I have only read the first chapter, but i decided to drop it because in my eyes it didn't make sense to me.
The main issue i had was that in the descriptions of Blaue Rosen that i read, it said that a guy was supposed to be joining a girls band, but to me it just looks like it's a guy dressing like a girl to join a guys band. The art is good, but all of the "girls" just look like boys. Yeah, they're good looking, but more handsome than cute. This had potential to be a very interesting story, and in my opinion if you just change around some of the context you could make it so that it was a girl trying to join a boys band to sing with the one she loves (or throw in a twist and have it a boy dressing as a girl).
Regardless of anything, i cannot further read this because of the way the characters were depicted even though they don't match their gender the slightest.