Here's a master track of "In the Harmony". The scene takes place at the GIC (Gender Identity Center). It's the finale of the show and the moment where April and Carl embrace and kiss in the real world, albeit under hypnosis. After the therapy session, April confesses to Carl that she's actually Mary from online and he becomes angry and storms off. April laments to the audience while Denise and Mark try to confort her.
The actors are Tony Domenick, Blake Nawa'a, Jessica Sotwick and Brandon Bill. There are a lot of different parts so you might want to download the Sheet Music for "In the Harmony" to follow along.