The world has ended. No one knows why. When morning came, humanity had vanished. Only unidentified monsters roam the streets, and civilization has collapsed. There is no electricity, no law, no taxes. All that remains is hunger. —Fortunately. The monsters are edible. The taste varies wildly from one to another. Some taste like chicken, others like boiled tires. Grill them, or boil them. That is the most important question of each day.

In such a world, one man survived. He had lived on alone for years. And then, one day.

With that incredibly casual reasoning, he carried out a summoning from another world. A blinding light. A magic circle appearing at your feet. And the one who was summoned was—