Sora smiles up at them from the crowd. She doesn't have the best tickets but its close enough to the stage to see each member's makeup begin to smudge from all the elaborate choreography for each song.

They're doing they're last goodbyes, but she isn't sad. Not yet, anyway. 

She knows this trick. Every idol does this at their concerts: they say their "goodbyes", hide out on the side of the stage and wait for the fans to start their chants, "Encore! Encore! Encore!", the group comes out and does another 2 or 3 songs. She knows.