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TV series

Dear X

2025· 1 season· 64 min episodesTV-MA★ 8.7Ended

On TVING — From Monster Union · Siwoo Company

"X" Marks Her Next Victim.

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Where to watch

Not available to stream in US

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Synopsis

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.

Themes

Episodes

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  1. E1 Her "Xs"Next upNov 6, 2025 · 59 min
    Synopsis

    When Sung-hee attempts to expose Ah-jin's secrets, she strikes back with the help of fellow classmates.

    Guest stars: Jo Hyeon-jin (Sim Sung-hee's Mom), Bae Soo-bin (Baek Seon-gyu), Lee Seo-an (Lim Sun-ye), Gi So-you (Child Baek Ah-jin), Kang Ian (Art Teacher), Kim Yi-kyeong (Sim Sung-hee), Yoon Joo (Class Teacher), Kwon Su-yeon (Yu-bin)

  2. E2 The Moment a Human Becomes a DevilNov 6, 2025 · 56 min
    Synopsis

    Ah-jin is accepted into her dream law school, but her dreams are crushed when her father returns.

    Guest stars: Bae Soo-bin (Baek Seon-gyu), Lee Seo-an (Lim Sun-ye), Gi So-you (Child Baek Ah-jin), Kang Ian (Art Teacher), Kim Yi-kyeong (Sim Sung-hee), Kim Ji-hoon (Choi Jeong-ho), Kim Ji-young (Seo Mi-ri), Hong Bi-ra (Moon Do-hui)

  3. E3 Breaking the ShacklesNov 6, 2025 · 66 min
    Synopsis

    With her dream shattered, Ah-jin begins to work at a cafe and secretly schemes to manipulate Jung-ho.

    Guest stars: Bae Soo-bin (Baek Seon-gyu), Kim Ji-hoon (Choi Jeong-ho), Baek Sun-ho (Xanadu Coffee customer), Kim Ji-young (Seo Mi-ri), Hong Bi-ra (Moon Do-hui), Jeon Kuk-hwan (Jun-seo's Grandfather), Lee Seung-jin (Detective), Kim Sang-il (Im Seung-yong)

  4. E4 No Turning BackNov 6, 2025 · 66 min
    Synopsis

    As suspicions fall on Ah-jin with nowhere to turn, she is approached by Mi-ri, who steps in to save her.

    Guest stars: Kim Ji-hoon (Choi Jeong-ho), Hyun Seo-ha (Seok Hyang-i), Kim Ji-young (Seo Mi-ri), Shin Mun-sung (Park Dae-ho), Hong Bi-ra (Moon Do-hui), Kim Se-yoon (Detective), Kim Yu-mi (Hwang Ji-seon), Kim Jae-il (Internal Affairs Officer)

  5. E5 Grant Me the Power to Rise to the TopNov 13, 2025 · 65 min
    Synopsis

    Ah-jin makes her debut as an actress and grows increasingly wary of Lena.

    Guest stars: Hwang In-youp (Heo In-gang), Hyun Seo-ha (Seok Hyang-i), Kim Ji-young (Seo Mi-ri), Shin Mun-sung (Park Dae-ho), Hong Bi-ra (Moon Do-hui), Jeon Kuk-hwan (Jun-seo's Grandfather), Choi Sol-hee (Jae-oh's Aunt), Kim Il-woo (Hong Su-hyeok)

  6. E6 Setting the TrapNov 13, 2025 · 72 min
    Synopsis

    Determined to advance her career, Ah-jin sets her sights on top star, Heo In-gang.

    Guest stars: Hwang In-youp (Heo In-gang), Park Seoung-tae (Heong Gyeong-tae), Hyun Seo-ha (Seok Hyang-i), Kim Ji-young (Seo Mi-ri), Shin Mun-sung (Park Dae-ho), Hong Bi-ra (Moon Do-hui), Ryu Kyeong-hwan (Im Hui-guk), Yoon Hyun-soo (Ryu Ji-hyeok)

  7. E7 The Wheel of FateNov 20, 2025 · 75 min · ★ 8.7
    Synopsis

    Ah-jin's year-long romance with In-gang deepens, but her past is at risk of being exposed.

