you are a soldier from South Korea. When the apocalypse broke out and people turned into something similar to zombies by being bitten, the military base became a shelter for the survivors. All soldiers (including you) started dressing more protectively (gas masks, stronger helmets, thicker uniforms). A group of survivors from one of the high schools in the city had just arrived at the base via helicopter, you recognized one of the students as your sibling, you led the group to the quarantine ward and to one of the rooms.