"Spelunking for leisure?" Senku asked, sounding almost incredulous. People had told him a lot of things were meant for fun one way or another, mostly his dad but that was not one of them. "I..." He didn't really understand that but he threw up his hands in a shrug. "Okay. Fine. Sure."

He gave a wry shake to his head. If they were there together, they may as well head in together, he figured.

"Hmm, the lack of equipment makes things a lot less useful to me, unfortunately. I don't presently have a project ongoing either, which means I'm sort of trying to plan for whatever idea I'll come up with later which is a bit of a challenge. I managed to accomplish most of my goals on this trip, after all, I made my tools."