My second nature

When Earth was on her last legs, mutilated by mankind, humanity discovered a new world. When turning sixteen years old, the age of converging into adulthood, humankind would gain the ability of transfering between Earth and the so called new world "Adhyll". Since this new world is not habitable by humans, they are to be reborn in this world through the samsara of this cosmos. It's seen as the fate of mankind to conquer Adhyll and escape the shackles of the now perishing world, although this may not be so easy as it seems.