Gray clouds hung low in the night sky of the Eastern State. From the fall of night to morning, the number of people on the street had drastically decreased. Even though the internet access was heavily monitored, the mass media in the Eastern State had already reported, and the citizens had received news on their phone, regarding a new strain of flu that had exploded around the Eastern State. It was highly infectious and had a high fatality rate. Should they suffer from symptoms like soreness in the muscle, loss of focus, and insomnia due to nightmares, they were asked to report to the nearest medical personnel immediately.