On a Starry Night

~5 Seconds of Summer AU~
Four girls. Four boys. Two bands. One destructive contest. Naturally, one can assume the people in these bands are either friends or enemies, in which if you chose the latter you would be correct. These boys and girls were friends, maybe at a point in time, but their bands tore apart any friendship they had with each other at any point. All they had left was their bands, but they let their rivalry ruin their bands. After the Battle of the Bands is ruined for both bands, they need to team up to seek revenge on one band in particular. You'll find people starting to get along on a starry night.