Vinyl, Octavia, and the other greatest musicians of Equestria are invited to Canterlot for the Festival of Music. There, the two friends meet Glimmer Note, a pop star (and one of Vinyl's idols). But you can only get so close to a pony before you start discovering secrets about them. Sometimes, horrible ones.

A self-drawn image, cleaned and colored by TheBobulator
Yes, the color scheme is based off of Luka's. I just happen to be a big fan of Vocaloid.