First Man (Korean: 첫 번째 남자) is an ongoing South Korean daily drama that premiered on MBC in December 2025. Centered on twin sisters separated at birth, the series weaves a complex tale of revenge, ambition, and entangled love set against the backdrop of a powerful corporate empire.

📺 Drama Details at a Glance

Detail	Information
Korean Title	첫 번째 남자 (Cheot Beonjjae Namja)
Network	MBC
Airing Schedule	Monday to Friday
Airing Time	19:05 (KST)
Episodes	120 (planned)
Episode Duration	Approximately 35 minutes
Content Rating	15+ (Teens 15 or older)
Premiere Date	December 15, 2025
Status	Currently Airing

📖 Synopsis: A Story of Stolen Lives

In 1995, twin sisters Oh Jang-mi and Ma Seo-rin were born. In a cruel twist of fate, one of them was forcibly taken from their birth mother by Chae Hwa-young, a manipulative former top star. The stolen child was raised as Hwa-young’s own daughter within the wealthy Ma family, owners of the powerful Dream Group, allowing Hwa-young to fulfill her ambition of entering the corporate dynasty.

The twins grow up living completely different lives:

• Oh Jang-mi is warm-hearted, principled, and dreams of opening her own restaurant.
• Ma Seo-rin becomes the spoiled, reckless, and entitled heiress to the Dream Group fortune.

Their destinies collide when the twins’ paths cross as adults, setting off a chain reaction of secrets and conflicts. The story is further complicated by their relationships with two brothers: Kang Baek-ho, a kind lawyer, and Kang Jun-ho, a cold celebrity chef. At its core, the drama is a “double story of revenge,” where one woman lives another’s life for vengeance, while the other stole an existence to fulfill her ambitions.

👥 Main Cast & Characters

Actor	Role	Description
Hahm Eun-jung	Oh Jang-mi / Ma Seo-rin	Plays the dual role of the separated twin sisters: the righteous Jang-mi and the heiress Seo-rin.
Oh Hyun-kyung	Chae Hwa-young	The ambitious former star who stole a child to infiltrate the Ma family and seize control of Dream Group.
Yoon Sun-woo	Kang Baek-ho	A warm-hearted lawyer with a strong sense of justice, who finds himself drawn to Jang-mi.
Park Geon-il	Kang Jun-ho	Baek-ho’s older brother, a perfectionist Michelin-starred chef whose cold exterior begins to thaw because of Jang-mi.
Kim Min-seol	Jin Hong-ju	A ruthless, ambitious employee at Dream Hotel whose obsession with Baek-ho turns her into Jang-mi’s rival.

🎬 Production Notes

• Directors and Writers: The series is directed by Kang Tae-heum and written by Seo Hyun-joo and Ahn Jin-young.
• The Title’s Meaning: The director has explained that the title First Man can also be interpreted as “First Love,” and that the series aims to show how love can help overcome life’s hardships.
• A Major Debut: For actress Kim Min-seol, this drama marks her first leading role following her appearance on the popular dating show Single’s Inferno

How to Watch

• In South Korea: The drama airs on MBC TV every weekday at 7:05 PM KST.
• Internationally: It is available for streaming on Kocowa, which simulcasts the episodes. Additionally, in some regions like North America, it airs on MBC America with multiple replay times throughout the day.

I hope this provides a comprehensive overview of First Man. If you’re interested in a specific aspect of the plot or a particular character’s storyline, feel free to ask for more details.