Kep1er is a South Korean girl group formed by Play M Entertainment in 2021. They were formed through the survival show "Girls Planet 999" produced by Mnet. Their name represents the astronomical term "Kepler", which means the discovery of a new star. The group debuted with the single album "First Impact" and is known for their energetic and youthful image. Kep1er consists of talented vocalists and dancers who showcase their skills through their music and performances.