"Coupe Deville" is about what the DeVille twins are up to when summer ends, and they start 5th grade.
Plot[]
Phil and Lil have always loved eachother since birth because they are twins, but when Lil is invited to her first party that actually isn't a birthday party, Phil worries because Lil is growing up faster than him. Meanwhile, Lil tries to keep away from "immature" Phil, and begins thinking more about herself than Phil. Her mother Betty is so happy to see her daughter growing into parties, but knows Phil has a side, too. But after Lil goes to a party and gets teased about her looks, she begins to realize how snobby she had been, and apologizes to Phil, who she had not thought about for a while.