"Maybe! Next time we have a fancy costume party," Gen grinned.

He saw that yawn, Senku. Gen said, "I am seriously considering for you to invent futons when we're back. We've been getting by without a fridge or freezer, but I've been loving a good mattress, my back will be said without it."

Making light of things, of course, ignoring as always how dire things were for the Senku he left in his time.