The last of Humanity's space battleships, the Yamato, will once again protect its people. However, this time, they find themselves in a different universe, where they face a new enemy: the Sirens, Humanity's long-time foes. After countless defeats, the Sirens retreated to their home planet, allowing Humanity to rebuild and prosper. They became an interstellar civilization, colonizing countless planets with the help of the Sirens' abandoned technology. Peace finally reigned. But in 2199, the Sirens returned, stronger and more numerous than ever. The fate of Humanity now rests in the hands of the Azur Lane Space Force (ALSF), who will fight tooth and nail to prevent their extinction.

A commander, betrayed by his fellow commanders over jealousy. They called him a coward, a traitor to the rest after. But only they knew what they did. They killed him. But the betrayed commander sunk to the ocean floor, mental cubes with him. He sunk into a pirate ship, fusing with it and coming back from the brink. Now he wants revenge against those who wronged him. But he wishes to not hurt those he loves. So this popped into my head earlier. So I'm acting upon it. Don't know if it'll be good or not. I don't know what's with me having Azur lane and pirate mixed into one.

The North Union, or the North Parliament as they were sometimes called, had issues dealing with Sirens as they seemed to like targeting their homeland. A few months have passed and after a bizarre agreement the Russian shipgirls and their komandir no longer have to worry about this. The only other sensible thing to do is kick back and party, but as with all events where alcohol, especially vodka, is involved the komandir is going to be strapped in for one hell of a ride, especially so with a certain pair of light cruisers...