Lunatic Moon

, is a Japanese light novel series written by Fujiwara Yu, with illustrations by Kaya Kuramoto. The series began publication on September 10, 2003 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
There was a boy in the slum under the mechanical city Babel. A boy who has no name, no mutation, and searches for the invisible "moon" in the sky. And there was a girl. As a weapon that has a mutation in the arm and fights against strange creatures to protect the "purebred" of humankind. Hundreds of years since the world was surrounded by "chaos". Under the patronage of the heritage of the previous era, "over-education," human beings managed people called "mutants" who were good at fighting, and lived in the devastated land in the shadow of strange creatures. However, when the boy and the girl meet, the world quietly begins to open the door to change ...