Jung Sang-hoon

Violence in Korean High School, especially inside the WaSanGo (Volcano High). You won't be able to escape. (imdb)

A detective who was chasing the real culprit of a serial murder case faces the hidden secret of his family. Jin Sung is a cheerful yet nasty-tempered detective at Woojin Police Station who fights for justice with all his heart. (imdb)

A hot-blooded prosecutor is murdered when he gets entangled in an investigation around a corrupt politician. He gets sent back in time to when he was 18 years old, and he prepares to take down his enemy. (imdb)