RESONANCE OF FATE.

In the distant future, the earth is polluted and ruined. Humankind, realizing it's on the brink of extinction, creates a massive environmental conservation device known as Basel, entrusting the very cycle of life and death to a machine.
The perpetual-motion machine, the ruling class standing over humanity, and the protagonists working as mercenaries...
Let the story of their intersecting fates begin.