As a Magical Girl, I Am Responsible for Killing All Enemies!

After the civilization was rebuilt, disaster beasts were raging, and humans could only rely on the base city to pass on the legacy. Fortunately, an extraordinary power called magical girls came into being, building a line of defense with magical power and giving people a chance to breathe. Good news: She was reincarnated, gained the ability to be immune to some negative conditions, and successfully embarked on the path of a magical girl. Bad news: Civilization is teetering on the edge and is about to end. Fortunately, there was someone tall enough to hold her up when the sky fell. The girl chose to step into the public gate, one step at a time, climbing up the stairs, and she was so high-spirited. Until the end of civilization came, facing an invincible enemy, Lorraine suddenly realized: "What does it mean that the sky is falling and the taller one is holding it, and then I am the tallest?" (Female protagonist, not married)