100 Days of Deception has crossed a line that few cable dramas reach. Episode 10 of the tvN spy romance pulled an average nationwide rating of 10.7% on November 8, 2026, more than double its 5.3% debut on October 10. The same week, Park Jinyoung rose to No. 1 on Good Data Corporation’s most buzzworthy actor list, with co-lead Kim You Jung at No. 2 and the drama itself holding No. 1 on the buzzworthy drama chart for the second straight week. The numbers tell one story. The scenes behind them tell another.
The Ratings Climb, Episode By Episode
The rise has been steady rather than sudden. Nielsen Korea data tracked by OSEN and Soompi shows the drama adding viewers almost every week.
- Episode 1 (October 10): 5.3% nationwide
- Episode 2 (October 11): 7.6%
- Episode 4 (October 18): 9.0%
- Episode 6 (October 25): 9.5% average, 10.4% peak
- Episode 8 (November 1): 9.8%
- Episode 10 (November 8): 10.7% average, 12.0% peak nationwide; 11.7% average and 13.1% peak in the capital region
Saturday episodes have been lower but still growing, moving from 6.5% in episode 5 to 7.2% in episode 7 and 7.4% in episode 9. The November 8 episode took first place in its time slot across all channels, including public broadcast networks, and also led the 20–49 age group that tvN targets. The 5.4 percentage point jump from episode 1 to episode 10 is the clearest signal that word of mouth is doing its job.
Park Jinyoung Takes No. 1 In Actor Buzz
Good Data Corporation’s FUNdex rankings for the fifth week of October (October 26–November 1), released on November 3, placed Park Jinyoung at No. 1 among drama actors with a 4.12% share. Kim You Jung followed at No. 2 with 4.10%, ending Kim Ji Won‘s three-week run at the top. Kim Ji Won of Doctor X dropped to No. 3 with 3.41%.
“For the second week in a row, ‘100 Days of Deception’ rose to No. 1 on Good Data Corporation’s weekly list of the dramas that generated the most buzz.” — Soompi, November 8, 2026
The drama itself held No. 1 on the buzzworthy drama list with a 9.36% share, ahead of Doctor X at 7.96%. MyDramaList noted that the show climbed from third place in its premiere week to second and then to first for the past two weeks. Soompi confirmed the same pattern on November 8, describing the drama as holding the top spot for the second consecutive week.
A Story Built On Secrets And Sacrifice
100 Days of Deception is set in 1932 Gyeongseong, during the Japanese occupation of Korea. Kim You Jung plays Lee Ga Kyung, a skilled pickpocket who dreams only of leaving Korea for America. A stolen suitcase belonging to resistance sniper Yoo So Ran, played by Kim Hyun Joo, pulls her into the independence movement. Ga Kyung agrees to go undercover as an interpreter at the Japanese Government-General of Korea for 100 days, posing as Geum Seo Hee.
Park Jinyoung plays Kim Tae Woong, also known as Sato Hideo, an elite interpreter who speaks Japanese, English, and Korean. Hideo is the adopted son of Sato Shinichi, played by Jin Sun Kyu, the Director-General of Political Affairs. Hideo’s Korean name and his Japanese upbringing sit at the center of the show’s tension. He is a man split between two identities, and Park Jinyoung has said he built the character from the outside in.
“Hideo is conflicted so often that playing it big would have felt heavy-handed, so I held back my emotions and tried not to show too much. He endured ten years of rigid discipline under his adoptive father, enough to leave him traumatized, so I kept his movements to a minimum and never let his composure slip. I built the character from his posture up.” — Park Jinyoung, in a press release shared by HanCinema
Kim Hyun Joo‘s Yoo So Ran is a resistance sniper who lost her daughter 13 years earlier. Lee Moo Saeng plays Yoo Philip, a Korean-American correspondent who enters a marriage of convenience with So Ran to help her carry out missions. Kam Woo Sung appears as Geum Seok Jung, a figure whose death in episode 6 pushes the story into darker territory.
Episode 10: The Night The Mask Started To Slip
The November 8 episode centered on a failed assassination attempt at a banquet marking the opening of the Japanese Government-General’s telegraph office. A time bomb hidden in a cake by Lee Ga Kyung was meant to kill Governor-General Sato Shinichi. News of an attack on the Japanese Prime Minister forced the banquet to be cancelled, and the Governor-General left the venue. Kim Tae Woong stood in front of the cake, unaware of the bomb. Ga Kyung pushed the trolley away with all her strength. The bomb exploded, and Tae Woong shielded her with his body.
Ga Kyung had already boarded a train to Busan, intending to catch a ship to the United States. She returned to Hee-won after sensing danger to Yoo So Ran during a security check. Police were searching for a woman who had lost a pearl earring near the scene. Ga Kyung borrowed a similar earring from a pawnshop and dropped it on the floor, pulling attention away from So Ran. The episode ended with Tae Woong confronting her.
