Written and illustrated by Taka Amano

Find out why Mototaro became a librarian and what secret purpose has been motivating him to continue after all these years. Then follow Kiichi as he heads off to the Water Depository on his own. He's determined not to put his friends at risk, but Hana's equally set upon not being left behind. When they get there, the identity of the depository's sole occupant turns out to be quite a surprise.