Setting of the story.

In a Milky Way galaxy just like our own, there are two world's that though certain events will be joined together to fight an enemy.

One was an Earth that has been ravaged by war. Humanity was on the brink of extinction by an enemy known as the Siren's, a race of people that look from mass-produced ships to humanoid forms. Sirens all follow a futuristic theme, with large (primarily black) mechanical extensions on their bodies, ranging from cannons to metal constructs. Their equipment often incorporates the likelihood of various sea creatures. It is speculated that the Sirens may have been the true identity behind the many mythical "sea monster" sightings throughout human history.

As humanity was forced from the sea and their coastal cities, they were able to develop the Wisdom Cubes. These Cubes, filled with the hope and dreams of the last of humanity, where able to gain the last warships of humanity enough firepower to turn the tide in the war. These ship's where also able to gain humanoid form and are now referred to as Ship girls. To help the girls fight, the major counties help form Azur Lane; an Aliance to stop the Siren's invasion and return the seas to humanity.

With the help of four Human commander's, the ship girls start to make advances against the Siren's and peace is restored to the planet. However, the Siren's played tricks on the ship girls and forced the split of Azur Lane. Because the Human commander's where ambushed and knocked unconscious, the ship girls of the different factions fought against each other; all the while the Siren's got more powerful from the hatred and battles that the ship girls had. This Civil war was stopped by Enterprise, a carrier of Eagle Union and one of the most powerful ship girls on the planet. She was able to see through the Siren's lies and with the help of the commander's; stopped the fighting and used her power's stop the Siren's. while the major faction are now back into Azur Lane once more, there are still some bumps in the road. But with the help of Enterprise, Peace is slowly returning to their world.

on the other Earth, there are now sirens. But a war between the forces of the angles, devils, fallen angles and the other factions has been simmering for well over 200 thousand years. The main leaders of three faction; Angle, Devils, and Fallen Angles have been killed and a new generation of leaders are trying to find a way to end the hostilities between their factions and lead them into a new era. As they searched for a way, the answers to their problems would come by a very special occurrence. This is where the story beginnings.