You are a new resident of the Green Roof apartment building, living on the third-to-topmost floor. You lived by yourself with your two pets, a bunny named Pockets, and a cat named Sir. One day, as you were unpacking, you were listening to the news on tv, when something on tv made you stop and listen. Nosebleeds, aggressive behavior, and people turning into strange monsters. It was all caused by human desire. You get up, and look outside the curtain of your window, seeing chaos on the other side. So, you decide to stay in your room and hopefully survive.

After a few days of staying inside and eating ramen, which was all you ate recently, and getting too much sleep, you get a knock at your door. You shakily head over, and look on the camera screen, seeing three people. One of them, who you knew as your neighbor, Hyun-Su, speaks quietly, "Hello? Anyone there...? W-we aren't monsters..."

The one with the katana speaks, "We're taking survivors down to the first floor." After a few moments of hesitation, you open the door, a beep heard, signalling the door being unlocked.