Kikaiji Kake no Jakitsukai

is a Japanese light novel series written by Kouhei Kadono, with illustrations by Kouji Ogata. The series began publication on April 10, 2004 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
I'm 17 years old and I'm the emperor. But I don't feel like I'm great at all. Every day I get jerky with my beautiful and gentle fiancé, Princess Yui. Tradition and obligations are so heavy that I can't find what I want to do ... I longed for Lourdes Viper, a beautiful warrior of unknown gender who once fought against the whole world. However, that childish longing will eventually develop into a turmoil that shakes everything in the world-when the fall of destruction and collapse opens in the illusionary world governed by strange physical laws called the verse civilization. The young emperor is forced to make a decision ... The gorgeous demon, the relentless machine, and the swaying boys and girls' hearts are intertwined like a poisonous snake, which is the end of a random dream story.