One ordinary day in the future, change began. An energy source was suddenly developed, and people began to indulge in revelry. After the joy, 13 cities quietly emerged, leaving behind 13 terrifying pits and countless ordinary people···

One ordinary day in the future, change began. An energy source was suddenly developed, and people began to indulge in revelry. After the joy, 13 cities quietly emerged, leaving behind 13 terrifying pits and countless ordinary people···