The Onsen Musume idol project features hot spring guardian deities who form an idol group.
The official Twitter account for Onsen Musume: Yunohana Collection, the smartphone game based on the Onsen Musume franchise, announced on Thursday that the game will end service on September 30.
The project also has a male counterpart project titled Onsen Ninja.
Source: Onsen Musume smartphone game’s Twitter account via Yaraon!