In this prosaic setting, an ordinary high school girl named Satsuki Hiraga longs to join the heroic Kaiju Girls organization “GIRLS”.
The story of Kaiju Girls Black is set in Soshigaya-okura, a small town that’s not as noisy as the city nor as quiet as the suburbs.
One day, she awakens to mysterious powers, but Satsuki instead finds herself recruited by Black Directive of the villainous organization, “BLACK STARS”.