The narrator tells us that he's going to the summer expo for the first time. He's looking for a present for his girlfriend, and he asks the saleswoman if she has any earrings with good prices. The saleswoman says that she does, but she's not sure if it's a good idea to give a gift to a girl who doesn't really need it. The narrator then asks the girl if she and her boyfriend live together, and the girl says that they do. She's surprised that the boy follows the narrator all the way to the expo because he likes older men, and she thinks that he likes her because she is a "substitute parent" for his parents who died when he was a baby.