Decisive killing + slow warming + lone wolf + all members' IQ online
Biological evolution, ideological enlightenment, technological explosion, intertwined rules, and strange characteristics. There are millions of corpses in the city, abnormal species are everywhere in the wilderness, powerful people are rampant in the survivors' gathering place, and the hypocrisy of the military keeps the people alive.
After being disappointed with many things, the protagonist begins his own journey to the end of the world...