1. A Piece of Your Mind (2020)
A Piece of Your Mind (2020), starring Jung Hae In, Chae Soo Bin, Lee Ha Na, Kim Sung Kyu, is a heart-wrenching romance that has moved many viewers to tears.
Jung Hae In plays Ha Won, a talented programmer who has secretly loved his childhood friend for 10 years. Despite being abandoned twice, Ha Won's feelings for her never fade. Eventually, he meets Seo Woo, a woman who loves him deeply, despite knowing his heart is scarred by the past. Seo Woo enters Ha Won’s life unexpectedly, sensing his pain and the lingering love for someone he’s lost.
Jung Hae In is a truly dedicated actor in South Korea, constantly working on new projects, often jumping from one to the next as soon as a drama finishes airing. Even as A Piece of Your Mind was still airing, news broke that he was considering a new role in a project titled D.P. Dog Day.
IMDb Rating: 7.4

2. Tune in for Love (2019)
Tune in for Love (2019) follows the familiar theme of two characters who continuously meet and miss each other, but thanks to the director's smooth storytelling and the chemistry between the lead actors, the film feels fresh and unique, unlike any other story told before.
What makes Tune in for Love truly beautiful is how, after both characters have found stability in their lives, they finally come together in the most fulfilling way. Despite the years apart, they never stopped thinking about each other. Their love is the result of their personal growth and maturity. Their hearts have always been connected, never ready to let go.
This film is not a drama or a plot twist thriller. It leaves viewers with a sense of lightness and peace, making them reflect on their own past experiences of receiving affection from someone. Love is wonderful, but the initial spark of attraction is something unforgettable, magical, and fleeting. Jung Hae In and Kim Go Eun, both talented actors with an approachable charm and powerful emotional range, bring to life the characters of Hyun Woo and Mi Soo—gentle, warm-hearted, brave, and kind.
IMDb Rating: 7.1

3. Startup (2019)
Startup (2019) features top stars such as Ma Dong Seok, Yum Jung Ah, Jung Hae In, Park Jung Min, and director Choi Jeong Yeol, who has won the prestigious Blue Dragon Film Award.
The story follows two close friends, Teak II and Sang Pil, who set out to make money for entirely different reasons. The two dream of quitting college and becoming successful entrepreneurs, but they are unaware of the harsh realities that await them. Teak II decides to work at a small restaurant to escape his overbearing parents, while Sang Pil joins a financial company in hopes of making enough money to treat his grandmother’s illness. Jung Hae In brings a refreshing new energy to the role, portraying a young man struggling with financial hardship rather than the usual love-driven characters he’s known for.
This film combines light humor with social commentary on issues faced by youth, such as rebellion, the desire to express themselves, and the worries of parents. While it focuses more on entertainment than deep philosophical themes, the film keeps things light and enjoyable, making it perfect for a family movie night with friends and loved ones.
IMDb Rating: 6.4

4. One Spring Night (2019)
One Spring Night (2019), directed by Ahn Pan Seok, features Jung Hae In, Han Ji Min, and Kim Jun Han. It tells the poignant love story between Lee Jung In (Han Ji Min) and Yoo Ji Ho (Jung Hae In). In this drama, Jung Hae In once again stars opposite an older co-star, but his excellent performance makes the age difference irrelevant.
In One Spring Night, Jung Hae In plays a single father who faces disappointment from his ex-wife, whom he thought he could never win back. Then, Ji Ho meets Jung In, a woman in a long-term relationship whose feelings have slowly faded. The two are perfect for each other, but sadly, they meet at the wrong time. However, in the end, love conquers all, even if it seems selfish and irrational. Jung In breaks up with her boyfriend, Ji Ho opens his heart, and despite the challenges, they eventually find happiness together.
If Pretty Noona Who Buys Me Food is a romantic summer evening under yellow lights, One Spring Night is a soft, beautiful, and warm spring night.
IMDb Rating: 7.9

