Set in a post-apocalyptic world in which a lone human survivor, a girl named Haruka, lives with a family of five robots.

A two volume light novel series, written by Mizuhito Akiyama, was also published in Japan 1998 and 1999 by MediaWorks under their Dengeki Bunko label.

There is also a constant danger of roving war machines and threats like water depletion, yet despite all this, life is still in quite good shape.

Written by Hideo Kato and illustrated by Tomomasa Takuma, Kurogane Communication was serialized in Dengeki Daioh in 1997.

A two volume light novel adaptation, written by Mizuhito Akiyama, was published in Japan on October 10, 1998, and March 10, 1999 by MediaWorks under their Dengeki Bunko label.