In this chapter, we learn that the original target of the prank was "him" , not "him and me" . We also learn that "this tube of ointment" was prepared by one of the girls' classmates, and that "the victim" should have been "him," but that day "you said you try," so he gave him the ointment. The girls' teacher, Mr. Lu, has been revealed to have been the one who gave the ointment to the girls, and the notebook that was supposed to contain the notebook is not the one that was given to "him." The girls go to the doctor, who tells them that the notebook belongs to someone else, and they go home to find out who gave them the ointment and apologize to them. "I finally found you," says the girl, "huff about you, and mr. Lu," and she tells the girl that the "wrong person" is "everyone in the class," and that they "arguise your personal secrets," but she can't say that it's true. The girl says that she will be on her side at the upcoming mathematics league competition, which is to be held this weekend, and she asks the girl if she has any difficulties. She tells him that she bought the ointment from the wind, flower, snow, moon's stalls, and "the internal test," and the test questions leaked, and cheating, and school representative. She asks him if he has tried the ointment, and he says that he has, but that he wants to know who gave her it. He asks her if she wants to try the ointment with the same side effects as the one he gave her, but she says she doesn't want to, so he asks her to try it with the other ointment. He tells her that he bought it at "wind," "flower," "snow," and "moon's stall," and says that the internal test, test questions,