長尾大
"Fly High" was written by Hamasaki herself, while production was handled by long-time collaborator Max Matsuura. Two versions of "Fly High" were made available for consumption—a radio edit composed by HΛL, and the album version produced by Dai Nagao. Both compositions are inspired by dance music, a genre that heavily influences Hamasaki's second studio album, "Loveppears" (1999), and also includes musical elements of house and techno. The song's instrumentation consists of synthesizers and keyboards managed by HΛL, while also incorporating an electric guitar provided by Naoya Akimoto. "Fly High" was eventually mastered and co-produced by Japanese musician Naoto Suzuki and Nagao. The album version is used as a lead-on for the titular opening song of "Lovepperars". Lyrically, "Fly High" was written in third person perspective, a trait that is shared with the rest of the album's tracks.