Advertisement "The Youngest Son of a Chaebol Family" is a drama based on a popular web novel of the same name. It depicts the story of the protagonist killed by the family of chaebol owners who he had been loyal to for more than a decade, returning as their youngest son and growing up step by step to take over the entire chaebol family. While Lee Sung-min have been confirmed for the cast, Shin Hyun-bin has been picked up for the leading female role of Seo Min-yeong. Seo Min-yeong is an almost corrupted investigator who will do anything for justice.