After defeating Boros and his army, Saitama returned to his normal life in Z-City. However, despite this, the number of monsters is still increasing, putting a strain on the Hero Association's resources. The association's leaders decide to recruit hoodlums to help with their battle against these monsters. During the first meeting with potential newcomers, Garou appears, claiming to be a monster and attacking the crowd mercilessly. He turns out to be Silverfang's best former disciple and is driven by unknown motives. Despite his fearsome appearance, Garou seems unstoppable. Saitama becomes intrigued by this new enemy and decides to join the martial arts competition that has just begun. As the tournament progresses and Garou continues his rampage, a new great threat emerges, threatening the entire human world. This could finally be the catastrophe predicted by Madame Shibabawa.
The anime season adapts chapters 38 through 84 of the manga.
Saitama is the most powerful hero alive. Having apparently trained himself to superhuman condition, Saitama faces an existential crisis as he is now too powerful to gain any thrill from his heroic dee...
Genos is a young adult cyborg who serves as Saitama's disciple and strives for continuous improvement in his strength and dedication to justice. As a registered Superhero, he ranks 14th in the S-Class...
Nyan is a Dragon-level Mysterious Being and an executive member of the Monster Association....
Maiko Plasma is one of the two Monster Association monsters assigned to attack D-City....
Junior Centipede is a Mysterious Being that attacks Narinki and his son Waganma....
The 170,000-year Magicicada Larva easily overpowered Darkness Blade, a beginner B-Class Superhero with a rank of 61. Despite his efforts, he was swiftly vanquished and returned to Shelter Number 7....
Marshall Gorilla is a Monster Association monster that is assigned to attack W-City....
Zenko is similar in determination to her brother but opposes violence. She values caring for and safeguarding her sibling. Furthermore, she exhibits bravery by venturing into a city affected by monste...
The Phoenix Man is a secretive figure who emerges alongside Elder Centipede during the assault on S-City, working together with him as part of the Monster Association....
Hamukichi is a Martial Artist and user of the Sunflower Dojos Gentle Self Defense. He ran a dojo to teach women and children self-defense....
The "Organization" developed a machine god named Demon, who was tasked with destroying King for the purpose of collecting battle data and increasing his power. Doctor Stench created him. Although not ...
Tanktop Vegetarian is the A-Class Rank 9 professional hero of the Hero Association. He is second in command in the Tank Topper Army....
Eyesight was a Demon-level Mysterious Beings that attacked Y-City during the Monster Raid. Eyesight was a member of the Monster Association....
Bomb is Bangs older brother as well as a dojo master. He and Bang are the two greatest masters of the Martial Arts world....
Tanktop Tiger is a C-Class superhero who ranks 6th on the list of heroes. He's younger than his brother, Tanktop Black Hole, but shares some similarities with him in terms of physical appearance. Tank...
Narinki is a high-raking executive and one of the primary sponsor of the Hero Association....
Heavy Tank Loincloth is the A-Class professional hero for the Hero Association....
Venus Mantrap is a Mysterious Being that attacks Narinki, the sponsor of the Hero Association with Junior Centipede....
Gun Gun is a B-Class professional hero for the Hero Association with a Western-theme outfit and specializes in dual revolvers....
The AI in charge of repairing and enhancing Genos requested information about the cyborg responsible for destroying Genos's hometown. After Genos pleaded with him, he asked the doctor to transform him...
Elder Centipede was a Dragon-level Mysterious Being and an executive member of the Monster Association....
Face Ripper is a Demon-level mysterious being and a member of the Monster Association....
Awakened Cockroach is a demon level Mysterious Beings and a member of the Monster Association....
The Monster King, known as Orochi or Lord Orochi, heads up the Monster Association and serves as a major adversary in the Human Monster Saga series....
The individual known as Sneck holds the rank of A-Class Superhero at number 38 on the National Superhero Registry Test. His task was to greet new heroes participating in this test, alongside Saitama a...
Suiryu is a martial artist and user of the Void Fist. He is said to be a top contender in the Super Fight tournament....
Bofoy is an S-Class superhero ranked 6th in the Heroes Association and resides in Z-City. Despite his confident demeanor, he has never fully revealed his true appearance as only parts of his face have...
The Armored Gorilla is a mutant that was created by Dr. Genus from the House of Evolution. Unlike other members of its species, it has a mostly robotic body which makes it one of the strongest in the ...
Golden Ball is an A-Class Superhero, rank 29. He was partnered with Spring Mustache to investigate the Kombu Infinity rumor in Z-City....
