For the Snark was a Boojum, you see.

Emergence Matrix

Miyako's dad takes her to Hirata for therapy and Miyako goes into her possessed state. On the way back to the shrine, the 4 boys, Miyako and her dad meet the Makoto's grandmother's handmaiden. She grabs Miyako and says that Miyako is the next miko. Miyako goes into a trance again and Makoto getting angry curses his grandmother. He runs back to his house and finds the grandmother dead.