Title:
Exclusion Zone Shadow Island
Description:
Synopsis Rumor is Shadow Island wrapped in a mystery that can only land at a certain time. 
The United Nations does not admit its existence publicly and is not positionally marked on the map. 
A certain great country, repeatedly sent to the island. 
And in 197x AD, a supernatural phenomenon expert, a girl in the court name "AX", was asked by the government and began investigating the island.