In the past, though Man created Dust to survive, the giants of Grimm rose up, threatening to return humans to nothingness. However, Man then created the Mobile Suit, ensuring Man's place in the world. Now, a girl and her Mobile Suit are about to enter a prestigious academy for Hunters. Her dream to become a Mobile Hunter begins now... Crossover between RWBY and Gundam in general.

There are those who do not know the full history that they are a culmination of. A society that has been made to forget the past is now introduced to a new product of history. For three children, their world will seem to crumble around them. For the invaders, however, it is a bloody reunion with a long-dead golden age.