The world's top assassin, "Night Falcon," was betrayed and killed during a mission. When she opened her eyes again, she had become a petite high school girl at Tokyo Metropolitan Sakura High School.
To make matters worse, the mysterious System in her mind announced in a chilling voice:
Welcome to your new life as a magical girl. Save the world.
Night Falcon stared at the transformation item and the eye-searingly pink battle gear, falling silent. She had only ever been good at infiltration, assassination, interrogation, and eliminating targets. Now she had to fight head-on against calamity beasts that devoured negative emotions, dressed in a magical girl's battle outfit.
To uncover the truth behind her death in her previous life, the System's true purpose, and whether her rebirth was simply part of some grand chess game, she decides to carry out her missions on the surface while secretly investigating in the opposite direction. But as a calamity nest in the old town, the injured senior magical girl Hoshino Hikaru, and the mysterious transfer student Kirishima Rei appear one after another, Night Falcon gradually realizes that "saving the world" may have been a lie from the very beginning.
