Fanfiction Without Title

This is a crossover with Eureka and Pentatonix (but Pentatonix wasn't in the list of topics!) In this story, 4/5 of Pentatonix were in Eureka when they were kids because they are musical geniuses. Avi isn't in it, but who cares about him? Just kidding! (I'm not the best at writing and this is my first fan fiction ever. The ending is really rushed.)