The First Man () is a 2025-26 South Korean television series written by and Ahn Jin-young, directed by , and starring Hahm Eun-jung, Oh Hyun-kyung, Yoon Sun-woo, Park Geon-il, and Kim Min-seol. The series follows the intertwined lives of two women driven by deadly desires, one seeking vengeance, and the other fueled by selfish ambition. It aired on MBC TV on December 15, 2025, to July 2, 2026, every Monday to Friday at 19:05 (KST).
Synopsis In 1995, twin sisters Oh Jang-mi and Ma Seo-rin were born. One of them was forcibly taken by Chae Hwa-young from their birth mother, Jeong Suk-hee. The child was later brought into Chairman Ma's house, where Hwa-young claimed her as her own child with Dong-seok. Ultimately, she joined the Chairman Ma's family and fulfilled her desire to enter the Dream Group. As the twins grow up, they lead vastly different lives, one is the spirited and righteous, and the other is a spoiled heiress. One day, when the twin sisters finally meet, they later decide to switch identities to uncover the hidden truth. Ma Seo-rin, who took on Oh Jang-mi's identity, was in a coma after an accident orchestrated by Chae Hwa-young, intended for Jang-mi. Jang-mi later assumed Seo-rin's identity to gather evidence against Chae Hwa-young, to crush and bring down the evil woman. As Kang Baek-ho and Kang Jun-ho, two brothers, become entwined with Jang-mi, romance, rivalry, and secrets slowly unfold.
Cast and characters
Main Hahm Eun-jung as Oh Jang-mi / Ma Seo-rin Oh Jang-mi: The older of the twins who is a warm-hearted and principled young woman with a culinary dream, working hard to open her own restaurant. She inherited her mother's culinary skills. Her dream is to meet Chef Kang Jun-ho and become his apprentice, and she even got an interview to work with him, but in the end she couldn't make it. One day, Jang-mi's world is turned upside down when she discovers that Chae Hwa-young, someone she once admired, is actually her arch-enemy. After uncovering the truth, a burning desire for justice consumes her, and Jang-mi sets out to punish Hwa-young for her heinous actions. Ma Seo-rin: The younger of the twins, who grew up as the spoiled and troublesome granddaughter of the Dream Group, is a reckless woman who fears nothing in life and has everything she wants. Separated from her birth mother and twin at birth by Chae Hwa-young, she was raised as her own, unaware of the hidden truth. Her goal is to win Kang Jun-ho's heart and make him her man. After being mistaken for Jang-mi, she's driven by curiosity to find her, and unexpectedly becomes the first to discover that she has a twin, leading her to dig into Hwa-young, who isn't biologically related to her. Oh Hyun-kyung as Chae Hwa-young A former top star who hides her tough ambition and strong will behind a beautiful smile. She is the daughter-in-law and CEO of the Dream Group, and Seo-rin's mother, who's ruining another woman's life to achieve her ambition of taking over the Dream Group. Fueled by her cruelness, she'll stop at nothing to keep Jang-mi from the Chairman and Seo-rin, even if it means silencing her forever. Yoon Sun-woo as Kang Baek-ho A lawyer at Law Firm Leeho. His strong sense of justice compels him to help those in need. He is always kept girls at a distance, but Jang-mi is the one who gets him to open his heart. When Hwa-young's orchestrated accident almost kills Jang-mi, he's the first to rescue her. Baek-ho is her constant ally in the pursuit of justice, truth, and revenge. Park Geon-il as Kang Jun-ho The head chef of Chang Restaurant at Dream Hotel, who is Baek-ho's older brother. He is a former three-star Michelin chef, known for being cold and unfeeling. But Jang-mi's presence brings out emotions he's never experienced before. He is Hwa-young's biological son, whom she desperately tried to find for many years, after leaving him in the orphanage to pursue a career and success. Seo-rin's obsession makes him uncomfortable, and his focus remains firmly on his work, with little regard for his love life, until the other twin enters the picture. Kim Min-seol as Jin Hong-ju The assistant manager, who later becomes team leader at the Dream Hotel, is a ruthless and ambitious woman with deep feelings for Baek-ho. She is Jun-ho's classmate at a culinary school in the US. She hates both of the twin sisters, one for always mocking and treating her like a servant, and the other for stealing her love.
Supporting Jang-mi's family as Jeong Suk-hee Jang-mi and Seo-rin's biological mother. She was once a bright and intelligent woman, but Hwa-young ruined her life. To protect the other twin, she took a risk and suffered a tragic accident that left her with the mental capacity of a five-year-old. Kim Hak-seon as Oh Bok-gil Jang-mi's adoptive father. He grew up with Suk-hee in an orphanage. After a tragic accident happened to her, he took care of her and her child and loves them like they're his own family. as Oh Tae-pyeong Jang-mi's adoptive older brother and the son of Bok-gil. He loves singing and chases his dreams, but repeatedly gets scammed and loses hope. He is Baek-ho's best friend. Jeon A-reum as Oh Tae-sook Bok-gil's daughter, who is Tae-pyeong's older sister, and Jang-mi's adoptive sister. Kim Ra-hee as Yeon Bo-ra Tae-sook's daughter.
