The story of the Onsen Musume project follows a group of 9 apprentice hot springs goddesses who are encouraged by their superior to form an idol group called SPRiNGS in order to promote the soothing properties of Japanese onsen.
The voice actor for Sukunahiko, the god of the hot springs and overseer of the Onsen Musume, has not yet been announced.
The cross-media project plans to include live concert performances at various Japanese hot springs, a web radio show, games, and anime.