The narrator introduces us to the protagonist, a girl named shiorikitahara, who is obsessed with her brother. She tells us that she doesn't particularly like him, but that she wants to make him homesick for home. She asks her sister, nii-sama, to come with her to her house and cook for her. She's worried that one of the other members of the club will steal her stuff, but she's not worried about that. She wants to know what her sister struggles with, and she asks if she can swim, shiori-chan, or something else. She also asks if her sister has any sexual problems, and he replies that she does. The narrator then tells us about a wild policeman who came looking for her, and how he's been having a lot of fun at the pool. The protagonist tells her that if she ever gets lonely, she can call on her sister.