I believe I do have a timeline of events that you might find enlightening.
Midnight & Noone perform their song The Fellow with the Cello.
Gally sings the part of “the fellow on the cello”, while Susanna sings as “Susanna on piano” (pronounced “pian-ah”). The two characters are in love with each other, but both are under the impression that the other does not love them.
Vanessa is acting as stage manager for them.