Having remembered seeing a monster in an accident she was in when she was in first grade, Nanaka realizes that the world connected to the gate of the Gogyo Shopping Street is the Taisho era. Meanwhile, Mao begins investigating the "headless incident," which seems to be related to the cat demon that cursed him.

Nanaka and Otsuya infiltrate the Shōrin Sect, which seems to be connected to the Cat Demon. In the basement, they find a manuscript of sorcery, but it does not contain any instructions on how to manipulate people's lifespans. Then, the sect's leader, Shōko, locks the two of them in the basement.