“A Sepia-colored Promise with a Sleeping Girl: A Trick?”
“Nemuri no shōjo to Sepia iro no yakusoku Karakuri na” (眠りの少女とセピア色の約束 カラクリな)

Keitaro discovers a doll that can move on its own. Everyone is amazed by it but Keitaro and Mutsumi seem to be able to hear it talk also. Keitaro finds out from the doll that his great grandfather promised to fix its legs but never did and being the good guy he is, Keitaro decides to fulfill his ancestor’s promise… with the help of the girls, of course!