Series synopsis
Dear X, also known as 친애하는 X is a South Korean drama crime television series that premiered on TVING on November 6, 2025. It ended on December 4, 2025. It was created by Ban Ji-woon. It stars Kim You-jung, Kim Young-dae, Kim Do-hoon and Lee Yul-eum.
Behind a beautiful face hides a cruel nature—Baek Ah-jin, who sees through and manipulates others' hearts. After stepping on the sacrifices of many to reach the top, everything begins to change the moment she arrives there. A woman wearing a mask to escape hell and climb to the highest place. And the story of the Xs being brutally crushed by her.
Premise
Behind a beautiful face hides a cruel nature—Baek Ah-jin, who sees through and manipulates others' hearts. After stepping on the sacrifices of many to reach the top, everything begins to change the moment she arrives there. A woman wearing a mask to escape hell and climb to the highest place. And the story of the Xs being brutally crushed by her.
Premise: "X" Marks Her Next Victim.
Cast and characters
Leading cast
- Kim You-jung as Baek Ah-jin
- Kim Young-dae as Yoon Joon-seo
- Kim Do-hoon as Kim Jae-oh
- Lee Yul-eum as Lim Le-na
Guest cast
- Hyeon Jin as Sim Sung-hee's Mom
- Bae Soo-bin as Baek Seon-gyu
- Lee Seo-an as Lim Sun-ye
- Gi So-you as Child Baek Ah-jin
- Kang Ian as Art Teacher
- Kim Yi-kyeong as Sim Sung-hee
- Yoon Joo as Class Teacher
- Kwon Su-yeon as Yu-bin
- Shin Eun-hye as Ga-yeong
- Woo Doo-yeon as Ethics Teacher
- Kim Ji-hoon as Choi Jeong-ho
- Hwang In-youp as Heo In-gang
Episodes
This series spans 1 season with 12 episodes.
| Season | Episodes | First aired | Last aired |
|---|---|---|---|
| Season 1 | 12 | November 6, 2025 | December 4, 2025 |
| Episode | Title | Air date |
|---|---|---|
| 1 |
Her "Xs" When Sung-hee attempts to expose Ah-jin's secrets, she strikes back with the help of fellow classmates. |
November 6, 2025 |
| 2 |
The Moment a Human Becomes a Devil Ah-jin is accepted into her dream law school, but her dreams are crushed when her father returns. |
November 6, 2025 |
| 3 |
Breaking the Shackles With her dream shattered, Ah-jin begins to work at a cafe and secretly schemes to manipulate Jung-ho. |
November 6, 2025 |
Production
Release
| Original network/platform | TVING |
|---|---|
| First aired | November 6, 2025 |
| Last aired | December 4, 2025 |
| Runtime | 64 minutes |
| Status | ended |
| Schedule | Thursday |