"Would you like to make a contract?"
When eldritch horrors known as the Anathema began tearing through reality to invade Earth, aliens calling themselves the Zenith stepped in to protect humanity. Individuals were chosen and gifted with the ability to use magic and advanced technologies to combat the existential threat. Over twenty-one years later, the so-called "Magical Guardians" are still hard at work keeping the peace. With their flashy outfits, superhuman abilities, and reality-defying spells, they are the part-time heroes and full-time idols of modern society.
But none of that really matters to Maito, whose biggest problems are dealing with his family, classmates, and the ever growing dread of his imminent future.
As far as Maito is concerned, mundane problems are more than enough to worry about, and the idea of magic and monsters might as well be nothing more than daydreams. At least, they were until he finds himself in the middle of an Anathema invasion, desperately trying to survive with someone he scarcely knows.
Please be aware this story contains intense violence, gore, traumatic situations, and other potentially unsettling content.
This is a Genderswap Magical Boy fanfiction of Magical Girl Gunslinger by Mikasane.