Director:
There was once a large-scale war called the "Calamity War". About 300 years passed after that war ended. The Earth's sphere has lost its previous governing body / and a new world is being built under a new governing system. A temporary peace came / and at the same time / the fire of a new war ignited in the Mars circle far away from the earth. The protagonist / the boy Mikazuki August / accepts the escort mission from the private security company Clyse Security Company (hereinafter referred to as CGS) to which he belongs / Kudelia Aanna Bernstein / a girl who plans to make the Mars city under the rule of the earth independent. However / CGS was attacked by the armed organization Gallallhorn / who was trying to steal the buds of rebellion / so they retreated after using children like Mikazuki as bait. The leader of the boys / Olga Itsuka / saw this as an opportunity and decided to rebel against the adults who abused her. Mikazuki / who was entrusted by Olga to repel Gallarhorn / challenged the enemy with the Gundam Barbatos / a mobile suit from the "Calamity War" era that was used as a CGS power reactor.
曾经有一场被称作“厄祭战”的大型战争。那场战争终结后过了大约300年。 地球圈失去了至今为止的统治机构，在新的支配体系下，新世界被构筑起来。一时的和平到来，与此同时，远离地球的火星圈燃起了新战争的火种。 主人公——少年三日月·奥古斯，从所属的民间警备公司克律塞安保公司（下称CGS）那里，接受了打算让在地球势力统治下的火星都市独立的少女库德莉亚·蓝那·伯恩斯坦的护卫任务。但，CGS受到摘取反叛之芽的
