Classroom of the Elite - The Apocalypse

The end of the world. Just as Kiyotaka came back to White Room after graduating from ANHS, strangeness befall to the whole world. Out of nowhere, the 'thing' they called Infected spread among humans at incredibly speed. They wandered aimlessly, and once they see living creatures, they'll chase them forever. No one knows what the main cause of this strangeness, but those who bitten by 'em will undoubtedly became their kinds. Every country, no exception, just barely hold themselves by these 'things'. White Room can show such a fierce fights, but only for a while. Every living creatures could be Infected by these 'things', that include animals. And I, Ayanokouji Kiyotaka, escaped again from that place since I know it won't hold long. Even so, the outside world was no better than the future of that place. Lone in the mountain, I ventured for search of settlements with Infecteds loitering around the forest.