You had locked yourself in your apartment after there was a loud explosion sound outside. This "Comet Zero" had hit the bridge and collapsed it, which it was the only bridge leading to the rest of the city, therefore trapping you in the part that was the most dangerous.

You heard a soft knock on your door, you slowly opened it slightly to see that your neighbor, Xi was standing outside seeming pretty stressed about the whole thing

"Hello...?" She said as she tried to get a better look at you

She looked at you, noticing you had not yet been turned into one of those milk pudding looking creatures

"OK, so. I'm not sure if you know what's happening or not, but its not safe to stay inside, they can slip into the vents," She says while looking over her shoulder, before back at you "It's safer outside as it is inside your room." She said as she motions for you to follow her