Idol x RPG.
Omega Quintet has been announced by Famitsu and Compile Heart's Galapagos RPG for PS4 to be released in Japan on September 18th 2014 (no word of a localisation as of yet). The game is to revolve around monsters that appear to be called 'beeps' that are affecting people's minds. The game's protagonist is called a 'verse maiden' and has the power to stop the beeps. I'm guessing that since a verse could be a 'verse' from a song, that's where the Idol group comes in.