Crime Drama
8.2/10 2025 · 1 Season· 12 Episodes · Completed ·KR

Creator: Ban Ji-woon

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.

Cast

Kim Yoo-jung
Kim Yoo-jung
Baek Ah-jin
Kim Young-dae
Kim Young-dae
Yoon Joon-seo
Kim Do-hoon
Kim Do-hoon
Kim Jae-oh
Lee Yul-eum
Lee Yul-eum
Lim Le-na
Hyeon Jin
Hyeon Jin
Sim Sung-hee's Mom
Bae Soo-bin
Bae Soo-bin
Baek Seon-gyu
Lee Seo-an
Lee Seo-an
Lim Sun-ye
Gi So-you
Gi So-you
Child Baek Ah-jin
Kang Ian
Kang Ian
Art Teacher
Kim Yi-kyeong
Kim Yi-kyeong
Sim Sung-hee
Yoon Joo
Yoon Joo
Class Teacher
Kwon Su-yeon
Kwon Su-yeon
Yu-bin
Shin Eun-hye
Shin Eun-hye
Ga-yeong
Woo Doo-yeon
Woo Doo-yeon
Ethics Teacher
Kim Ji-hoon
Kim Ji-hoon
Choi Jeong-ho
Hwang In-yeop
Hwang In-yeop
Heo In-gang
Baek Sun-ho
Baek Sun-ho
Xanadu Coffee cus...
Park Seoung-tae
Park Seoung-tae
Heong Gyeong-tae
Jung Woo
Jung Woo
Seol Yeong-uk
Hyun Seo-ha
Hyun Seo-ha
Seok Hyang-i

Episodes

Dear X (2025) S01E01 – Her “Xs” S01E01 59m
6 Nov 25
Dear X (2025) S01E01 – Her “Xs”
When Sung-hee attempts to expose Ah-jin's secrets, she strikes back with the help of fellow classmates.
Dear X (2025) S01E02 – The Moment a Human Becomes a Devil S01E02 56m
6 Nov 25
Dear X (2025) S01E02 – 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.
Dear X (2025) S01E03 – Breaking the Shackles S01E03 66m
6 Nov 25
Dear X (2025) S01E03 – Breaking the Shackles
With her dream shattered, Ah-jin begins to work at a cafe and secretly schemes to manipulate Jung-ho.
Dear X (2025) S01E04 – No Turning Back S01E04 66m
6 Nov 25
Dear X (2025) S01E04 – No Turning Back
As suspicions fall on Ah-jin with nowhere to turn, she is approached by Mi-ri, who steps in to save her.
Dear X (2025) S01E05 – Grant Me the Power to Rise to the Top S01E05 65m
13 Nov 25
Dear X (2025) S01E05 – Grant Me the Power to Rise to the Top
Ah-jin makes her debut as an actress and grows increasingly wary of Lena.
Dear X (2025) S01E06 – Setting the Trap S01E06 72m
13 Nov 25
Dear X (2025) S01E06 – Setting the Trap
Determined to advance her career, Ah-jin sets her sights on top star, Heo In-gang.
Dear X (2025) S01E07 – The Wheel of Fate S01E07 75m
20 Nov 25
Dear X (2025) S01E07 – The Wheel of Fate
Ah-jin's year-long romance with In-gang deepens, but her past is at risk of being exposed.
Dear X (2025) S01E08 – Before Judgment S01E08 83m
20 Nov 25
Dear X (2025) S01E08 – Before Judgment
After his grandmother's passing, In-gang proposes, but Ah-jin ends their relationship instead.
Dear X (2025) S01E09 – New Heights S01E09 47m
27 Nov 25
Dear X (2025) S01E09 – New Heights
As Ah-jin faces public backlash for her break up with In-gang, a wealthy savior comes to her rescue.
Dear X (2025) S01E10 – The Monster in the Mirror S01E10 59m
27 Nov 25
Dear X (2025) S01E10 – The Monster in the Mirror
Jun-seo learns the secret of his birth and leaves Ah-jin’s side while she marries Do-hyuk.
Dear X (2025) S01E11 – Save Me, My God S01E11 67m
4 Dec 25
Dear X (2025) S01E11 – Save Me, My God
Ah-jin discovers the unnerving truth about her husband. Desperate to break free, she turns to Jae-oh.
Dear X (2025) S01E12 – The Final X S01E12 56m
4 Dec 25
Dear X (2025) S01E12 – The Final X
Ah-jin’s deepest darkest secrets are revealed just as she rises to the very top.

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