The story shifts back to the bookstore where Sumireko Ogawa works and introduces another strange “curiosity” related to books and stories.
In this episode, Sumireko and Ren Adashino investigate a phenomenon involving a mysterious book/urban story that affects the people who encounter it. As they look into the origin of the story and how it spreads, they realize the case is tied to someone’s personal memories and emotions, which is often how curiosities in their world are born. The episode mainly focuses on setting up the next arc, showing how the new phenomenon begins and hinting that it may become another dangerous supernatural incident if they don’t uncover its rules quickly.