Duty After School Episode 3

Hee-rak and Tae-man having a minor feast at the convenience store while other students hide or run for their lives. As Hee-rack and Tae-man are about to leave the convenience store they see a sphere but cluelessly start to play with it. The anxiety this scene gives! Soon they realize they are in trouble and start running around the store fighting the sphere. Finally, Hee-rak locks the sphere in the freezer where it starts dying.