Ohhh thank you for post this question, I read a few chapters in 2010 but then I read something about the autor's death :c is a shame because she was very talented and young, well I thought it wasn't finished, but when I saw your question I searched and is finished and here! is a manhwa about a band http://www.mangago.me/read-manga/teen_spirit/
R. I. P. Kim Jea-Eun ┗( T﹏T )┛
I would like that is not true either, but is not :(
https://myanimelist.net/people/2482/Jea-Eun_Kim
http://www.mangago.me/read-manga/kanojo_no_honnou/mf/v01/c004/37/ anyone ??