5. Something In The Rain (2018)
Something In The Rain (2018) is widely considered the breakout role that propelled Jung Hae In into stardom. His every glance and gesture in this role is so authentic that even now, viewers continue to praise the film for its portrayal of heartfelt emotion.
Unlike many fairy-tale romances, Something In The Rain paints a realistic picture of love, showing how the main couple’s relationship helps dissolve the age gap stigma often seen in real-life relationships between older women and younger men. The film’s standout feature is the character of Seo Joon Hee (played by Jung Hae In), the charming younger man who falls for his older sister’s friend. Jin Ah and Joon Hee have known each other since childhood, but their feelings for each other only emerge when Joon Hee returns from the U.S. to Korea.
Their love story isn’t without its challenges, from judgmental outsiders to different life goals. However, as if guided by fate, Joon Hee and Jin Ah eventually find a way to navigate their differences and build a future together.
IMDb Rating: 8.1

6. Prison Playbook (2017)
Prison Playbook (2017) may be set in a prison, but it masterfully mixes humor and light-hearted moments with thought-provoking life stories. From the endearing clumsiness of the lead character to the mischievous antics of a prisoner, the film delivers plenty of laughs. At the same time, it offers poignant reflections on life, subtly woven into its narrative.
What stands out in Prison Playbook is the powerful ensemble cast. Even after the series concludes, the unique personalities of the characters linger in the audience’s minds. Rather than focusing on popular K-drama stars, the show gives newcomers a chance to shine, and they certainly do not disappoint. Every actor fully embodies their role, contributing to the movie's heartwarming and humanistic tone.
Jung Hae In plays a memorable supporting role as Captain Yoo, who ends up in prison after being falsely accused of causing the death of one of his soldiers. Throughout his time behind bars, he shares a cell with a colorful group of individuals, each with their own unique backstory. Despite the prison setting, the film is surprisingly uplifting, filled with humor and humanity. This role marked a turning point in Jung Hae In’s career, earning him more attention for both his acting skills and charming looks.
IMDb Rating: 8.5

7. The Three Musketeers (2014)

7. The Three Musketeers (2014)
The Three Musketeers (2014) is a captivating adaptation of Alexandre Dumas' timeless novel about the legendary trio of musketeers. The series quickly became a sensation during its broadcast, not only in South Korea but also across various countries, creating a surge of online interest and viewership.
In this historical drama, Jung Hae In portrays Ahn Min Seo, the version of Aramis. A former monk, Min Seo joins the fight against the Chinese invasion and eventually becomes a military officer, partly due to his connection with So Hyun, even though their backgrounds are vastly different. His good looks win the admiration of many women, but Min Seo remains loyal to his Buddhist vows and dreams of a peaceful life after the war. However, he finds himself unwillingly drawn into political intrigue and palace conspiracies. This role marked Jung Hae In's debut as a lead actor, where he excelled not only with his captivating screen presence but also with his ability to fully embody his character. The series became a successful start for his promising career in acting.

9. Snowdrop (2021)
Snowdrop (2021), written by Yoo Hyun Mi, is a beautifully crafted story that blends romance with a historical backdrop, almost like a poetic dream. Yoo Hyun Mi nurtured this idea for 12 years before it finally came to life, and the result is a stunning visual and auditory experience that captivates its audience.
Set against the turbulent backdrop of the North and South Korean divide, the story follows Im Soo Ho (played by Jung Hae In), a North Korean soldier on the run. He is saved by Young Ro (Jisoo), and their bond deepens into a romance. However, their love is plagued by political tensions, and the realities of their divided countries make their relationship anything but simple.
Snowdrop is filled with the typical elements that define the best of Korean dramas, but its exploration of sensitive historical issues and a somewhat predictable storyline might limit its appeal to certain viewers. However, the performances of Jung Hae In and Jisoo were widely praised. Over the course of the 16-episode series, the chemistry between the two stars was undeniable, delivering powerful moments that left a lasting impact.
IMDb Rating: 8.2

10. Unframed: Blue Happiness (2021)
Unframed: Blue Happiness (2021) is a short film project written and directed by talented artists: Jung Min Park, Seok Gu Son, Hee Seo Choi, and Je Hoon Lee. It is the original production for the Watcha streaming service, which helped spark much excitement due to the unique combination of these free-spirited creators. The film's distinctive, fresh appeal was highly anticipated from the very beginning of its development.
In this film, Jung Hae In takes on the role of a young taxi driver struggling to make ends meet. Although only in his early twenties, his character faces numerous challenges in life. The story gradually unfolds, revealing more about his journey. This role further showcases Jung Hae In’s versatility, highlighting his remarkable ability to deeply immerse himself in different characters.
