<Korean TV Series NOW> ”Undercover High School” EP7, Seo Kang Joon's team collaborates with Jin Ki Joo = Viewership rating 6.8%, Synopsis/Spoiler
※This article contains spoilers. In EP7 of the MBCTV series "Undercover High School" (viewership rating: 6.8%), Hye-sung begins to track down the truth behind the third ghost story.