“You’re a spy, aren’t you?” — Kim Tae Woong to Lee Ga Kyung, episode 10 closing scene
The confrontation is the moment the show has been building toward since episode 1. Ga Kyung‘s cover as Geum Seo Hee is no longer secure. Tae Woong has connected her actions to the explosion and to the missing earring. The Inspector General has also started looking into her past. The story has moved from a cat-and-mouse game to a direct question that neither lead can avoid.
Who Made The Show
100 Days of Deception is a 16-episode series written by Ryu Bo Ri and directed by Yoo In Shik, with Kim Yoon Jin co-directing. Yoo In Shik is known for Extraordinary Attorney Woo, and Ryu Bo Ri wrote Do You Like Brahms?. The drama is a special project for tvN’s 20th anniversary. Filming took eight months, according to Park Jinyoung, who described the shoot as intense and said he learned a great deal from the cast and crew.
Kim You Jung said the script made her feel it would be an honour just to be part of the project. She was drawn to Ga Kyung‘s age and uncertainty.
“She’s in her early twenties, still vulnerable and not yet sure what her dreams are, and I was curious to see how someone so young would come of age in such a turbulent era. I wanted to experience her growth and transformation alongside her.” — Kim You Jung, in the same HanCinema press release
Where To Watch And When The Finale Arrives
100 Days of Deception airs on tvN in South Korea every Saturday and Sunday at 9:10 p.m. KST. The series streams on Netflix in the United States, United Kingdom, Canada, Australia, India, and most global markets, and on TVING in Korea. Episodes arrive on Netflix shortly after their Korean broadcast.
The remaining schedule is:
- Episode 11: Saturday, November 14, 2026
- Episode 12: Sunday, November 15, 2026
- Episode 13: Saturday, November 21, 2026
- Episode 14: Sunday, November 22, 2026
- Episode 15: Saturday, November 28, 2026
- Episode 16 (finale): Sunday, November 29, 2026
For viewers in the US Eastern time zone, new episodes typically arrive on Netflix on Saturday and Sunday mornings. UK viewers get them on Saturday and Sunday afternoons. Indian viewers can expect episodes on Saturday and Sunday evenings. Australian viewers receive them on Sunday and Monday mornings, depending on daylight saving.
The Global Reach Behind The Korean Numbers
Domestic ratings are only part of the picture. 100 Days of Deception has held a place on Netflix’s Global Top 10 TV (Non-English) chart. What’s On Netflix recorded 13 million viewing hours and 2.8 million completed views in the show’s first week on the platform, covering the period from October 11 to October 18, 2026. The series charted in 47 countries at launch and has appeared in 130 countries since October 12. It peaked at No. 4 on Netflix Thailand and reached No. 3 on Netflix Indonesia in early November.
A HanCinema press release noted that the show’s Korean historical setting has not stopped it from finding audiences abroad. The combination of espionage, romance, and a clearly defined mission has travelled further than many period dramas manage.
What The Buzz Rankings Measure
Good Data Corporation compiles its FUNdex rankings from news articles, blog posts, online communities, videos, and social media reactions about dramas that are currently airing or about to air. The rankings are not a measure of raw viewership. They measure how much conversation a show generates across platforms. A drama can rate well and still rank low on buzz if viewers are not talking about it online. 100 Days of Deception is doing both.
The actor rankings work the same way. Park Jinyoung‘s No. 1 finish is not a measure of screen time or ratings. It reflects how often his name, his scenes, and his performance are being discussed. Kim You Jung‘s No. 2 finish puts both leads in the top two spots, a placement that few dramas achieve in the same week.
The Numbers That Matter Most
The 10.7% nationwide rating is the headline figure, but the 12.0% peak matters just as much. A peak rating shows how many viewers stayed through a single episode, not just how many tuned in at the start. The 13.1% peak in the capital region is the highest the show has reached in Seoul and the surrounding area. For a cable drama airing against public broadcast competition, first place in its time slot across all channels is a significant result.
The 20–49 age group win is equally important for tvN, which relies on advertising revenue tied to that demographic. The show is not just drawing older viewers who remember the historical period. It is drawing the audience that advertisers pay for.
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What Episode 11 Will Address
Episode 11, scheduled for Saturday, November 14, will pick up from Tae Woong‘s question. Ga Kyung has not answered. The Inspector General is investigating her past. So Ran and Philip are still operating under false identities. The Gugukdan has lost a member and failed an assassination attempt. The show has six episodes left to resolve the question of whether Ga Kyung can finish her 100 days without losing the person she was sent to deceive.
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