The narrator tells the audience that he's finally decided to "infiltrate" the Hasegawa family. He wants to introduce himself to his family, and he wants them to meet him if they're "okay with it" . He tells them that he and his friend, Fumiya, went to his hometown to check out the air and see if it's as clean as it looks. They're back in the city, and the narrator tells us that the air is "so clean" that he can't believe how clean it is. He also tells us about his sister, Riko, who's in high school, and how she looks like she's "so mature" , which makes him happy. He's also happy to see that the family is "quiet" and "not at all noisy," which makes the narrator wonder if he can "get along" with his family.