YEAHOOOO ..
Finally finish this one, i'm so sorry for the delay (not to mention the nob mixing since this is the first time i'm mixing for bunch people.)
thanks a lot to the awesome cast, that accepted my invitation. 
and i kinda exhange the harmony line between luna and krystal. and also split it to vl, *since i want to hear vl harmonization here. *selfish imagination..
and here's the individual comment : 
Nara (http://www.youtube.com/user/ChoiNaraLoVa) :
UNNIE, your krystal line is just superb, those clip, when i received it i'm kinda fangirling, and not to mention your krystal adlib, your krystal solo line, okaiii ilove all of it , just baiii. hope we can collab more in the future because i'm so loving youuu ~ :* 
VL (http://www.youtube.com/user/YBlvr) :
VL sorry if i told you i lost your line before and found it again.. i always love your voice, there's some characteristic that i can't point out, but just, just just your voice is awesome okaiii.. and your harmonization line too.. the amber part is just <3 <3 the best amber ever :* 
Hydeko (https://soundcloud.com/ekooochan)
KOKO ~ your voice, can i say i love your voice soooo much, those high notes, argh your line is perfect, all of it, and not to mention your first line, the perfect opening, bahhh i'll never get tired of your voice ever . *_* 
Me (http://www.youtube.com/user/Renluvsuju) :  
me by any meaning don't want to take luna part, but in the end here i am, i'm so sorry for the broken adlib, the screechy high notes, and sorry if i'm ruining this beautiful collab, so so so sorry ㅠㅠ *please don't kill mehh *run away 

Instrumental credit : youtube.com/angelofthewings
Harmonies : the cast .

Thanks a lot for listening  :*

[COLLAB] F(x) ft D.O - Goodbye Summer

umm..simply a girl who loves singing and music so much..:)

just a girl that love handsome oppa, cute things, and delicious food 

ciao X3

[COLLAB] F(x) ft D.O - Goodbye Summer

reneang_