Question: Splendid Politics, is a 2015 South Korean television series, stars included in the film is which  South Korean actor and singer, who is a member of which group ?
Sentence (from "Seo Kang-joon"): He gained recognition with his role in the television series "Cheese in the Trap" (2016) and has since starred in "Entourage" (2016), and will headline KBS2's "Are You Human Too?
Relevant evidence: No