[ to be honest, it had taken tsurumaru almost the entire span of the years spent as a part of the imperial collection to fully wrap his mind around the idea of electricity, which to this day still seems a bit magical for being able to make so many things happen with seemingly so little effort and in a way that he can't see with his own eyes.

so kaoru's assessment of tsurumaru's tech-savvyness is well-placed, shown by the way tsurumaru all but lights up at the thought of this place being the origins of things like lights and movies and automatic doors (which he spent like thirty minutes playing with until cleaning robots politely escorted him into the movie theatre proper). this means tsurumaru is not so much a sardine in this can as he is a deep-sea angler fish, the kind that glows, has an appetite for the curious, and whose appearance should only elicit unpleasant nightmares. that is to say, he's suddenly invading kaoru's personal space again, rest in peace protective bubble, and you can practically hear sparkles pinging off the walls of the tunnel like shooting stars. ]

Those cables once powered those fun doors? And these cables are further down the tunnel? Goodness, you must show me where they are.

[ and equally as casually, in his sparkly-existence sort of way: ] If you do, I won't even ask how you came to know about this tunnel's existence, let alone so well.