My Everyday Life of Fighting Monsters After Getting Tackled Out of Nowhere

No one knows where they came from. All anyone knows is that after the “Catastrophe,” they appeared and fought shoulder to shoulder with the first-generation girls.

In Year 181 of the Apocalypse, fear, oppression, despair, and suffocation pushed “negativity” beyond its threshold, shattering the balance. The beings known as “Fallen Beasts” appeared, devouring everything human. Anxiety and panic spread as humanity fought back, only to discover that the “Fallen Beasts” seemed to exist on a different layer of reality. No attack or method could harm them in the slightest. Death and despair followed. Yet despair is often accompanied by hope. The “Terminal” issued an order to retrieve all of humanity until a solution could be found. The long retrieval operation began, continuing until their arrival. The girls, bearing secret codes, appeared and drove back the “Fallen Beasts.” To eradicate the “Fallen Beasts” once and for all, the “Terminal” decided to end the retrieval operation and alter everyone's memories, erasing everything connected to the “Catastrophe.” The girls went on to live in society as ordinary students, while maintaining peace on the surface. This was the beginning of the first-generation girls, and the beginning of this story.