Branding in Seongsu

Branding in Seongsu is a 2024 South Korean romantic thriller mid-form series created by Choi Sun-mi, co-written by Choi and Jeon Sun-young, directed by Jun Heon-soo, and starring Kim Ji-eun, Lomon, Yang Hye-ji, and Kim Ho-young. It was released on U+ Mobile TV from February 5, to March 14, 2024. It is also available for streaming on Lemino in Japan, and Viki and Viu in selected regions.

Synopsis
It is a relationship-reversal romantic thriller set in the branding mecca of Seongsu-dong that follows the soul-swapping story of Kang Na-eon, a tough marketing team leader, and So Eun-ho, a flirtatious intern.

Main

 * Kim Ji-eun as Kang Na-eon
 * The youngest marketing team leader who succeeds in every project she touches.


 * Lomon as So Eun-ho
 * A veteran intern who is responsible for the cuteness of a marketing agency with his sad look and youthful appearance.


 * Yang Hye-ji as Do Yu-mi
 * A cute and bubbly marketer but sometimes an idiot.


 * Kim Ho-young as Cha Jeong-wu
 * The art director of Seongsu Agency and Na-eon's best friend of eight years.

Supporting

 * Ahn Yeon-hong as Min Hee-jung
 * CEO of Seongsu Agency and Na-eon's mentor.


 * Park Gi-deok as Han Yi-jae
 * An executive of Segye Group, the parent company of Seongsu Agency.


 * Kim Byul as Nam Byeol
 * Seongsu Agency's marketing team 2 leader and keeps Na-eon in check.


 * Jung Yi-rang as Ri Yeong-ae
 * A veteran marketer who has been with the agency since its foundation but became part of the underdog team after being hit by young marketers.


 * Jeon Joon-ho as Joo Rex
 * A very popular guy with his world-warming appearance and style, and has a good personality, but in fact has a big twist.


 * Chae Soo-ah as Park Jenny
 * An influencer who epitomizes the MZ generation and a member of the Seongsu Agency who entered the underdog team as a high school graduate.


 * Yeon Ji-hyun as Seo Wool-soop
 * An intern at Seongsu Agency.


 * Kim Young-jae as Seong Su-dong
 * An intern at Seongsu Agency. He is a talented person with a cool appearance and personality, who listens and sympathizes with Eun-ho.


 * Ahn Jin-ah as Namgung Da-eun
 * Eun-ho's first love.


 * Park Young-woon as Nam Yun-hyeok
 * A top star celebrity.


 * Lee Kwang-hee as Hwang Jae-ha
 * A charming third generation chaebol who is cheeky but impossible to hate.

Special appearance

 * Shin Hyun-soo as Kim Jin-seok
 * CEO of beauty brand XU who has a cool-headed personality that puts people's abilities unlike his gentle smile. (episode 1–4)

Production
Produced and planned by LG Uplus' content production division Studio X+U with Studio Vplus and Higround as co-producers, created by Choi Sun-mi, directed by Jung Heon-soo, who worked on Twelve Nights (2018), and co-written by Choi and Jeon Sun-young.

Kim Ji-eun and Lomon were confirmed as the main cast of the series. Later, Yang Hye-ji and Kim Ho-young were added to the main list.

The OST singing lineup of Branding in Seongsu — consists of Bang Ye-dam, Yoo Sung-eun, Mrch, Yoo Yeon-jung (WJSN), The Bain (Choi Bo-hoon), and Bora (Cherry Bullet) — was released through OST production company Vlending Co., Ltd. and Studio X+U social media accounts includes various styles of vocals and fresh and trendy artists, drawing expectations from music and drama fans even before the series air.

Release
Studio X+U confirmed the release date which would be on February 5, 2024, and each episode was released every Monday to Thursday. In addition, it is available to stream on OTT platforms such as Viki in 190 countries, Lemino in Japan, and Viu in 16 countries.