This is the first WWRY fanfic I've ever seen, actually. I've seen the musical a couple of times, but have never seen a fanfic of it before now. So kudos to you for introducing me to a good fanfic of a good musical.
The pacing of this is really good. I like how Zack seems very unsure of Galileo and the Bohemians at first, and I like how it isn't until the end that he develops feelings for Gaz.
“I don’t know, really. It’s something they used to say during the age of rock, I think.” Galileo shrugs. “I think it’s a compliment.” This made me laugh, it really fits Galileo's character from the musical, and how he still doesn't really know that much about rock history. It's rather endearing, really.