An unknown camp (azur lane/ac crossover) male reader x azur lane

We follow a class of three ships, of unknown origin, unknown identity. They're all unknown. Azur lane and red axis combined fleet has been getting increasingly larger amounts of reports of gruesome mass killings of sirens, not knowing what they might be dealing with, they send out patrols in every sea and ocean in the world to track them down. During the 3 years of seeking, no trace, no clue, no info has been found in 3 years.