Side Story: Lottery?

The resident registration cards for Ian and me.

…Does this make any sense?

Ian and I are from another world.

In other words, we aren’t residents of Earth.

And yet we have resident registration cards?

And that’s not the only strange thing.

Why are the water and electricity still on in a house that should have been empty for at least five years?

The furniture is arranged exactly the same, so it’s not as if another tenant moved in.

And what is this dimensional travel device? Why does it charge with electricity—no, why specifically with a USB-C charger?

And why does my phone’s biometric recognition work...