Spiritual Era: the Return of All Spirits

Ten thousand years ago, the source spirit came and human civilization was on the verge of destruction. In a desperate situation, humans took risks and made a contract with the source spirit, and the spirit master was born. After thousands of years of quelling the catastrophe, people founded the Federation, and the era of psychic technology came. But the cracks have never healed, and ruins and forbidden areas are full of crises. This is the Spiritual Era.