Nanohazard

is a Japanese light novel series written by Katsumi Handa, with illustrations by Ryuunosuke Yatsufura. The series began publication on March 10, 1999 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
Molecular machine (nanomachine) goes out of control! It is impossible to rescue the three Yuji who were left behind in the experimental facility !? The crystal / molecular machine of the latest science that enables the creation of all kinds of substances by rearranging the molecular arrangement is self. It falls out of control during the growth experiment. The only last command given to Nanomushi is "Grow". There is no way to stop the infinite number of nanoworms. All rescue attempts have failed, and the final moment when the nanoworms overflow to the outside is approaching. The lives of three and 30,000 people are weighed, and the countdown of radiation irradiation that sacrifices Yuji and others finally begins ... The definitive edition of the near future horror is finally here.