Project GB is an official initiative by Re:Library.

There were countless worlds, but almost none of them ever intersected. Still, while it was rare, it wasn’t impossible, at least not when it came to summoning from another world. And there was always a fractional chance, some infinitesimal percentage, that two worlds might draw physically close to one another. Even higher beings were not absolute. That was something Master Finis had once said.

If two worlds were to collide, would Master Finis and I be able to go there? As for me, Lullus, a former spirit, I had arrogantly assumed that I would not be able to go. That assumption persisted despite the precedent of Fumitsuki having once been summoned by mistake.

To state the conclusion, Master Finis herself couldn’t go. But we, her apostles, could. From this, we came to understand something troubling. That we were able to descend into a world from the moment its collapse became inevitable. In other words, if we could eliminate the cause before the collapse was finalized, the deadline, and maintain that state, then the world’s lifespan could be extended.

And that was how I ended up descending into a world alone. A world very close to the one where Master Finis and Fumitsuki were born. A world without magic, one governed solely by physical laws. A world where masses of iron traversed land, sea, and sky. A world reshaped by human hands to be more comfortable for humans to live in. A world without natural predators of humanity, a world that, on the surface, could be called peaceful.

That was what it had been. But as another world, an entirely different one, one where magic existed, drew near, everything changed. As the worlds began to intermingle, beings that could truly be called humanity’s natural enemies came into existence, the Calamities. At the same time, humans capable of wielding magic began to appear. Existing weapons still had their uses, but against the more powerful Calamities, they proved insufficient. Gradually, humans with magical power, Warriors, became the primary force fighting against the Calamities.

Technology, too, fused with magic. In some ways, daily life became more convenient. Yet the many people without power were forced to live in fear that a Calamity might appear at any moment.

That said, by the time I descended into this world, Calamities had already become just another part of daily life. Even those that appeared unpredictably could now be forecast to some degree, and civilian casualties, excluding cases of sheer recklessness, had become quite rare. In fact, for several months after my arrival, there were no major incidents at all.

But on the very day I finally secured a base in this world, a Calamity appeared. A powerful beast, later classified as an abnormal specimen, destroyed a human city. Of course, humans empowered by magic power fought it, but the Warriors who were able to reach the scene quickly were wiped out. It would take several hours for the country’s strongest Warrior to arrive, and this Calamity was expected to become the worst disaster yet ever since the first appearance of the Calamities… or so I was told. Because I ended up defeating it myself, the absolute worst was avoided, though not without considerable damage.

And that was when I became known to the people of this world.

“If you’d acted sooner, my sister wouldn’t have died.”

As a result of being recognized, people like him began to force their way to my base. A man who had come countless times already, a Warrior whose name I didn’t even know. Apparently, he hadn’t originally been a Warrior, but awakened after being affected by the Calamity I had slain.

“I see.”

Dealing with him was tedious, so I gave a noncommittal reply. I’d heard it all many times before. I used to respond differently, but conversations with someone who clearly just wanted to blame me had grown unbearably tiresome, so I stopped bothering with proper answers. I did consider simply erasing him. But the national defense agency that oversaw the Warriors asked me not to, so I left him alone. That, too, was because they had promised to deal with him promptly.

And so, angered by my casual response, he was quickly escorted away by agency personnel, then sent off to exterminate Calamities across the country.

“Lady Lulu, we sincerely apologize.”
“As long as you adhere to the contract, I won’t interfere.”
“That’s a relief to hear. Then—”

A female staff member, different from the one escorting the man away, approached and spoke to me. Lulu was my name in this world. I had no intention of telling them my real name, and after answering carelessly once, the name, Lulu, stuck.

After I defeated the abnormal specimen, the national defense agency contacted me, and we entered into a contract. At that time, I made several things clear. That I was not a being of this world, that I had no intention of ruling or altering it, and that I did not intend to help it.

In exchange for keeping various nuisances, including the media, at a distance, I agreed to eliminate any Calamities that might threaten the base I had constructed. That base, located deep in a forest, something Master Finis would probably call a log house, was my only concern.

As an apostle of Master Finis, who was herself a god of contracts, I would not break an agreement once made. However, that contract contained no clauses concerning the collision of worlds.

“That’s something the people of this world will have to deal with themselves. I won’t help.”
“I see.”
“Then please take care of him.”
“Understood. We’ll make sure he understands.”

She left after that, but he would probably come again. After all, he was an important asset to the national defense agency. He was far from the strongest in the world at present, but it was said that he would become so someday. His motivation was simple: the annihilation of the Calamities that killed his family. From the agency’s perspective, he was an important and convenient weapon.

It seems he had grievances toward me for not saving his family and for refusing to leave my base. He came here to vent his anger. The agency, in turn, turned a blind eye to it, allowing him to blow off steam. That was how it was. What humans choose to do was none of my concern, so I left them to it.