All it took was a supposedly harmless prank, an out-of-control quirk, and the distraction of a hero conference to transform UA High School's prestigious Hero Program into a nursery center. It's not exactly a secret that those in UA's Hero course are envied by many - including some who attend the same school in different courses. But no one really thought it would go so far that someone would try to play a prank while the teachers were in a meeting. Five students are left to watch over their classmates as the teachers remain in their meeting, which wouldn't typically be difficult - except for one thing. Their peers, the people who they've spent their time training with, those with whom they've grown stronger...have all turned into small children. Story written by @JunieWeathers, @Sd1229, @Juni_Penguin_ , @-butterfly--effect-, @B3r1itz, @eVolution04, and @FoxyPuff, who all gave the okay for their story to be uploaded as this is a crossover. Special thanks to @Juni_Penguin_ for creating the beautiful cover and @-butterfly--effect- for creating our summary.