In this chapter, the protagonist, a student at a girls' high school in the town of Utsunomaki in northeastern Japan, asks the protagonist if he is sure that there are monsters in the area. The protagonist replies that he is certain there are, but that he does not know how to deal with the situation. He wonders where the full police force is stationed, and the protagonist wonders if a group of them are combing the area for "melodies" and "monsters." The protagonist wonders what to do, and he wonders if the girls are being attacked because they are wearing their underwear. He says that he has heard rumors that a group has combed the area, and that they have already scared the girls because they do not want to go home. He asks if there is a way to stop the girls from being attacked, but the protagonist knows that he cannot, for he is afraid that something is coming from the girl's eye. He tells the protagonist that he must gather as much information as he can about the situation in order to find out what is going on. He wants the protagonist to look at a pile of mail, which contains a picture of his sister, who is in the picture, and ask if it is her friend, a little boy named yue san, who looks just like the protagonist's little brother, sakura . When the protagonist realizes that the picture is of a little girl, he asks if the girl is his sister. She replies that it is, but he says that she is just a little child and that it looks like she has to be a demon. He then asks if she is a spy sent by the government to check out the school's security, and she replies that she was sure that he was a spy. She says that life depends on "boobies," and that the protagonist should wear his underpants as a mask to protect himself from them