    Guest stars: Kim Yi-kyeong (Sim Sung-hee), Kim Ji-hoon (Choi Jeong-ho), Hwang In-youp (Heo In-gang), Park Seoung-tae (Heong Gyeong-tae), Hyun Seo-ha (Seok Hyang-i), Kim Ji-young (Seo Mi-ri), Hong Bi-ra (Moon Do-hui), Jeon Kuk-hwan (Jun-seo's Grandfather)

  8. E8 Before JudgmentNov 20, 2025 · 83 min · ★ 8.7
    Synopsis

    After his grandmother's passing, In-gang proposes, but Ah-jin ends their relationship instead.

    Guest stars: Kim Yi-kyeong (Sim Sung-hee), Kim Ji-hoon (Choi Jeong-ho), Hwang In-youp (Heo In-gang), Park Seoung-tae (Heong Gyeong-tae), Jung Woo (Seol Yeong-uk), Kim Ji-young (Seo Mi-ri), Hong Bi-ra (Moon Do-hui), Ryu Kyeong-hwan (Im Hui-guk)

  9. E9 New HeightsNov 27, 2025 · 47 min · ★ 9.0
    Synopsis

    As Ah-jin faces public backlash for her break up with In-gang, a wealthy savior comes to her rescue.

    Guest stars: Kim Yi-kyeong (Sim Sung-hee), Kim Ji-young (Seo Mi-ri), Hong Bi-ra (Moon Do-hui), Ryu Kyeong-hwan (Im Hui-guk), Hong Jong-hyun (Moon Do-hyeok), Son Kang-gook (An Do-gang), Kim Il-woo (Hong Su-hyeok), Kim Yu-mi (Hwang Ji-seon)

  10. E10 The Monster in the MirrorNov 27, 2025 · 59 min · ★ 8.3
    Synopsis

    Jun-seo learns the secret of his birth and leaves Ah-jin’s side while she marries Do-hyuk.

    Guest stars: Kim Yi-kyeong (Sim Sung-hee), Hong Jong-hyun (Moon Do-hyeok), Son Kang-gook (An Do-gang), Kim Il-woo (Hong Su-hyeok), Kim Yu-mi (Hwang Ji-seon), Go Seo-hee (Madam Gong), Park Bu-keon (Director Park), Yeo Dae-hyun (Detective)

  11. E11 Save Me, My GodDec 4, 2025 · 67 min · ★ 8.3
    Synopsis

    Ah-jin discovers the unnerving truth about her husband. Desperate to break free, she turns to Jae-oh.

    Guest stars: Bae Soo-bin (Baek Seon-gyu), Kim Yi-kyeong (Sim Sung-hee), Ryu Kyeong-hwan (Im Hui-guk), Hong Jong-hyun (Moon Do-hyeok), Son Kang-gook (An Do-gang), Kim Yu-mi (Hwang Ji-seon), Kim Min-song (Tattoo Man), Kim Nam-hee (Documentary Host)

  12. E12 The Final XDec 4, 2025 · 56 min · ★ 8.8
    Synopsis

    Ah-jin’s deepest darkest secrets are revealed just as she rises to the very top.

    Guest stars: Kang Ian (Art Teacher), Kim Yi-kyeong (Sim Sung-hee), Hong Jong-hyun (Moon Do-hyeok), Lee Woong-jae (Heo In-mo), Son Kang-gook (An Do-gang), Kim Yu-mi (Hwang Ji-seon), Kim Min-song (Tattoo Man), Kim Nam-hee (Documentary Host)

Cast & crew

Created by Ban Ji-woon

Videos

Trailers

Featurettes

Images · 14

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Reviews · from TMDB members

slowedown★ 4/10Jan 13, 2026

Story of a girl that destroys lives. She is evil, and what made her evil and not just a bad person, was that she used people she deemed as good. She targeted people that were caring and tried to live good lives. I wanted to feel sorry for her because she was given two horrible parents and she never recovers from their effect. The saddest part of this show was that she absolutely destroys the people that care about her. I was heartbroken for them. The performances were believa… Read more

ble which was worse for me. These people were irredeemable. Kim You Jung (Baek Ah Jin) was great. Kim Young Dae (Yoon Jun Seo) and Kim Do Hoon (Kim Jae Ho) performances were award winning. I felt so sorry for their characters. Both deserved better. I would say the story was original and the players were consistent in their lunacy. This show left me sadder than I was when I started it. What a waste of lives. I am reluctant not to recommend because it was engaging but I will never rewatch it. The acting is wonderful but so much anguish. True to the K-drama formula, yes, someone dies (several) and you feel like living a little less at the end.