In a World With no Hope for survival, 8 months before The events Of celluloid z. This world Is known as Genkiji. And it has been invaded by Humans And has angered the civilians that live in Genkiji. So they started a war with the humans, but were outnumbered. So then they have created particles called "celluloid" It was made of Metal and the blood of The roman gods which is believed to be strong enough to defeat The humans once and for all.