Following a long period of battling monstrous kaiju, a newfound era of peace and abundance dawns upon the world. Despite their absence, the kaiju's influence lingers as certain girls are born with kaiju souls, granting them exceptional kaiju powers. Enter GIRLS, an organization dedicated to gathering these kaiju girls to safeguard the planet. However, a sinister group known as BLACK STARS emerges, comprising malevolent kaiju girls, and they have recently enlisted a hesitant new member into their fold, setting the stage for impending conflict.