Chairman Ma's family Lee Hyo-jung as Ma Dae-chang The chairman of the Dream Group. Kim Young-pil as Ma Dong-seok Jang-mi and Seo-rin's biological father, and Suk-hee's lover, who is the heir of the Dream Group, has gone missing for many years. Lee Jae-hwang as Lee Kang-hyuk Hwa-young's trusted secretary. Ahn Joo-in as Yang Geom-sun Chairman Ma's housekeeper.
Baek-ho's family Jung Chan as Kang Nam-bong Baek-ho's father. While working on the Dream Hotel’s reconstruction, he happened to meet Chae Hwa-young and eventually started an affair with her. as Han Young-ja Baek-ho's mother.
Hong-ju's family as Yeom San-wol Hong-ju's mother, who successfully seduces Chairman Ma and becomes his second wife. She is Hwa-young's elementary school classmate and her former assistant.
Production Development The First Man is directed by , who previously helmed Desperate Mrs. Seonju (2024–2025), and of The Second Husband (2021–2022), and Ahn Ji-young co-wrote the screenplay. Produced by MBC C&I and DK Entertainment and planned by Jang Jae-hoon, the series revolves around a woman driven by desire, who devastates another woman's life to attain her goal, while the other woman seeks revenge by choosing a new path. Director Kang stated that the title 'First Man' could also be called 'First Love'. He aimed to convey that love can help overcome any obstacle or hardship through this series.
On April 24, 2026, the series was extended by 20 episodes, from 120 to 140 episodes.
Casting In October 2025, Hahm Eun-jung, Oh Hyun-kyung, Yoon Sun-woo, Park Geon-il, and Kim Min-seol were officially confirmed to star. Additionally, Hahm previously led the KBS2 daily drama Queen's House (2025), and Kim Min-seol, a participant from Single's Inferno season 4, made her leading role debut in the series. The next month, it was announced that Lee Hyo-jung, Jung So-young, Jung Chan, and Lee Jae-hwang had joined the cast.
Release The First Man was set to premiere on MBC TV in the second half of 2025 and air in an MBC Monday–Friday timeslot. The series was originally scheduled to premiere on December 1, 2025, but was postponed. In November 2025, a script reading was revealed, and it was officially confirmed to premiere on December 15.
Original soundtrack Part 1
Part 2
Viewership
+ Average TV viewership ratings Original broadcast date Average audience share Nielsen KoreaNielsen Korea ratings:
Nationwide Seoul 1 December 15, 2025 4.9% 4.6% 2 December 16, 2025 4.5% 4.3% 3 December 17, 2025 5.1% 5.1% 4 December 18, 2025 5.3% 5.2% 5 December 19, 2025 5.2% 5.4% 6 December 22, 2025 5.2% 5.2% 7 December 23, 2025 5.5% 5.1% 8 December 24, 2025 4.7% 5.0% 9 December 25, 2025 5.6% 5.6% 10 December 26, 2025 5.1% 5.4% 11 December 29, 2025 5.0% 4.7% 12 December 30, 2025 5.5% 5.5% 13 December 31, 2025 4.6% 4.6% 14 January 1, 2026 5.0% 4.9% 15 January 2, 2026 5.0% 5.0% 16 January 5, 2026 5.0% 4.7% 17 January 6, 2026 5.6% 5.2% 18 January 7, 2026 5.0% 4.6% 19 January 8, 2026 5.1% 4.6% 20 January 9, 2026 5.0% 4.6% 21 January 12, 2026 5.5% 5.2% 22 January 13, 2026 4.9% 4.7% 23 January 14, 2026 5.0% 4.8% 24 January 15, 2026 5.1% 4.7% 25 January 16, 2026 5.1% 4.7% 26 January 19, 2026 5.4% 5.5% 27 January 20, 2026 5.3% 5.2% 28 January 22, 2026 5.4% 5.0% 29 January 