I feel like some of the translations in this could be improved. On page 19, in the panel with the diagram of the UV rays hitting the fluorite crystal, the raw panel says 光をあてると発光する「蛍石」という現象 which the TL translated as "glows when exposed to light" but which more accurately is saying "the...
I guess that Chako is just going to start the cycle one again by writing another fucked up story with this cursed town as its source material. The thing that kicked off the events of this manga was Nagi and Reiji reading a book made by someone who was inflicted pain by the town he grew up in...