A war of two seas (Sea of Thieves x Azur Lane)

A world with two seas.

The first, Azur Lane. A sea where a military organization of the same name fights the traitorous Crimson Axis, who have allied themselves with Azur Lane's sworn enemies, the mysterious and sinister sirens. In this sea, technology determines the might of each side. Planes, Destroyers, Aircraft Carriers, Riggings, and such.

Then there is the second sea. The Sea of Thieves. A sea that is occupied by Pirates. The old fashioned kind. Wooden ships, flintlocks, cannons, and black flags. Unlike Azur Lane, The Sea of Thieves is not at war with itself. Rather, it is a place where pirates will be pirates.

Azur Lane and The Sea of Thieves generally leave each other alone, however, Pirate ships have been known to fire on Azur Lane and Crimson Axis, and it isn't uncommon for some Crimson Axis ships to come into The Sea of Thieves and attack Pirates to blow off some steam.

But one day, The Eagle Union The Royal Navy notices a Galleon sailing just off the coast of their island. Some of the ship girls are sent out to board it and interrogate the crew. However, instead of the bloodthirsty pirates they expected to find, they find pirates who will become their greatest allies.