The inconceivably powerful Lord Boros has traveled untold distances in search of someone who can cure his boredom: Saitama! With the fate of humanity in the balance, will the two champions at last find in each other the worthy opponent they’ve been searching for?

As a colossal spaceship floats in the skies above City A, a member of its monstrous crew battles on the ground against a group of S Class heroes. Despite their powers, they can’t seem to finish it off. Meanwhile, Saitama has boarded the enemy ship on his own.

As the battle with the Deep Sea King reaches its climax, more heroes fall to the aquatic despot’s brutal attacks. Which of them has what it takes to be a true hero?

Silverfang and Bomb catch up with Garou while the hero hunter is battling Genos, starting a whirlwind battle that draws in more and more combatants as it marches towards its hair-raising climax!

Garou, out hunting heroes, can barely contain his excitement when he gets the chance to battle the S Class hero Tank-top Master. Meanwhile, Silverfang shutters his dojo to begin his own hunt of his former disciple.

As the Super Fight tournament heads for its grand finale, the Class S heroes battle to hold back the tide of monster incursions. Meanwhile, Atomic Samurai is setting in motion a plan of his own.

Saitama and Genos glean information about The House of Evolution and its founder Dr. Genus, a scientist with dangerous ideas on artificial human evolution. Meanwhile, Dr. Genus learns of Saitama’s amazing strength and has plans of his own for One-Punch Man.

Garou is at last surrounded by multiple heroes and forced to fight, even though he’s covered in wounds and nearly at his limit. The hero hunter still has his incredible ability to read opponents’ fighting styles, but there are surprises in store for all.

Saitama tags along to an emergency meeting of Class S heroes and discovers that a seer has foretold a serious danger threatening the Earth. Though the crisis could occur anytime in the next six months, the heroes are surprised to hear the roar of explosions that very hour!

A monster is moving toward City Z, one that has been created by the mysterious organization known as The House of Evolution. Genos, a young cyborg, attempts to stop it, but gets in over his head before Saitama happens along.

An enormous meteor hurtles toward City Z, forcing the Hero Association to ask its S Class heroes to respond. When all their efforts prove in vain, Genos decides it’s up to him to protect the home of his master and stop the meteor, no matter what the cost.

Class-S heroes plan the Monster Association assault, but Amai Mask arrives and clashes with them.

Zombieman faces Vampire, a descendant of a supernatural bloodline, in a brutal, deadly showdown.

Heroes arrive in Z City but face a monster ambush. A-class aids while Gyoro-Gyoro watches the fight.

Child Emperor rescues Waganma. The heroes take on threat-level Dragon monsters in a deadly fight.

The heroes battle monsters while Terrible Tornado faces Gyoro-Gyoro. Orochi appears before Saitama.

Garou fights Insect God and King the Ripper, while Tareo gets kidnapped. Dr. Kuseno visits Saitama.

The heroes prepare for battle without Silverfang and Genos. Garou attacks the Monster Association.

The heroes plan a rescue of a child kidnapped by monsters, while Garou awakens deep underground.

On his way to hunt heroes, Garou dines and dashes at a restaurant, but is chased by Saitama.

Child Emperor finds Waganma and faces Phoenix Man, using his ultimate weapon to protect him.

Tempest Wind and Hellfire Flame, who were ninjas but are now monsters, battle with Flashy Flash.