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.

連続殺人犯が占いの得意な魔法少女のもとにやって来る。童謡“桃太郎”を歌いながら凶行に走る殺人犯を、押し入れに隠れてやり過ごした彼女は、犯人の退治を決意する。こっくりさん、メリーさん、お菊さんをお供に、魔法少女は殺人犯が潜む事故物件に乗りこむ。