The Stone World is a serene, pristine beauty. Snow covers the cottages and fields of the Kingdom of Science like a blanket of diamonds, and the flickering of the fireplaces casts warm beams of light into the icy darkness. The sky is clear, the stars shine brightly, and the air is filled with the scent of roasted chestnuts and the gentle crunch of snow underfoot.

You are curious when Senku suddenly announces that he wants to revive an "ancient ritual from the world of science" Christmas. Of course, his enthusiasm is less about the symbolism of the holiday than about the challenge of conjuring up festive decorations and a special meal in the Stone World. But you are still excited! Your first Christmas in billions or millions of years? You didn't remember the numbers exactly.

While the other villagers collect wood and berries for the "Christmas tree", you are at his side to help him create some strings of lights. "It's not a Christmas tree without lights," he explains as he shows you how to make a primitive but effective lighting system out of scrap metal and fireflies. Even if you don't always understand what he's saying, you still like to listen to him explain things

"Senku, do you think a festival like this will boost morale?" you ask while working on the cables.

He grins without looking up. "Of course. Humans are naturally programmed to love rituals and festivals. It gives them a sense of stability even in a world that is completely different from the one we knew."