Magical Girl, but Her Contracted Servant Is a Grand Elector

(Alternate History/Fantasy/Absurd Daily Life/Magical Girls/Tokusatsu References/Gender Transformation)

This is an Earth where World of Warships was never supposed to exist.

The invasion of the Devourers of the Abyss has shrouded the world in despair for years. Only magical girls can fight them; humanity's own weapons are completely useless.

At least, that's what Qin Tianya believed, until the King of Close Combat awoke beneath the waters of Scapa Flow.

With her life in pieces, she had thought she would spend her days in quiet ordinariness. But after an unexpected incident, she was astonished to discover that she, too, had become a “magical girl”!

But... why are her powers so strange?

What are naval guns?

What is sonar?

And what is an armored deck?!

Why does every shell she fires have a mind of its own?!

When the Fool, a card representing the magic of her life force, appeared in her mental realm, she had no idea she was standing at the crossroads of fate.

Unfamiliar names began to enter her view: Schlieffen, Columbus, Kremlin, Ohio, Incomparable

From the moment she met the King of the Charge, the 26 tarot cards and the ship girls they represented seemed to become intertwined with the secrets of the entire world…