South Korean actress Kim Yoo-jung returns on screen with TVING’s newest thriller-romance K-drama Dear X, playing the role of Baek Ah-jin, a top actress known for her kindness and beauty—but was it the real her?
Dear X, an upcoming Korean series based on a webtoon, is headlined by Kim Yoo-jung as Baek Ah-jin, Kim Young-dae as Yun Jun-seo, Kim Do-hoon as Kim Jae-oh, and Lee Yul-eum as Im Re-na. The series follows the story of the popular actress Baek Ah-jin. She was known for her graceful beauty and kindness, but that perfect girl image hides a dark side.
Behind Ah-jin’s beautiful image is a calculating and manipulative sociopath who uses the people around her to achieve success and rise to the top. But as soon as her perfect life starts to crumble, the people closest to her are dragged down with her downfall. Yun Jun-seo, her lifelong friend, and Kim Jae-oh, a man from her painful past, become part of her fall from grace. The series explores trauma, ambition, and the destructive aftermath of fame.
Also Read: Dear X Release Date, Where to Watch, and More Details
Cast of Dear X and Their Roles in the Series
Kim Yoo-jung as Baek Ah-jin
Portraying the role of Baek Ah-jin is the versatile actress Kim Yoo-jung. In the series, Ah-jin is a well-known actress. She has beauty, glamour, and style. In front of the camera, she possesses an enchanting smile and kindness you’ll fall for.
But behind her perfect image lies a dark side. Ah-jin always calculates her actions and manipulates the people around her. She uses them for her own success and to remain on top.
Kim Young-dae as Yun Jun-seo
Yun Jun-seo is Ah-jin’s childhood friend who always protects her. Jun-seo is willing to do anything for her. Despite knowing the twisted side of Ah-jin, he’s still ready to dive into her chaos. Jun-seo’s character shows how someone can love a person despite how wicked they are.
Kim Do-hoon as Kim Jae-oh
Someone from Ah-jin’s heartbreaking past, Kim Jae-oh becomes a man willing to serve Ah-jin’s ambitions. Will he become Jun-seo’s rival for Ah-jin’s heart, or is he just another tool for her success?
Lee Yul-eum as Im Re-na
Adding more tension to the series is Im Re-na, Ah-jin’s rival. She was an idol who became an actress, threatening Ah-jin’s place in the industry. With her rivalry with Ah-jin, Re-na will surely become another interesting character in the series.
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Other Cast Members
- Kim Yi-kyung as Shim Sung-hee — another rival of Baek Ah-jin. Her jealousy and resentment will cause more conflict in the series.
- Bae Soo-bin as Baek Seon-gyu — Ah-jin’s father, the cause of her traumatic experiences in the past.
- Kim Yoo-mi as Hwang Ji-seon — Yun Jun-seo’s mother who condemns her son’s devotion to Ah-jin.
Dear X Trailer and What We Know So Far
HBO Max Asia dropped the trailer for Dear X on October 21, 2025, through their YouTube channel. The trailer showed what kind of person Baek Ah-jin is—with and without a camera. Some people know her as kind and smart, while others describe her as manipulative and twisted.
I’ll climb to the top, where no one will dare stand in my way. They’re just steps that I need to climb. A lovely set of steps that will help me get to the top.
The series is a 12-episode romance thriller brought by TVING. It will premiere on November 6, 2025. You can stream the series on HBO Max, TVING, and Viki Rakuten.
Source: HBO Max Asia, TVING, The Korea Times
