The narrator thanks his older sister, Kisarazu, for helping him out with his homework. He says that he was glad that they were able to study together, because he would not have been able to do so if it weren't for her. The narrator says that while he was trying to solve a problem, he was being made to cum by daiki, and that he is the "absolute worst" . He feels that his nipples are getting wet, and his breasts are getting twitchy. He wants to go to the doctor, but he doesn't know what to do. The teacher, Mr. Kiryuu, tells him that he's sorry for making him come out today, when he didn't seem to be feeling well. Kiyuu says that she's beginning to think that the teacher scared her, but that she was feeling fine when she got to school. She says that even though she blames daiki for making her come out, she still feels that they can study together. The only problem, she says, is that she wants to be taught.