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.

Teen life is full of mysteries and problems, so a socially challenged, nerdy computer whiz and his best friend set out to create the 'perfect woman.' Like a computer-generated fairy godmother, the duo's heavenly creation guides the pair through the pleasures and pitfalls of teenage life.