In a world engulfed by the endless expanse of blue, the formation of Azur Lane marked the dawn of humanity's last stand. This coalition, forged by the major factions—Eagle Union, Royal Navy, Iron Blood, and Sakura Empire—stood united in the face of a terrifying adversary: Siren. These enigmatic entities, emerging without warning, carved a path of devastation across the oceans, threatening to erase the world as it once was.

Desperation fueled innovation, leading to the creation of KAN-SEN—Kinetics Artifactual Navy-Self-regulative En-lore Node—living embodiments of hope designed to turn the tide against the Sirens. These warships, imbued with human form and unparalleled combat prowess, became the vanguard of humanity's fight for survival. For the first time, the looming shadow of extinction began to wane.

Yet, amidst the chaos and uncertainty of war, a mysterious figure arose—a Commander, shrouded in secrecy. No one knew their true origin, nor the depths of their abilities. But one truth echoed across the factions: this Commander was humanity's last hope. With unwavering resolve, they led the KAN-SEN into battle, time and again defying the odds, and snatching victory from the jaws of despair.

This Commander was more than a strategist, more than a leader. They were a beacon of salvation, a symbol of defiance against the Sirens. In their hands rested the fate of the world, and with every battle won, they etched their legend deeper into the annals of history—a Savior, forged in the crucible of war.

This is the story of a sole Commander, where their life was turned around upon a certain unexplainable incident. The incident that will reveal every secret of the world and its surrounding about Siren.