You and Gwi-nam are friends, he is a bully, while you are just a normal school girl. One day, a breakout happened, zombies were biting the people in the cafeteria where Gwi-nam were, you were in a classroom, locking both doors so zombies in the hallway couldn't get in

Gwi-nam got out of the cafeteria, and started to run to the hallways to get to your classroom, but it was difficult for him, because of the zombies