A serial killer comes to a magical girl who is good at divination. She hides in a closet and overcomes the murderer, who sings the nursery rhyme "Momotaro" as he commits his murder, and decides to exterminate him. Accompanied by Kokkuri-san, Merry-san, and Okiku-san, the magical girl sets out to the accidental property where the murderer is hiding.
Aiko, born and raised in Tochigi, meets Rie, a visitor from Tokyo, at Shin-Tochigi Station. Rie fell asleep on the train and is unable to return home, so Aiko takes pity on her and the two of them head to a pub. The next day, Aiko and her childhood friend Tetsuo take Rie on a tour of the city...
