commenting ^ cause I wanna know too.
something like given?
Yes!
Uhm well dark heaven. It isn't really what you're looking for, but its pretty good..
If you are okay with yaoi
http://www.mangago.zone/read-manga/yoru_to_asa_no_uta/
http://www.mangago.zone/read-manga/yoru_to_asa_no_uta_ec/ (sequel)
The band isn't the focus of the story but Whispering you a love song is a nice (GL) one
K-on has a band in it but there is not like any romance or anything you can also watch the anime on netflix
http://www.mangago.zone/read-manga/k_on/
I want a manga (any kind) about a band or something like that please. Thank you! ^^-