Hitoshi Iwaaki

A plague of alien parasites has invaded Earth, taken over human hosts and begun feasting on humanity. Most of the hosts are oblivious to their captors, but high schooler Shinichi is fighting to control his own body against an alien parasite and wondering how he can warn humanity before it is too late.

"Aliens parasites have invaded Earth and taken over the minds of ordinary people. Shin has been infected with a parasite, but he still can think and act for himself. Now he?s been approached by two mysterious victims of the invasion: Tamiya, a beautiful schoolteacher, and Shimada, another student. What do the aliens want with humanity ... and with Shin?"--WorldCat