This is a completely original My Hero Academia Arc, occurring sometime after the Paranormal Liberation War. This happens right after Izuku leaves U.A. U.A. faces a split and internal conflict, "The Civil War".  Students like Bakugo stand for complete freedom over what heroes do to stop villains, while students like Shoto attempt to take a logical standpoint and support strengthening laws regarding heroes in Japan. This leads to a huge fight, and a total U.A. collapse/civil war.