In this Equestria, major conflicts are solved through rap battles. Unfortunately, the Mane 6 are not well equipped to deal with rap battles. Luckily, two ponies appeared out of nowhere and one of them just happens to be an up and coming rapper. Going by the names Boyfriend and Girlfriend, they say they're not from Equestria, but some place called Earth. They also say they're not ponies, despite being such in Equestria. Stuck with seemingly no way back home or as their original species, they must now make a living in Equestria. Not that this will be easy, given the amount of problems Boyfriend will have to solve through rap battles.
A Friday Night Funkin' crossover in an Equestria not quite like canon.