Here me out : Singer AU crowghost
Charles is the singer and guitarist of the band (Niko at the synthetiser, Crystal at the drums). Edwin would never go on the stage BUT he knows all the lyrics, and how to plays some of the songs. He is their manager, he stop the three idiots to be exploited.
Three or four town over, you have Monty, the sweetheart loves to sing, he does pop and a little of electro, he has a very sweet voice which blanket your ears with cotton... And his mother see the money in that. Esther is his manager. She isn't nice, don't let him rest between shows, stop him from eating because he needs to "stay thin and pretty for the looks", all in all, toxic.
The mystery band (Charles, Edwin, Niko, Crystal) and Black Bird (Monty's scene name, make it kitsch please) both go first part at the Cat King concert (He has Lady gaga energy, I want his scene outfits to be memorable). Monty strike conversation with Edwin, because they both know the lyrics of Mystery Band by heart. Monty thinks he is talking to a fan, not the manager.
When the other quit the stage, Monty congratulate them, and he sees how nice and kind Edwin treat them. He is surprise that Edwin don't push them more, to do "better". Anyway, Monty goes on the stage and the others stay to watch because they are curious. And Monty is a lover boy and he sings like an angel and Charles and Edwin (together for three years at this point) got a *crush* !
Monty go down the stage, but they don't even get the time to go to him, he is swarmed by Esther, who critizise and nickpick everything, he didn't sing strong enough. He mistepped on the third song, he got his hair tangled. Mystery band is not impressed and try to intervene, proposing Monty to go out with them tonight since that their first big stage for all of them. Pizza and music and stuff.
Monty don't get to say yes as Esther makes a comment about his weight, and tell him that he can't allow to fall behind other stars for some pizza. She then drags him away and that it.
They don't see each others again for weeks, Edwin and Charles still lightly obsessed with the bird boy. Starts there a chase, at concerts, venues and other events for the boys to meet again and again.
Monty looks more and more down, Edwin and Charles trying to get him away from Esther but she made Monty sign a contract... Monty's songs are sadder and sadder.
Still don't know how I'm getting Monty out of it, I just wanted musical AU...