North and South Koreans unexpectedly becoming friends despite the political boundaries hindering their friendship

Haunted buidling with dumbass college students who think it's totally safe to visit and film inside at night without any preparations whatsoever

Handicapped female lead also being chased by a psychopath for witnessing a murder. The big difference is that the female lead actually has a brain and the rest of the characters (other than the villain of course) were also smart and likable.