Having just graduated, I stayed at my second brother's house with nothing to do, but one night I heard a call from him that he was going on an adventure again. Three days later, my second brother and I set out on the road to an unknown place. Along with us were my second brother's best friend and a strange child…
Dead city in the water, underground civilization...
As the exploration progresses, conspiracies emerge one after another. What is the truth? Who can I trust? ?
When the earth's past is restarted one by one, we finally reach the final ending...
Mission: Unity is strength