ZYCA

In ancient times, there was vibrant on earth, the mechanical civilization was highly developed.
but one day, magic mech betray humans and bring a severe disaster.
To face these threats of disaster, beast and magic mech. survivors build up a new sanctuary “city of OS”.
After a hundred years, the researcher finds out the secret of disaster is just hide in the ruins.
At this crucial moment, the leader of OS was disappeared in an accident when exploring the ruins.
cause of it, the situation between OS and enemy become more intensified, the war is near.