The existence of numerous “other worlds” was confirmed long ago—

In an era where each world was being surveyed, researched, and managed, a new threat emerged.

–The name of that threat is Kaima.

They are monsters with the ability to travel the world and commit evil deeds for various purposes.

There is an organization called the Anti-World Demon Investigation and Countermeasures Bureau, which was created to counter such entities.

Fusou Kanade, who belongs to that group, is sent on her first mission to a world where orcs make up the majority of the population.

Having overcome the hardships of her training period, Kanade is filled with hope and motivation.

However, what awaited her was the vile desires of a male…