Gaist Crusher

Gaimetal is a metal ore with high amounts of pure energy that gets discovered 50,000 meters underground in 2047, and people begin mining it all around the world. However, Gaist, metallic lifeforms whose bodies are entirely encrusted with Gaimetal, emerge in 2055 and begin attacking mankind. In response to their attacks, people set up GCG - Gaist Crusher Garrison, where Rekka, Hayato, Kurama, and S...