The Strongest Man
Saitama is a guy who's a hero for fun. After saving a child from certain death, he decided to become a hero and trained hard for three years.
The Lone Cyborg
A monster is moving toward City Z, one that has been created by the mysterious organization known as The House of Evolution.
The Modern Ninja
A group of battlesuit-clad terrorists called "The Paradisers" appears in City F, and targets the fat-cat Zeniru, who in turn dispatches his bodyguard to defeat them.
The Ultimate Master
Though he's been doing the hero gig for three years, Saitama realizes that the public knows nothing about him. Determined to get a little recognition, he decides to become a pro hero.
The Ultimate Disciple
An enormous meteor hurtles toward City Z, forcing the Hero Association to ask its S Class heroes to respond.
The Deep Sea King
Saitama and Genos head to the shores of City J to stop a pack of monsters calling themselves the "Clan of the Seafolk".
As the battle with the Deep Sea King reaches its climax, more heroes fall to the aquatic despot's brutal attacks.