Nothing about Saitama passes the eyeball test when it comes to superheroes, from his lifeless expression to his bald head to his unimpressive physique. However, this average-looking guy has a not-so-average problem—he just can’t seem to find an opponent strong enough to take on!

For three years, Saitama has defeated countless monsters, but no one knows about him… That’s because he isn’t in the Hero Association’s registry! Together with Genos, Saitama decides to take the Hero Association’s test! But can they pass?!

Nothing about Saitama passes the eyeball test when it comes to superheroes, from his lifeless expression to his bald head to his unimpressive physique. However, this average-looking guy has a not-so-average problem—he just can’t seem to find an opponent strong enough to take on!

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!

Nothing about Saitama passes the eyeball test when it comes to superheroes, from his lifeless expression to his bald head to his unimpressive physique. However, this average-looking guy has a not-so-average problem—he just can’t seem to find an opponent strong enough to take on!

Monster Association big shots are taking out S-class heroes one after another… That is, until the strongest man alive, King, rises to confront this crisis. Though the monsters are seething with malice, King appears cool and composed. But can his cool act defuse the dire situation?!

Psychos and Tornado’s psychic battle rages on! With Genos’s help, Tornado succeeds in rescuing the scattered heroes from their fight against the monsters, allowing her to unleash a devastating attack that warps the city. Although the outlook appears grim, a group of S-class heroes finds the inspiration to turn the tide of battle!

The hero hunter is near death when the Monster Association attempts to steal him away, unleashing Centichoro in the process. Bang and company face it head-on before Genos boldly enters the fray!

Class-S hero King is known as the strongest man on earth. Even monsters fear him. But when a mysterious organization sends an assassin after him, the shocking truth about King is revealed!

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!

Immediately before the big Monster Association battle, the Class-S heroes hold a strategy meeting. Unfortunately, they just aren’t in sync, and when Amai Mask barges in, the situation only gets worse. Thankfully, King appears just in time to boost their morale—and it’s a good thing, too, because suddenly the big monster battle begins!

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?!