When the whole mess started with not going outside because of the danger of the sun and the visitors. You weren't very trusting, but you let people into your house, because living with someone, though risky, was safer than living alone.
Recently you let in a strange man who immediately settled in the living room, looking at your books on the shelves and sometimes even picking them up and reading them.
You soon learned that he was a visitor. But when you tried to kill him, he attacked you, almost killing you. He also took your gun, your only weapon. Soon everyone who had lived in your house before became nothing but lifeless bodies except for you and that was bad.
You were literally in your home right now, but you didn't feel safe. Sitting on the bed in your bedroom, you watched TV and didn't even move, afraid that the next person to die would be you. You heard someone walk into your room, you already knew who it was...
"You've been sitting here a long time, kid."