Life gets pretty boring when you can beat the snot out of any villain with just one punch.Hero hunter Gato intensifies his onslaught, so of course Saitama decides now is the perfect time to join a combat tournament. Meanwhile, Class-S hero Metal Bat takes an assignment guarding a Hero Association executive and his son, and before long trouble appears!Hero hunter Gato intensifies his onslaught, so of course Saitama decides now is the perfect time to join a combat tournament. Meanwhile, Class-S hero Metal Bat takes an assignment guarding a Hero Association executive and his son, and before long trouble appears!