She Is a Magical Girl and a Magical Girl Killer.

Magical girls are gifts from God. They have magical powers that violate the laws of physics and strange and diverse abilities. Although monsters have appeared since the birth of magical girls to disrupt the existing order of the world, everything is always developing in a good direction. But the monster is a lie. Man-made monsters, destined short lifespan and desires lurking in the dark... If one person's power alone can shake the world, then chaos will also be inevitable. Whether it's for their own selfish desires or for the sake of long-lost righteousness, magical girls have begun an era of fighting each other. Everyone is a murderer, and everyone is on the path they believe is right.