A broker who joins forces with Kang Dong-woo to navigate the criminal underworld of Gangnam and assist in uncovering a conspiracy involving wealthy elites and corruption.
A steady professional partnership that bridges law enforcement and private intelligence, enabling coordinated operations against the cartel.
Seojin relies on Gilho's field intelligence to advance the official investigation.
A protective alliance forged through shared investigative goals, shifting toward a vengeful partnership after Jaehee is captured.
Seojin utilizes Gilho's field reports to navigate institutional and criminal obstacles.
Their approaches to the case temporarily diverge, creating friction before eventual convergence.
Explore the full interactive character relationship map of Gangnam B-Side