The dance-pop single "Fly-By" was released in March 2023, serving as a standalone digital single. It was promoted in Japan as part of their Japanese activities.
- "Fly-By" was released as a digital single on March 15, 2023.
- The single was released by WAKEONE.
- The song is categorized under dance-pop and pop genres.
Kep1er is a nine-member K-pop group formed through the 2021 Mnet survival show *Girls Planet 999*. They debuted in January 2022 with the EP *First Impact*.
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