Oh Sang-sik is the manager of Sales Team 3 at One International and the mentor figure who reluctantly takes Jang Geu-rae under his wing. Gruff, hot-tempered, and fiercely loyal to his team, he embodies the old-school work ethic of a middle manager who has clawed his way up through years of corporate grind while trying to hold onto his principles.
Though he initially resents being saddled with an unqualified intern, Sang-sik comes to see in Geu-rae a sincerity and resilience that mirror his own buried idealism. Their evolving bond, built on small acts of trust and shared frustration with company politics, anchors the drama's emotional weight and gives its workplace conflicts a human center.
Sang-sik's storyline also explores the toll that corporate loyalty exacts on family life and personal integrity, as he repeatedly chooses to protect his subordinates even at cost to his own standing. His mixture of toughness and decency made him one of the standout characters of the series and a defining role for actor Lee Sung-min.
Oh Sang-sik is one of the central figures in Misaeng: Incomplete Life, a drama/workplace/slice-of-life/korean series that aired on tvN from 2014. Within the narrative of Misaeng: Incomplete Life, Oh Sang-sik serves as a pivotal character whose decisions and relationships drive key story arcs throughout Season 1. The character's journey has been central to many of the show's most memorable and discussed moments.
Portrayed by Lee Sung-min, Oh Sang-sik has become one of the most recognizable characters in modern television. Lee Sung-min's performance brings nuance and depth to the role, creating a character that resonates with audiences on both intellectual and emotional levels. Lee Sung-min's work has been recognized with 1 major award, reflecting the critical acclaim their portrayal has received.
Explore More on TVCeleb
TVCeleb.com is the internet's most comprehensive resource for television character fandom, covering 1400 acclaimed TV series with 4277 detailed character profiles and 3410 actor biographies. Our coverage spans 408 genres across 383 networks and streaming platforms, with content organized to help fans discover, explore, and engage with television from every angle.
Browse our collection by genre to find shows in your preferred category, by network to see what's available on your streaming platform, by decade to explore different eras of television history, or by curated lists that group characters by archetype and achievement. Each show page features expanded synopses, production details, and video content, while character pages include detailed arc analysis, key episodes, quotes, trivia, and fan ecosystem mapping.
Every character on TVCeleb is scored using our proprietary Fan Heat Index, which measures engagement, social activity, meme velocity, fan art density, and fandom longevity on a scale of 0 to 100. This data-driven approach provides objective insight into which characters have inspired the most passionate and active fan communities. Use the search page to find any character, show, or actor instantly, or start browsing from our homepage to discover what's trending in television fandom today.
? Frequently Asked Questions
Oh Sang-sik is played by veteran South Korean actor Lee Sung-min, in one of the role he is most associated with.
He is the manager of Sales Team 3 at One International and serves as Jang Geu-rae's demanding but ultimately protective mentor.
