Ga Kyung with a deadly, inescapable proposition.
Lee Moo Saeng stars as Yoo Philip, a Korean-American journalist doubling as an independence movement operative, cleverly leveraging his press credentials to influence the colonial administration.
Jin Sun Kyu takes on the role of Sato Shinichi — Tae Woong’s adoptive father and the newly appointed Inspector-General of Korea — a ruthless, power-obsessed man who becomes the primary target of the resistance.
Why This Drama Is Already Generating Serious Buzz
The combination of talent and creative pedigree here is genuinely rare. Director Yoo In Shik’s track record is impeccable — Extraordinary Attorney Woo became a global phenomenon in 2022, and the Dr. Romantic franchise has been one of tvN’s most consistently acclaimed series. Kim You Jung is coming off Dear X, while Park Jinyoung recently starred in the hit film Hi-Five. Both are at career highs heading into this project.
The colonial-era spy romance genre also has a proven track record in Korean drama — and a storyline built around active deception, double identities, and a ticking 100-day clock gives writers almost limitless dramatic potential.
👉 Also Read: Best Period K-Dramas to Watch in 2026 — TechnoSport
