If you're looking for manga similar to The iDOLM@STER: Cinderella Girls Second Series, you might like these titles.
Mana Nagase is a high school girl from Hoshimi City who loves to sing. One live performance leads her to become a top idol and she starts to shine.
To-Y (Fujii To-ii) is a member of the punk rock band GASP. Along with other punk bands, which usually just hanged out doing small gigs, they have this enormous hatred and aversion to the main Japanese music industry, which is dominated by pop music and untalented Idol singers. However, To-Y was tempted by Kado (the Nagel ripoff) of Kama Production, a strong will promoter, to expand out beyond GASP since he has the talent, except she also expect to promote him as an Idol singer, which revolts To-Y.
The "idol-training produce game" takes place at a private boys' idol-training school with a history of turning out many great talents in show business. The protagonist is the school's lone female student who transfers to the school because of a special situation, and enters the school's producer department.
Follows Beit and The Kogado as they audition for parts in a stage musical set in the Heian era. Six hopefuls, three parts. Who will emerge victorious?