(Multiple heroines, no formulaic tropes, no invincibility, no System, no mindless power fantasy. A blend of Gundam, Cthulhu, Evangelion, and Pacific Rim.)
In 2027, a stone stele appeared out of nowhere at Monte Cristo and exploded, triggering the First Impact. A tide of alien creatures swept across the globe, bringing human civilization to the brink of collapse. To withstand the catastrophe, countless underground cities were built, and specialized armor for women became the most dazzling symbol of the post-apocalyptic world. When Underground City B21 was unexpectedly launched to the surface, twenty GM girls, with an average age under twenty, held the line against the coming tide. Shedding their youthful innocence, they faced the flood of alien creatures with their flesh and blood, fulfilling their mission with armor and conviction as they fought desperately to preserve a chance of survival…
