The episode looks back as Ayano and her family takes in Tsubomi, KÅsuke, and Shüya, helping them to control their powers. Ayano acted like a big sister to her companions, staying strong even after her mother was lost in a landslide. One day, Ayano discovered some notes written by mother, researching an old folk tale that appears to hold the origin of the children's powers. Later on, following the school festival, Ayano realised from reading her mother's notes that Kenjirö also possessed powers of his own, an alleged 'snake' that had its own will, asking Shüya to help her investigate...