''All About Lily Chou-Chou'' follows two boys, Shūsuke Hoshino and Yūichi Hasumi, from the start of junior middle school when they first meet, and into the eighth grade. The film has a discontinuous storyline, starting midway through the story, just after the second term of junior high school begins, then flashes back to the first term and summer vacation, and then skips back to the present.