A new legal drama is bringing fresh cases and compelling characters to television. The show, called Pro Bono, started airing on December 6, 2025. It follows a successful judge who has to start over as a public interest lawyer. The series stars Jung Kyung-ho, known for his role in Hospital Playlist, and features a talented team of lawyers and legal professionals. This guide explains who plays whom in this new K-drama.
Main Characters and Cast of Pro Bono
The story of Pro Bono centers on a lawyer who loses his high-status job and has to find a new purpose. He is joined by a dedicated team determined to help people who cannot afford legal aid.
Jung Kyung-ho plays Kang David. David is a former judge with a perfect public image and a large social media following. An unexpected event forces him to leave his prestigious position. He then begins working as a public interest lawyer for a non-profit organization. In this new role, David uses his skills to help vulnerable clients while navigating his fallen status. Jung Kyung-ho is a well-known actor famous for his role as Kim Jun-wan in Hospital Playlist. He has also appeared in other popular dramas like Crash Landing on You and Crash Course in Romance.
So Joo-yeon plays Park Gi-ppeum. She is a public interest lawyer who is an expert in law and deeply committed to social justice. Gi-ppeum believes a lawyer’s main mission is to protect human rights. She works with Kang David at the non-profit organization, and together they take on cases to defend people in desperate situations. The actress So Joo-yeon has previously appeared in K-dramas like Dr. Romantic and The Midnight Romance in Hagwon.
The Pro Bono Legal Team
Kang David and Park Gi-ppeum are not working alone. They are part of a dedicated public interest team at their non-profit organization. Three other key actors play their colleagues.
Seo Hye-won plays Yoo Nan-hee. Seo Hye-won is known for her role in the fantasy drama Alchemy of Souls. Her character, Yoo Nan-hee, is a member of the Pro Bono legal team working alongside the main leads.
Yoon Na-moo plays Jang Yeong-sil. The actor Yoon Na-moo, recognized from Dr. Romantic, takes on the role of another lawyer on the team. Jang Yeong-sil works with David and Gi-ppeum on their cases.
Kang Hyung-seok plays Hwang Jun-woo. Rounding out the core team is Hwang Jun-woo, played by Kang Hyung-seok. Kang Hyung-seok has appeared in the hit series Hometown Cha-Cha-Cha.
The O&Partners Law Firm
The drama also features a powerful corporate law firm called O&Partners. This firm represents a different world of law, focused on business and wealth, which often contrasts with the work of the pro bono team.
Kim Kap-soo plays Oh Gyu-jang. He is the founder of the top-tier O&Partners law firm. Kim Kap-soo is a veteran actor recently seen in Queen of Tears.
Lee Yoo-young plays Oh Jung-in. She is the new Chief Executive Officer of O&Partners. Oh Jung-in is also the daughter of the firm’s founder, Oh Gyu-jang. Actress Lee Yoo-young is known for her role in Your Honor.
Choi Dae-hoon plays Woo Myung-hoon. This character is described as a former classmate of Kang David. Choi Dae-hoon, known for One Dollar Lawyer, makes a special appearance in the drama.
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Other Important Characters
Several other seasoned actors appear in the drama, adding depth to the story surrounding Kang David.
Sung Dong-il plays Chae Ho-jip. The character’s specific role in the legal world is part of the ongoing story.
Kim Jung-young plays Kim Seong-rye. She takes on the role of Kang David’s mother.
A new addition to the cast is Shin Hye-ji as Baek Han-byeol. She plays the granddaughter of a man named Baek Joong-seop and runs a dog cafรฉ. Her connection to the main legal plot is a developing part of the series.
Behind the Scenes and Premiere Details
Pro Bono is written by Moon Yoo-seok and directed by Kim Seong-yoon. The director is known for the popular drama Itaewon Class, which suggests a blend of compelling character development and social themes.
The series airs on tvN every Saturday and Sunday at 21:10 KST. It premiered on December 6, 2025. The production companies behind the drama include Sequence One and Studio Dragon.
The show’s music director is Park Sung-il, and the OST features well-known singers like K.Will, John Park, and Yangpa.
The main goal of the Pro Bono team in the drama is to use legal skills for public good. They plan to take on cases from large companies to fund their work defending people who cannot pay for a lawyer. This sets up the central conflict and purpose of the story.
Also Read: Pro Bono Release Schedule: Your Complete Guide to Episode Dates and Times
