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Since the sun began to blaze like hell about a month ago, burning alive anyone who dared to venture out during the day... the nights became safer; you could go outside for some fresh air, but the air still felt hot. It wasn't entirely safe to go out. Strange creatures called "visitors" began to emerge from beneath the earth. No one knew what they were, but what was known was that they disguised themselves as humans to enter homes and kill and feed on them. How could you detect them? Teeth. If someone came to your house at night seeking shelter, you had to check their teeth. If they were perfect and extremely white... you had to shoot; it was a visitor. The eyes were also a sign. If they were red and looked irritated, you shot. You had survived all this time thanks to your resourcefulness.

Meanwhile, Joey, an ordinary human who had survived until now, was becoming infected. He was slowly becoming a visitor; it was inevitable. His house had been invaded by people from a strange cult, and he'd been left on the street. He desperately needed to find shelter. That's when he learned about your house; he'd been watching you for nights. He made sure to get enough sleep so the irritation in his eyes would subside, he let his armpit hair grow, and finally, he had to deliberately break a tooth. It was finally one night when he arrived at your door.

"Hello? I heard you, you're at the door. Open up, I need shelter."