#1
Agent Kim Reactivated 김부장
23.1%
SBS aired the 10-episode action series from June 26 to July 25, 2026, and Netflix streamed it worldwide. It is based on the Naver Webtoon Manager Kim by Jeong Jong-taek and Toy, a spin-off centred on the character Manager Kim from the webtoon Lookism. So Ji-sub (소지섭) plays Mr. Kim, a retired covert agent living quietly as a bank employee and single father until his daughter is kidnapped.1
Its eighth episode, on July 18, drew 23.1% nationwide. The series opened at 9.5% and reached 21.6% with its fourth episode on July 4, which the article describes as the fastest any SBS Friday–Saturday drama has passed 20%.1
#2
Taxi Driver 모범택시
21.0%
Based on the webtoon The Deluxe Taxi by Carlos and Lee Jae-jin, the SBS series follows Rainbow Taxi, a secret company that takes revenge on criminals the law has failed to punish. Lee Je-hoon (이제훈) plays the driver, Kim Do-gi. Its three seasons aired in 2021, in 2023 and from November 2025 to January 10, 2026.2
Season 2 holds the peak: its finale on April 15, 2023 drew 21.0% nationwide. Season 1's best was 16.0% and season 3's was 14.2%.2
#3
My Lawyer, Mr. Jo 동네변호사 조들호
17.3%
KBS2's 20-episode legal drama ran from March 28 to May 31, 2016, based on the webtoon Neighborhood Lawyer Jo Deul-ho by Hatzling (Kim Yang-soo). Park Shin-yang (박신양) plays Jo Deul-ho, a star prosecutor who loses everything after reporting corruption and starts again in a run-down neighbourhood law office.3
The final episode on May 31 drew 17.3% nationwide, as measured by AGB Nielsen. A second season, My Lawyer, Mr. Jo 2: Crime and Punishment, began on KBS2 in January 2019.3
#4
Itaewon Class 이태원 클라쓰
16.548%
JTBC aired the 16-episode series from January 31 to March 21, 2020, and Netflix streams it worldwide. It is based on Gwang Jin's webtoon of the same name, and was the first series produced by the film distributor Showbox. Park Seo-joon (박서준) plays Park Sae-ro-yi, who opens a business called DanBam in Itaewon after prison and sets out to take revenge on the Jangga Group.4
The finale on March 21 drew 16.548% nationwide, the highest peak here for a cable channel rather than a terrestrial network. The series won Best Drama Series at the 25th Asian Television Awards.4
#5
Jeongnyeon: The Star Is Born 정년이
16.458%
Based on the Naver Webtoon Jeong Nyeon by Seo Ireh and Namon, tvN's 12-episode drama follows a girl with a gift for singing who joins a gukgeuk troupe, a form of Korean musical theatre, in the 1950s, just after the Korean War. Kim Tae-ri (김태리) plays Yoon Jeong-nyeon. It aired from October 12 to November 17, 2024.5
The finale on November 17 drew 16.458% nationwide, 0.09 points behind Itaewon Class. Studio N, a subsidiary of Naver Webtoon, produced the series.5
#6
Again My Life 어게인 마이 라이프
12.0%
SBS aired the 16-episode series from April 8 to May 28, 2022. It is based on a KakaoPage web novel by Lee Hae-nal, which was also released as a webtoon. Lee Joon-gi (이준기) plays Kim Hee-woo, a young prosecutor who is killed while trying to take down a powerful politician and is given a second chance at life.6
Its 15th episode on May 27 drew 12.0% nationwide. Lee Hae-nal is also credited with the source of MBC's The Judge Returns, which peaked at 13.6% in February 2026 but is not ranked here, because the article used doesn't mention a webtoon edition.625
#7
Marry My Husband 내 남편과 결혼해줘
11.951%
tvN aired the 16-episode revenge drama from January 1 to February 20, 2024. It is based on Sung So-jak's web novel of the same name, which was also serialised as a webtoon. Park Min-young (박민영) plays Kang Ji-won, who is killed by her husband in 2023 and wakes up in 2013 with a chance to change her fate.7
The finale on February 20 drew 11.951% nationwide. Its 11th episode scored higher in the Seoul area alone (13.036%), but only 11.776% nationwide.7
#8
Business Proposal 사내맞선
11.6%
HaeHwa first published the story as a KakaoPage web novel in 2017–18, and illustrator Narak turned it into a webtoon in 2018. SBS aired the 12-episode romantic comedy from February 28 to April 5, 2022. Ahn Hyo-seop (안효섭) and Kim Se-jeong (김세정) play a company CEO and the employee who goes on a blind date with him in her friend's place.8
Its 10th episode on March 29 drew 11.6% nationwide, slightly above the 11.4% finale. On Netflix it spent three weeks at No. 1 on the weekly chart of non-English TV shows, the first Korean series produced and first released by a local company to top it.8
#9
The Uncanny Counter 경이로운 소문
10.999%
Based on Jang Yi's Kakao Webtoon Amazing Rumor, the series follows So Mun, a high-school student who joins the Counters, a team that hunts evil spirits escaping from the afterlife. Jo Byeong-kyu (조병규) plays So Mun, and Kim Se-jeong of Business Proposal (#8) co-stars.9
Season 1 aired on OCN from November 28, 2020 to January 24, 2021, and its finale drew 10.999%, making it OCN's highest-rated series. Season 2 moved to tvN in 2023 and peaked at 6.065%.9
#10
A Girl Who Sees Smells 냄새를 보는 소녀
10.8%
Adapted from a webtoon by Seo Soo-kyung (pen name Man Chwi) on KT's KTOON platform, the 16-episode SBS drama aired from April 1 to May 21, 2015. Shin Se-kyung (신세경) plays Choi Eun-seol, who can see smells as patterns in the air.10
Its final episode on May 21 drew 10.8% nationwide, as measured by AGB Nielsen. Its working title was Sensory Couple before it went back to the webtoon's name.10
