Question: What country's social system is commented on is the K-horror film series that began with "Whispering Corridor's"?
Sentence (from "A Blood Pledge"): A Blood Pledge (Hangul: 여고괴담 5: 동반자살 ; RR: "Yeogogoedam 5: dongbandjasal " ; also known as Whispering Corridors 5: A Blood Pledge and Suicide Pact) is a K-Horror film, and the fifth installment of the "Whispering Corridors" series of South Korean horror films set in girls' high schools that began with 1998's film of the same name.
Relevant evidence: Yes