[Kdrama] Our Unwritten Seoul Cast & Filming Location & Plot

In Seoul, a city both unfamiliar and familiar, unfolds the life-changing story of twin sisters! Following Resident Playbook, tvN’s new weekend drama Our Unwritten Seoul tells the unpredictable romantic coming-of-age tale of identical twin sisters Yoo Mi-ji and Yoo Mi-rae (Park Bo-young takes on a dual role!), who, despite looking exactly alike, have completely different personalities and lives. When they decide to swap lives, their worlds are turned upside down.

Mi-ji (played by Park Bo-young), the younger sister, lives freely in the rural village of Duseon-ri, but is constantly compared to her older sister Mi-rae (also played by Park Bo-young), who works in Seoul. Contrary to everyone’s assumptions, Mi-rae is actually struggling and on the brink in the harsh reality of Seoul life. Upon learning about her sister’s difficult situation, Mi-ji proposes a secret pact: “Let’s switch lives for a few months!” This lie between the two sisters sets off a whirlwind of chaos that shakes both Seoul and Duseon-ri…

Here is an introduction to the filming locations and storyline of Our Unwritten Seoul.

Our Unwritten Seoul

Korean 미지의 서울 | 未知のソウル
Genre: Romantic Comedy, Coming-of-Age, Healing, Human
Airtime: Saturday & Sunday / 9:20 PM ~
Broadcast Period: May 24, 2025 ~ June 29, 2025
Number of Episodes: 12
Planning: Studio Dragon
Production Companies: Monster Union, High Ground
Channel: tvN
Directors: Park Shin-woo, Nam Geon
Screenwriter: Lee Kang
Cast: Park Bo-young, Park Jin-young, Ryu Kyung-soo, etc.
Filming Period: October 2024 ~ April 28, 2025 (Pre-produced)
Network: TVING, NETFLIX

Our Unwritten Seoul cast

Yoo Mi-ji / Park Bo-young

The younger of the identical twin sisters, Mi-ji lives in the rural village of Duseon-ri, working odd jobs around the community without a proper occupation. She is constantly compared to her older sister Mi-rae, who works in Seoul, but Mi-ji has a bright and free-spirited personality. Upon discovering her sister’s harsh reality, she proposes a secret pact to swap lives, kicking off the twins’ web of lies.

(Park Bo-young will portray four different faces: Yoo Mi-ji, Yoo Mi-rae, and each sister pretending to be the other.)

Yoo Mi-rae / Park Bo-young

The older of the identical twin sisters, Mi-rae works in Seoul and appears to lead a successful life. In reality, however, she is pushed to the edge by the hardships of city life. At Mi-ji’s suggestion, she goes down to Duseon-ri and lives as Mi-ji, experiencing a new life she never expected.

Lee Ho-soo / Park Jin-young

A top lawyer at a major law firm, Ho-soo has striking looks and an effortlessly cool demeanor. On the surface, he seems flawless, but in truth, he works harder than anyone else to lead an ordinary life. He is a high school friend of the twin sisters, with whom he once shared pain, and after a chance encounter with Mi-ji in Seoul, he gets caught up in the twins’ secret pact.

GOT7 Jinyoung Instagram

Han Se-jin / Ryu Kyung-soo

A novice owner of a strawberry farm. He has little talent for farming and carries a distinctly urban vibe. He becomes involved with Mi-rae, who is pretending to be Mi-ji in Duseon-ri, as her employer. His clumsy hands and suspicious air make Mi-rae’s instincts tingle. His true identity and story add intrigue to the drama.

Ryu Kyung-soo Instagram

Other Cast of Our Unwritten Seoul

Details

Kim Rosa / Won Mi-kyung

70-year-old woman, owner of a chicken gizzard soup restaurant and the landlord of Rosa Restaurant.

Lee Chung-gu / Im Chul-soo

43-year-old man, managing partner of the law firm Wongun and Ho-soo’s senior.

Park Ji-yoon / Yoo Yoo-jin

30-year-old woman, works at J Card, high school friend of Mi-ji and Mi-rae.

