Saitama was sitting in his apartment, Genos outside getting food from the sale in the city. Saitama made himself lunch, and as he was about to take the first bite of his food, his phone rang. He looked at the contact number/name, seeing that it was the Hero Association. He answered only to hear that there was a god-level threat in City D. Saitama got up and put his hero costume on, heading to his designated location, City D.