Glass Pane is a burgundy unicorn who hates his life in Fillydelphia. So when he's fired from his job, he decides to move out of his dark town. He moves to the next town over which happens to be Ponyville. With Lyra acting as kind of a spy to make sure he isn't a menace to the town. He falls in love with Bonbon, but (at least at first) It is unrequited. He also has to adjust to the new, colorful lifestyle that the ponies in Ponyville live.

When your life is as dull a gray as the world that surrounds you, the mundanities can make it all seem meaningless. Sometimes all we need is a little color -- or six -- to reintroduce us to what truly makes life worth living.

*6-16-2017 Edit, added Rainbow Dash tag because it triggered knighty.*