Episodes 1 12 of the anime series based on the manga by hitoshi iwaaki when a species of alien invades earth and takes over humans bodies by crawling into their ears and inhabiting their brains headphone adorned teenager shinichi izumi voice of nobunaga shimazaki escapes the same fate but doesnt get away completely unharmed unable to access his victims ear the alien decides instead to set up camp in shinichis hand realising that there is no way for the creature to die without also ki