Magnus Vall, AKA the carelessly renound American pro hero, Pushback. Making his untimely return to Japan to pay his respects to one of his former mentors, Sir Nighteye. Reminiscing the the old days as a transfer student. a familiar face is in need of a favor. Obligated to help, Magnus is tasked by All Might and the school board at UA to act as the substitute teacher for class 1A during Aizawa's suspicious mandatory leave of absence. While trying to keep his visit as breif as possible Magnus reluctantly accepts but only for the next two weeks. little does he know these passing weeks will be filled with many hardships. not just for his students but for himself as well. Magnus will have no choice but to face his past mistakes and a gruesomely powerful enemy... He's not the only one passing through Japan...