The flat 建物 side folds into a チューブ that seems to spell zero, though the two sides of the チューブ never quite meet, so the 円 is never quite closed. The チューブ stretches, bringing a tube-surface local zero quite near to us...
29:11
The flat building side folds into a tube that seems to spell zero, though the two sides of the tube never quite meet, so the circle is never quite closed. The tube stretches, bringing a tube-surface local zero quite near to us...