[Machine Translation] Professor Mitani of Japanese history visited our laboratory in Takatsuki with a checkerboard doll. After posting a photo of the doll on his blog, he was contacted by the grandson of the doll's original owner. He said that the doll was thrown away by his mother, who was disgusted with the doll because its hair grew long and it started moving on its own. Takatsuki, who smelled the scent of something strange, was happy to investigate...? In addition, there is a special extra chapter full of the charms of the characters, including Sasakura and Takatsuki's holiday and a sad episode with Naoya's pet dog!