Saitama always wants to be a hero beyond money and fame. After three years of special training, he has now gained ultimate powers. Saitama can beat enemies with just one punch and a clear win. He works at the Hero Association with his loyal student Genos.
One day, monsters of the Monster Association take a child hostage from one of the Hero Association’s leaders. All S-class heroes’ devices to rescue captives. While a human monster, Garou, is also kidnapped by monsters.
