Yes, it's a flying vehicle from the outside world. True to its name, it excels in fighting.

There are different types of fighter planes. The Zero fighter plane is quite an old model, so it isn't strange for it to appear here.

So that means someone is controlling that thing.

What do you know, you just solved the incident.

? Why do you look so bitter?

It's just not making any sense.

Like I just said, the Zero is an old model. It shouldn't be in use anymore.

On top of that, a week's gone by since it appeared, and it's still flying, even though there's no fuel here for it...