In ancient times there was life on earth, mechanical membership was very developed.
But one day a magical 'match betrayed men and brought serious descent.
To cope with these dangers from disasters, animals and magical drives. Survivor builds a new sanctuary "City of OS."
A hundred years later, the researchers discovered that the mystery of the tragedy is hidden only in ruins.
At this crucial moment, the leaders of the were-acting system accidentally disappeared when the ruins were found.
Be careful, the situation between the operating system and the enemy is accelerating, the war is near.