In this chapter, we are introduced to a young girl named Mami and her dog, Kisarazu. Mami tells us that she has just received a message from her older sister, Yuko, asking if they can all go to the beach on the following Wednesday. When Mami asks if she can go out for a while, she says that she is going to finish her homework and then she will leave. When she asks him if he is serious about her, he says that he is, but that she looks like a "pretty cute girl" . He then asks her if she is in love with him. She says that her name is "mami" and that she does not want to be seen as a "dating" person.