The seemingly ordinary and unimpressive Saitama has a rather unique hobby: being a hero. In order to pursue his childhood dream, he trained relentlessly for three years—and lost all of his hair in the process. Now, Saitama is incredibly powerful, so much so that no enemy is able to defeat him in battle. In fact, all it takes to defeat evildoers with just one punch has led to an unexpected problem—he is no longer able to enjoy the thrill of battling and has become quite bored.
This all changes with the arrival of Genos, a 19-year-old cyborg, who wishes to be Saitama's disciple after seeing what he is capable of. Genos proposes that the two join the Hero Association in order to become certified heroes that will be recognized for their positive contributions to society, and Saitama, shocked that no one knows who he is, quickly agrees. And thus begins the story of One Punch Man, an action-comedy that follows an eccentric individual who longs to fight strong enemies that can hopefully give him the excitement he once felt and just maybe, he'll become popular in the process.
[Written by MAL Rewrite]+ More
More Seasons
Characters & Voice Actors

Genos
Main
Saitama
Main
All Back-Man
Supporting
Armored Gorilla
Supporting
Atomic Samurai
Supporting
Bang
Supporting
Battery Man
Supporting
Bearded Worker
Supporting
Beast King
Supporting
Bespectacled Worker
SupportingRecommended for you
Special A (S.A)
TV
24m
My Little Monster
TV
24m
Towanoquon: The Return of the Invincible
Movie
48m
World Trigger
TV
23m
Useless Witch Doremi Kaboom!
TV
24m
Digimon: The Movie
Movie
20m
Planetarian
ONA
18m
Psycho-Pass 3
TV
45m
Sarazanmai
TV
22m
Tokyo Ravens
TV
23m
Deca-Dence
TV
23m
Dragon Ball Z: Fusion Reborn
Movie
55m
The Morose Mononokean II
TV
23m