Okay. There's this fic I read 2 years ago and i can't remember which one was it.

1. It was about Super junior

2. Probably eunhae or kyumin

3. There  was this scene that they were in an awards show in china, hangeng performed before suju. They sang 'A Day' sand the song was cut, and then somebody gave hangeng a mic and was invited to the stage snd then they sang 'a day' all over agan. 

Please help me if you have any idea whatic this is. Thank you.