I think that this picture/scene is one of the most underdiscussed ones to exist here.
Iirc it's after "Times New Roman" and it might be a bit ambiguous, if what happenes after it is real (spending time with Ayane on the rooftop like some apocalyse survivors).
But if it does mean something, who's the girl on the left?
My idea would be, in descending order (because i don't know who has what bust):
Maya (prime)
Ami
Ayane
For Maya it would mean that she never "popped" but was abducted and cleansed of her memory turning her into "Nu Maya".
Could even mean that "Nu Maya" is just pretending to not remember. Though, Himawari and the scarf speak against that.
Ami might make sense because she is likely the one who staged everything.
Ayane, she's a wild card in my eyes. And i don't emember her wearing the bell neclace/choker, like Maya.
I just think that one day, we might find out that Ayane knows more than she lets on.