When Touch Your Heart premiered on tvN in early 2019, it didn't try to reinvent the romantic comedy genre. Instead, it leaned entirely into the magnetic pull of its two lead actors, offering viewers a lighthearted escape. If you fell in love with the tragic romance of Grim Reaper and Sunny in Guardian: The Lonely and Great God, this series was built precisely to heal that heartbreak.
The story follows Oh Yoon-seo, a top actress whose career tanks after an undeserved scandal. To land a coveted role with a famous screenwriter, she takes a faux-job as a secretary for three months under Kwon Jung-rok, a cold and meticulous attorney. What starts as an awkward workplace arrangement turns into an office romance defined by earnest chemistry and low-stakes comfort.
Getting to know the ensemble behind these characters reveals why this series remains a fan-favorite comfort watch years later.
Meet the Main Leads
The heartbeat of the series rests entirely on the shoulders of its central duo, whose off-screen friendship translates into effortless on-screen warmth.
Lee Dong Wook as Kwon Jung-rok
Lee Dong Wook stars as Kwon Jung-rok, a workaholic, perfectionist attorney at Always Law Firm. Jung-rok initially treats Yoon-seo's arrival as an unwanted disruption, but his stoic exterior masks a deeply principled and surprisingly dorky romantic.
Lee brings a deadpan comedic timing to the role that contrasts sharply with his intense gaze. By the time Jung-rok is awkwardly googling how to date a celebrity or writing earnest, one-line confession letters, it's impossible not to root for him.
Yoo In Na as Oh Yoon-seo / Oh Jin-sim
Yoo In Na plays Oh Yoon-seo (born Oh Jin-sim), a bubbly, fashion-forward actress whose terrible acting skills match her big heart. Yoon-seo refuses to let public gossip break her spirit, maintaining an infectious optimism.
Yoo plays the role with total self-awareness. She makes Yoon-seo's bad acting genuinely funny while grounding her in genuine vulnerability. Her character's bright pink wardrobe and unabashed love for romance tropes set a joyful tone for the entire production.
The Supporting Law Firm Ensemble
A great workplace rom-com needs an eccentric supporting cast to keep the office lively, and Always Law Firm delivers a dynamic roster of secondary characters.
Oh Jung Se as Yeon Joon-kyu
Oh Jung Se plays Yeon Joon-kyu, the CEO of Always Law Firm and a passionate, unabashed fanboy of actress Oh Yoon-seo. Joon-kyu's chaotic excitement when Yoon-seo joins the firm drives much of the early comedy. Oh Jung Se brings his trademark expressive acting to the role, turning what could have been a standard boss archetype into a hilarious, lovable cheerleader for the main couple.
Son Sung Yoon as Yoo Yeo-reum and Lee Sang Woo as Kim Se-won
The legal drama extends into the prosecutor's office through prosecutor Kim Se-won (Lee Sang Woo) and his ex-girlfriend, prosecutor Yoo Yeo-reum (Son Sung Yoon). Their slow-burn, second-chance romance adds emotional weight to the series, balancing out the pure fluff of the main couple.
The Office Staff: Choi Yoon-hyuk and Dan Moon-hee
Played by Shim Hyung-tak and Park Kyung-hye, attorney Choi Yoon-hyuk and lawyer Dan Moon-hee provide some of the show's most comedic moments. Choi is a narcissistic mama's boy who undergoes a humbling transformation when he falls for Dan, a lawyer whose intense, dramatic daydreams about quick romance lead to endless comedic situations.
Behind the Scenes and Production Facts
Understanding how the series came together highlights why it captured such a dedicated global audience.
- Web Novel Origins: The drama is adapted from the web novel Jinsimi Dadda by Yegeo, which was serialized on KakaoPage between 2016 and 2017.
- The Goblin Reunion: Because Lee Dong Wook and Yoo In Na played star-crossed lovers Wang Yeo and Sunny in the historic fantasy hit Guardian: The Lonely and Great God, tvN capitalized heavily on fan demand for their official reunion.
- Director Connection: The series was directed by Park Joon-hwa, who also directed other prominent romantic comedies like What's Wrong with Secretary Kim, lending the show its signature bright, polished aesthetic.
Frequently Asked Questions
Are Lee Dong Wook and Yoo In Na a couple in real life?
No. While their chemistry on Touch Your Heart and Guardian led many fans to speculate, they are close friends and professional colleagues who respect each other's craft.
Where can I watch Touch Your Heart online?
The series is available to stream internationally on platforms like Rakuten Viki in select regions.
Does Touch Your Heart have a happy ending?
Yes. The series concludes with a definitive, low-conflict happy ending for both the main couple and the primary supporting characters.
How many episodes are in the series?
The show ran for 16 episodes on tvN from February 6 to March 28, 2019.
