ONE
Saitama's easily taken out a number of monsters, including a crabby creature, a malicious mosquito girl and a muscly meathead. But his humdrum life takes a drastic turn when he meets Genos—a cyborg who wants to uncover the secret behind his strength!
Rated: T
An emergency summons gathers Class S heroes at headquarters...and Saitama tags along. There, they learn that the great seer Shibabawa left the following prophecy: "The Earth is in danger!" What in the world is going to happen?!
Rated: T
When aliens invade Earth, a group of Class-S heroes finally finds a way to fight back and go on the offensive. Inside the enemy mother ship, Saitama fights Boros. Faced with the alien's frightful power, he decides to get serious! What is the Earth's fate?!
Rated: T
Time bomb Garo, a monster admirer, finally explodes, attacking the Hero Association! Meanwhile, Miss Blizzard visits Saitama at his apartment. Because of his lower rank, she plans to make him one of her subordinates, but...
Rated: T
The Monster Association has kidnapped Tareo, the boy who admires Garo, and now Garo finds himself plunging headfirst and alone into the heart of the Monster Association's hideout. Meanwhile, the Hero Association pushes forward with its operation to rescue Waganma, while Genos and the others are living it up enjoying hot pot at Saitama's place! ..Rated:T
Garo has just left the Monster Association's hideout when he crosses paths with Saitama, who's in quite a pickle, but Saitama still doesn't know Garo is the Hero Hunter. Later, King the Ripper can no longer hold back his murderous urges and confronts Garo himself!
Rated: T
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!
Rated: T
Saitama is now a certified hero! And with that title comes great responsibility—he's required to perform one heroic deed per week. While Saitama makes the rounds to meet his quota, an incoming threat from outer space is screeching toward Earth...
Rated: T
To stop a Demon-level crisis, Saitama and company head toward the action. However, even Class-S heroes prove to be no match for the Deep Sea King! In order to protect the good citizens, our heroes will need to summon all of their courage and confront this threat!
Rated: T
As the fight against the Monster Association big shots heats up, Class-S heroes find themselves locked in a desperate struggle, but Tornado is closing in on Gyoro-Gyoro's main body! Meanwhile, Blackluster confronts Garo, while Saitama wanders the labyrinth where the Monster Association is hiding out....Rated:T
Psychos intends to fuse with Orochi, the Monster King, which would give them immense power against Tornado. Superalloy confronts Garo and experiences fear of his opponent's strength... Meanwhile, Saitama gets caught up in a cave-in in the Monster Association's underground labyrinth!...Rated:T
At the martial arts tournament, Suiryu of the Dark Body Art shows promise with his outstanding strength. But outside the stadium, a large number of monsters are pushing the heroes, even Genos, to their limits! Inside, unaware, Saitama approaches his match against Bakuzan!
Rated: T
Class-A heroes struggle in their fight against the giant monster Multieyed Octopus. Wait, is that Class-S hero Flashy Flash joining the fight?! Unfazed, the Monster Association continues ramping up its attacks, but its goal remains a mystery. Meanwhile, the martial arts tournament reaches the semifinals!
Rated: T
While Saitama's distracted at a martial arts tournament, Centichoro, a threat-level Dragon monster, attacks! Metal Bat engages it in battle but struggles against its gargantuan size. The monster knocks him into the distance and right into the path of hero-hunter Garo!
Rated: T
Surrounded by heroes, Garo finds himself in a tight spot. But despite the great numbers, he defeats the heroes one by one with his unmatched strength before Genos comes rushing in! Meanwhile, Saitama is reaching the height of irritation in his own battle...with King?!
Rated: T
Despite just finishing a martial arts tournament and immediately dealing with the Monster Association invasion, Saitama still proves to be so incredibly strong that he feels empty inside. King lectures him on how to live like a hero, but it doesn't help. Meanwhile, servants of the Monster Association close in on Speed-o'-Sound Sonic!
Rated: T