I only know of the one airship! They've fallen out of fashion since planes were invented.

[Which he should probably explain, but... How is he supposed to explain planes... He's not a rocket scientist!]

Yes, exactly! [Atsushi smiles, relieved.] Even if they're asleep now, they could wake up at any time. I've seen it happen before!

[... With the one person he rather wouldn't have had wake up, but. That's scientific proof that it's possible, isn't it?!]