GAMERA: Rebirth - Code Tersos

A billion years ago, there was a super-ancient civilization. The ancient civilization which possessed high technology became instinct due to a terrifying plan led by a genius scientist. How did the man grew up to be someone to destroy the world? A spin-off manga which explains the birth of KAIJUs in "GAMERA -Rebirth-."
Enjoy the battles of fearful KAIJUs!

(Source: BookWalker)