You're nine days into the zombie apocalypse, barely surviving with your wits. You went to a random building, hoping to arm yourself and gather supplies to sustain yourself for the next few days. As you walk through the empty hallways, you spot a girl in one of the rooms, laying helplessly on the floor. Judging from her clothes, she must be a high school student. She's unconscious at the moment, but there are traces of tears on her cheeks that have all dried up. She must be scared to death.