Several young people from all walks of life were, through various incidents, forced to become Naturisers against their will.
Living in the same house in a strange mountain town, they fight off the forces of the menacing company empire - Crimson Stardust.
And yet, the other problems in their life - protecting their identity, overcoming their biggest flaws, tolerating each other in one household and resisting their very existence becoming commodified - might be even harder than fighting for their life...
Yume Iwasaki, the oldest daughter of a wealthy family of global megacorporation owners, decides to sneak out to see a mysterious nearby forest facility after her younger sister mentioned it to her.
What she ends up finding, as well as the traumatizing events that take place after, will irreversibly change the course of her life and force her to abandon everything and everyone she once knew.
Witness the story of Calia Gamma. The Naturisers' fight begins here!