This is story that Y/N and F/N got isekaid to a world full of shipgirls when they were seven. (A/N: I post when I feel i want to. Don't worry, it won't be like a week or something and the storylines is all from my imagination. All characters excluding God, Y/N and F/N is not mine. There will be romance)

After years of service in the Osea Airforce, our main character callsign "Trigger" finally retire from his service. Famous for his effort in the Lighthouse War, he earned the nickname "Three Strikes". But one day, fate would force him to fight another war by sending him to the unknown. I don't own Azur lane and Ace Combat 7: Skies Unknown. They belong to their respective owners.

Fortuitous love without sanity can have terrible consequences... Twenty years have passed since Azur Lane and Red Axis once again allied against the true enemy: the sirens. Seeking to improve their fight against them, nations have created combat divisions in different parts of the world to confront mermaids and provide support to Azur Lane. Under this scenario, a new and incipient division, sponsored by the four main nations, receives a new and misteryous commander, who will be immersed in various situations while trying to lead the curious fleet that was assigned to him. Story with some creative liberties, because this is my first fanfic. I will probably make corrections over time to improve it. Beforehand, the atmosphere of the story can get very dark, and the personalities of some ship girls may be a little altered. This, to help with the plot.

You were a German Scientist for the Iron Blood's and you are credited with invention of the -3 and V-4 rockets. You were successful until you were betrayed by the whole of the Iron Blood because of your inventions.

Y/N or I say BRP Gregorio Del Pilar patrol ship. Was patrolling in the west Philippine sea, the world is war with sirens. Most of the country are fighting the sirens, Y/N was patrolling and your captain saw sirens out of no where. They begin attack and sunk you, but somehow Y/N transferred to another world call azur lane. Will he survive this new world?

(this had 3 votes so this wins) XD humanity was threatened over a war with a race far beyond them,a race from another place,the Sirens,a race who sought the destruction of the world through the sea,they came and conquered most of humanities oceans to fight against such a threat,humanity created the shipgirls,warriors made to fight against the Sirens,born from the Wisdom Cube,that was found amidst the war with the Sirens with these new fighters,Humanity took back it's oceans and pushed the Sirens back to center of the Sea,far away from Humanity's shores with the passing years,the Sirens became more inactive as time passed by and with the lack of a common enemy,the world once again turned on itself,the nations and faction declared war on each other,splitting Azur Lane,the Navy who commanded the Shipgirls 2 sides of a war,factions split apart,allies now turned to enemies,plots of destruction unravel for both side while a 3rd enemy lurks within the shadows of the depths as they wait for their time to strike but,under amidst the entire war,a trump card within the Royal hands laid in wait to be played,a warrior beyond any person's knowledge or imagination,a fighter laying in dormant on the coasts of his nation the true Knight of the Sea,waits for his time to show,what it really means to have power

Archer was the Lone Wolf Pilot using the legendary demon lord F-15c Cipher. He doing the missions alone without any help, he complete a lot of missions alone, when he have another mission from the HQ. He on the Gerald Ford Nuclear Supercarrier. He's taking off and fly to eliminate enemy threat, but he found out the enemy was already detecting him. It was sirens who spotted him, when he was going drag to unknown portal. He try to flew away but he coundnt get out of the portal sucking him..... After he transported. He still flying and he open his eyes, he don't know where he was.......

Y/N or as known as Kriegsheld is the third ship of the Bismarck class. He is also the first ship boy. During a mission, he was betrayed by his own team mates. Y/N felt anger, betrayal and revenge in his heart. He also meet his little, loving angle in knight form on her patrol.

A boy wakes up in a lab with a woman telling him to get out as fast as possible, once he escapes to Japan he learns his place as the king of the ocean, a beast made of steel, the mighty Bismarck.

So now a child runs a navel base