The story is set in a parallel Japan very similar to the modern Japan we known today. Increasing income divide, creeping environmental pollution, unsolvable garbage problems, childcare waiting lists being disputed while those directly involved aren't present, repeated cases of corruption... Japan's government, entrenched in its own vested interests, can do nothing about the abundant problems and discontent throughout the land. Now, at long last, idols are taking a stand to rescue a nation with no way out! The Heroine Party, the Sunlight Party, the Starlight Party, the Bishoujo Party, the Wakaba Party, the Subculture New Party, and the SOS Party: idols from these seven idol political parties who have become Diet members representing each prefecture will crash through the sense of stagnation that surrounds Japan with their song and dance! They will bring back the people's smiles and envelop Japan in their shining aura!

[Source: Crunchyroll]