I read the first chapter of a recent manga, but now I can't remember what it's called. I don't remember the whole story but: it starts with some girls looking a CD display at a music store for a very popular band. One of the members of the band quit just before the band's big debut (apparently he doesn't want to be famous and have his face plastered everywhere) but he still writes the songs for the band and is thought to be a genius. The manga switches to the band, who goes to pick up this song writer on the roof of a building in a helicopter.

That's all I can remember. Thanks in advance for the help.

I am not sure but is this the manga?

Kanojo wa Uso wo Aishisugiteru

No, that's not it. I hadn't gotten very far into it, but I think the girl in it (the song writer's future love interest) was a normal (probably high school) girl.

...That's definitely it.
You may want to DL it and be sure.
Because I'm absolutely certain that's the manga you're looking for.
The summary in MU doesn't describe it fully and well enough...
The main girl is a normal high school girl.

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♪MONSTARR~ will eat all your cookies and steal your bishies~♪ Φ_Φ

Ah...yeah...you're right, that was the one I was looking for. Sorry! I reread the summary and recognized the name of the band, then downloaded it to be sure. And, yep, that's what I was looking for.

Thanks! (To both of you!)