23, 2026 4.8% 4.9% 30 January 26, 2026 5.2% 5.0% 31 January 27, 2026 5.3% 5.0% 32 January 28, 2026 5.1% 4.5% 33 January 29, 2026 5.1% 4.8% 34 January 30, 2026 5.0% 4.8% 35 February 2, 2026 5.2% 4.9% 36 February 3, 2026 5.1% 4.8% 37 February 4, 2026 5.3% 4.8% 38 February 5, 2026 5.4% 4.9% 39 February 6, 2026 5.1% 5.0% 40 February 9, 2026 5.2% 4.7% 41 February 10, 2026 4.9% 4.5% 42 February 11, 2026 5.1% 4.7% 43 February 12, 2026 5.1% 4.7% 44 February 13, 2026 4.8% 4.8% 45 February 16, 2026 3.6% 46 February 17, 2026 4.2% 4.1% 47 February 18, 2026 5.5% 5.9% 48 February 19, 2026 5.9% 5.5% 49 February 20, 2026 5.2% 5.2% 50 February 23, 2026 5.6% 5.4% 51 February 24, 2026 5.9% 5.2% 52 February 25, 2026 5.2% 4.7% 53 February 26, 2026 5.4% 5.4% 54 February 27, 2026 5.4% 5.0% 55 March 2, 2026 5.7% 5.5% ) 56 March 3, 2026 5.5% 5.1% ) 57 March 4, 2026 5.9% 5.5% 58 March 6, 2026 5.8% 5.8% 59 March 10, 2026 5.9% 5.5% 60 March 11, 2026 5.4% 5.0% 61 March 12, 2026 5.4% 4.7% 62 March 13, 2026 4.8% 4.6% 63 March 16, 2026 5.6% 5.3% 64 March 17, 2026 5.4% 5.1% 65 March 18, 2026 4.9% 4.1% 66 March 19, 2026 5.3% 5.0% 67 March 20, 2026 3.6% 68 March 23, 2026 5.7% 5.1% 69 March 24, 2026 5.6% 5.3% 70 March 25, 2026 4.9% 4.4% 71 March 26, 2026 5.3% 5.1% 72 March 27, 2026 5.2% 4.9% 73 March 30, 2026 5.7% 4.9% 74 March 31, 2026 5.6% 5.0% 75 April 1, 2026 5.4% 5.0% 76 April 2, 2026 5.3% 5.0% 77 April 3, 2026 5.4% 5.2% 78 April 6, 2026 5.9% 5.5% 79 April 7, 2026 5.4% 4.9% 80 April 8, 2026 4.8% 4.7% 81 April 9, 2026 5.7% 5.5% 82 April 10, 2026 5.2% 5.0% 83 April 13, 2026 5.7% 5.3% 84 April 14, 2026 5.5% 5.2% 85 April 15, 2026 5.0% 4.7% 86 April 16, 2026 5.3% 5.3% 87 April 17, 2026 5.3% 4.8% 88 April 20, 2026 5.8% 5.5% 89 April 21, 2026 5.4% 5.5% 90 April 22, 2026 5.2% 4.7% 91 April 23, 2026 5.4% 5.2% 92 April 24, 2026 4.9% 4.5% 93 April 27, 2026 6.0% 5.8% 94 April 28, 2026 5.6% 5.7% 95 April 29, 2026 4.9% 4.7% 96 April 30, 2026 5.5% 5.1% 97 May 1, 2026 4.8% 5.0% 98 May 4, 2026 4.8% 4.5% 99 May 5, 2026 5.1% 4.6% 100 May 6, 2026 4.8% 4.4% 101 May 7, 2026 4.9% 4.7% 102 May 8, 2026 4.5% 4.3% 103 May 11, 2026 5.6% 5.7% 104 May 12, 2026 4.9% 4.2% 105 May 13, 2026 4.4% 4.0% 106 May 14, 2026 5.1% 4.7% 107 May 15, 2026 4.9% 4.2% 108 May 18, 2026 5.1% 4.5% 109 May 19, 2026 5.0% 4.8% 110 May 20, 2026 5.5% 5.3% 111 May 21, 2026 5.2% 4.6% 112 May 22, 2026 4.5% 4.4% 113 May 25, 2026 5.5% 5.3% 114 May 26, 2026 5.2% 4.9% 115 May 27, 2026 5.6% 5.2% 116 May 28, 2026 5.4% 5.5% 117 May 29, 2026 5.1% 5.0% 118 June 1, 2026 5.6% 5.2% 119 June 2, 2026 5.4% 5.1% 120 June 4, 2026 5.4% 5.4% 121 June 5, 2026 4.8% 4.3% 122 June 8, 2026 5.4% 4.9% 123 June 9, 2026 5.5% 4.6% 124 June 10, 2026 5.4% 4.7% 125 June 11, 2026 5.5% 4.7% 126 June 12, 2026 5.3% 5.2% 127 June 15, 2026 5.7% 5.4% 128 June 16, 2026 5.2% 4.8% 129 June 17, 2026 5.2% 4.6% 130 June 18, 2026 5.1% 4.8% 131 June 19, 2026 6.0% 5.5% 132 June 22, 2026 6.1% 5.4% 133 June 23, 2026 5.6% 5.0% 134 June 24, 2026 5.4% 5.1% 135 June 25, 2026 5.5% 5.3% 136 June 26, 2026 6.0% 5.7% 137 June 29, 2026 5.8% 5.6% 138 June 30, 2026 139 July 1, 2026 5.9% 5.4% 140 July 2, 2026 6.0% 5.4% Average In the table above, the represent the lowest ratings and the represent the highest ratings.
References
External links