Walzer no Monshou

is a Japanese light novel series written by Shin Araki, with illustrations by Makoto Sajima. The series began publication on February 10, 1994 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
1000 years ago, the fierce battle between "God" and "Genie" destroyed human civilization.  and  disappeared, but monsters roamed on the ground, and the surviving people lived a simple life in the barrier. One day, a girl came over the barrier ... Boy Rag meets a girl and longs for the world outside the barrier. And he knows his destiny lurking in his own blood. In the outside world, there was a flock of "demon beasts" that boasted far more power than humankind and whose sole purpose was to defeat their opponents. A shocking violence fantasy, a must-read, depicting the battle of a boy struck in it.