Bio Defense ~A City Built in a World That Has Ended~

The world suddenly met its end. It appeared suddenly, attacking people who were living peaceful, everyday lives. It took up residence in the former daily lives of people, emitting a foul odor and presenting a hideous appearance. It spread from person to person, with infected people attacking those who were not yet infected, and the damage spread at an alarming rate. There is currently no way to counter it. Peaceful daily life quickly turned into an extraordinary world, and the remaining people gathered and formed several cities in Shikoku, seeking a way to strike back and trace the roots of the infection. However, the infected also evolved, making the difficult situation even worse. Furt...