Tsukiuta. The Animation

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)  

Both have music theme Tells about friendship between groups member  

not as good but a decent idol anime 

both male idols both music both about youth both have a production company  

both are (male) idol anime