Sirius, Peter, and Lily overhear James and Remus talking about signing up for gigs and mentioning that they need people if they want more than one gig. The three go to the gig that the two have and pitch their idea to them. This'll probably be schist since I thought of it in the car. (Curses a bit) Disclaimer: I DO NOT OWN ANY CHARACTES UNLESS SAID OTHERWISE. THEY ALL BELONG TO J.K. ROWLING (unfortunately).
5 parts