Bakuzan is a Martial Artist and user of the Dark Hell Assassination. He was said to be a top contender in the martial arts tournament....
Similar to other heroes with tanktop motifs such as Tanktop Tiger and Tanktop Black Hole, Tanktop Master is a muscular man who wears a tanktop and has short hair. Unlike his counterparts, no specific ...
Haragiri is a swordmaster and a member of the Council of Swordmasters, before deciding to join the Monster Association....
Sonic is an adversary who initially served as Zeniru's guardian. He considers Saitama his eternal rival and views their confrontations with great importance. Despite having a slender physique, Sonic p...
A worker in the Hero Association. He oversees operations and gives intel to heroes....
Mumen Rider, a C-Class Superhero from Z-City, holds the #1 rank in this class. Despite his youthful appearance, he stands at an average height and weight. His armor suit features light-colored panels ...
Gouketsu was a Dragon-level Mysterious Being and an executive member of the Monster Association. He is the primary antagonist of the Super Fight Arc....
Gale Wind, who hails from the same Ninja Village as Speed-o-Sound Sonic and Flashy Flash, is a ninja from the 37th graduating class like Hellfire Flame. He joined the Monster Association some time ago...
Hellfire Flame is a ninja partner of Gale Wind who both came from the 37th Graduation Class "Golden" of The Village . In the past, they joined the Monster Association to become stronger....
Gyoro Gyoro is an important figure in the Monster Association, serving as both a monster and military advisor. As Orochi's closest advisor, he plays a significant role in the plot of the Human Monster...
Charanko has messy, light-colored hair and wears a white gi. He also boasts a muscular frame, although this is hardly indicative of his strength, or lack thereof. Charanko is a loudmouthed braggart, ...
In the martial arts competition, Zakos explains the rules to Saitama. Despite losing in their match, Zakos is embarrassed by his defeat. He refuses to turn into a monster like Saitama's opponents and ...
The Monster Princess Super S is a dominant female monster from the Monster Association with a whip that can make enemies become love slaves. Although she manages to control the Blizzard Bunch, Blizzar...
The watchdog-man is a youthful individual who stands at an average stature. His demeanor appears to be disengaged and indifferent, as he dons a complete canine attire that covers his body except for t...
Metal Bat resembles a typical Japanese delinquent with a pompadour hairstyle and hot-tempered eyes. He has great confidence in himself and is willing to handle any threat, regardless of its level - de...
Atomic Samurai is a character with long, black hair tied in a topknot style. His facial features include sunken cheeks, a defined jawline, and a small goatee. He wears a hooded cloak with an atom symb...
The student who trained under Bang's school was considered the top disciple until he became violent towards his classmates, causing severe injuries that left some permanently disabled. As a result, he...
Tatsumaki is a highly skilled superhero who ranks second among the S-Class heroes. She has a youthful appearance with emerald green eyes and curly hair. Her attire consists of a formfitting black dres...
Amai Mask, the most renowned hero of Class A, has gained worldwide recognition as the top hero. Although he possesses immense power and strength, which would have qualified him for S-Class, he chooses...
The Child Emperor is a young boy with large eyes who wears a T-shirt with two buttons that are both buttoned and carries a black school bag on his back. Despite being a genius, he values education and...
Bang is an S-Class hero ranked 3rd in the Heroes Association, residing in Z-City. He inherited his family's dojo and specializes in Rock-Smashing Water Stream Fist combat style. Despite being older wi...
The King, who belongs to the S-Class rank 7 of the Heroes Association, has been recognized as the world's strongest man after defeating a demon class villain with ease. Despite not engaging in actual ...
This individual was taken into custody for charges related to sexual assault against men. Puri-Puri Prisoner, a flamboyant superhero known for his interest in attractive male heroes and criminals, is ...
Superalloy Blackluster is described as being tall, muscular, and having a defined jawline. He has round eyes and large, well-defined pectoral and abdominal muscles. The description also mentions that ...
Fubuki leads Blizzard Group, a B-Class superhero team, and is Tatsumaki's younger sister. She holds the top rank in her group. Fubuki is described as tall, beautiful with shoulder-length black hair. H...
Pig God appears as a very obese man with several layers of fat. He is shown holding a hamburger in one hand and eating it during the meeting....
The character named Shining Flash possesses female characteristics, such as his sharp eyes and long, silver hair that falls to his shoulders. His attire includes a white cape adorned with a black pin ...
The young man has messy black hair, piercing red eyes, sparse eyebrows, and a pallid skin tone. He sports an old, unbuttoned trench coat over a black T-shirt....