Duty After School EP 4 : Become the Villian

The first vehicle gets attacked by a sphere and turned over. The soldier dies on the spot, and So-yeon gets badly injured. The students decide to leave the vehicle and find a shelter nearby. Soon, they find a construction site office where they can hide and rest. However, their peace doesn't last long. Meanwhile, Lieutenant Lee goes against the order and steals a vehicle to rescue the students.