Song Kyung-gu / Moon Dong-hyuk

30-year-old man, deputy manager at Kyung-gu Mart, Mi-ji’s ex-boyfriend and current best friend.

Kim Ok-hee / Jang Young-nam

54-year-old woman, elementary school lunch chef, mother of Mi-ji and Mi-rae.

Yeom Bun-hong / Kim Sun-young

54-year-old woman, vice principal at elementary school, Ho-soo’s mother.

Kang Wol-soon / Cha Mi-kyung

80-year-old woman, grandmother of Mi-ji and Mi-rae.

Choi Tae-gwan / Jung Seung-gil

50-year-old man, director of the Planning and Coordination Bureau at Korea Financial Management Corporation.

Shin Kyung-min / Lee Si-hoon

47-year-old man, team leader of the Strategic Planning Team at Korea Financial Management Corporation.

Ahn Mi-jung / Actress TBD

Woman in her 30s, senior member of the Strategic Planning Team at Korea Financial Management Corporation.

Hwang Yoon-ho / Yang Dae-hyuk

Man in his 30s, senior member of the Strategic Planning Team at Korea Financial Management Corporation.

Lee Hyo-kyung / Shim So-young

Woman in her 30s, senior member of the Strategic Planning Team at Korea Financial Management Corporation.

Kim Tae-yi / Hong Sung-won

28-year-old man, data analyst in the Strategic Planning Team at Korea Financial Management Corporation.

Hwang Ji-soo / Actress TBD

40-year-old woman, law firm secretary, Ho-soo’s personal assistant.

Jo Myung-gap / Jung Eun-pyo

68-year-old man, head of the Duseon-ri Youth Association.

Gong Il-nam / Actor TBD

42-year-old man, member of the Duseon-ri Youth Association, runs Mojong Market.

Kim Soo-yeon / Park Ye-young

35-year-old woman, former senior member of the Strategic Planning Team at Korea Financial Management Corporation.

Our Unwritten Seoul filming location

Mungyeong

Gyeongsangbuk-do Mungyeong-si Danggyo-ro 2255

Damyang Subuk Elementary School

Jeollanam-do Damyang-gun Subuk-myeon Chuseong 1-ro 714-3

Suncheon Drama Filming Set

Jeollanam-do Suncheon-si Jorye-dong Biregol-gil 24-4

Seoul Station

405 Hangang-daero, Yongsan-gu, Seoul

Cheonggye Plaza (Seoul Lantern Festival)

14-12 Seorin-dong, Jongno-gu, Seoul

The Seoul Lantern Festival is one of Seoul’s representative winter night festivals, held annually around Cheonggye Plaza and Cheonggyecheon Stream. First launched in 2009, the festival is now in its 16th year. It lights up the winter nights along Cheonggyecheon with beautiful illuminated installations and a variety of hands-on programs, making it a famous spot for photography as well. Unfortunately, the festival is only held during the winter each year.

Banpo Hangang Park

122-1 Jamwon-dong, Seocho-gu, Seoul

Other Filming Location

Gwangtonggyo Bridge
Near 124 Seorin-dong, Jongno-gu, Seoul

Dongjak Bridge
20-1 Dadong, Jung-gu, Seoul

Our Unwritten Seoul Plot summary

Twin sisters Yoo Mi-ji and Yoo Mi-rae may look identical, but everything else about them is different—from their backgrounds and personalities to their values. The younger sister, Yoo Mi-ji, was once a promising track and field athlete, but after an injury ended her career, she began living a free-spirited and spontaneous life, moving from one part-time job to another. In contrast, the older sister, Yoo Mi-rae, is a perfectionist who attended a prestigious university and works at a public corporation, but she hides her inner anxiety, worn out by others’ expectations and her own self-criticism.

Through the twins’ life-swapping adventure, they encounter Lee Ho-soo, a top law firm attorney, and Han Se-jin, who left the glamorous world of finance to become a farm owner. This romantic coming-of-age drama follows these characters, each with their own wounds and struggles, as they search for true happiness, real love, and the courage to live as their authentic selves.

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