Six Gravity and Procellarum are two rival male idol groups who happen to live in the same dorm. Six Gravity is made up of young men who represent the months of December to May, while Procellarum's members represent June to November. Follow the daily lives of these twelve young men as they deal with the stresses of idol-hood, school, and living together.

Source: Funimation

AniDB | ANN | MAL | TVDB | Wiki (en)

Side story: TsukiPro the Animation
Sequel: Tsukiuta. The Animation 2