Past Acquaintance

The city of Arturia has been changed entirely. 

A month was given to the world. In that month, overt and covert schemes are used against each other.

And in that one month Arturia changes from a free port city for pirate to one of the most heavily fortified fortress in the entire Ten Seas.

There is no such fortress in any of the other nine seas.

There are tens of thousands of island in the four direction of the city. Each island acts like a water current obstacles, magical properties embedded into it. 

And even if you somehow managed to sail through the uncertain current and crazy waves around the island to reach to Arturia, that is not the end

There is a gate standing on four direction of the island city.

Each gate is titanic and heavy and sturdy. The North Gate, the South Gate, The West Gate and the East Gate.