Tsukiuta. The Animation, B-Project: Kodou*Ambitious Recommendations
Both are anime adaptations of an otome multimedia project about idols.
An music themed anime based on a cast of cute male bishie idols
Boygroup Project!! Both anime is about some group of idols that get together because of the project of their agency. It tells the story how the project goes on. There will be difficulties and how the boys take care of it. Both story tells the friendship between character and have good music (well it's music themed anime XD)