Episodes
One Punch Man is too strong and growing tired of his weak enemies. Will he ever be faced with a real challenge?
Genos, a Cyborg who is seeking Justice fights with a Mosquito Monster along with Saitama.
Saitama and Genos track down an evil scientist who wants to know the secret to Saitama's power.
A group of Bald thugs use body armors to torrorize rich people. Sonic Speed, a hired ninja fights them. Unfortunately he meets ...read more A group of Bald thugs use body armors to torrorize rich people. Sonic Speed, a hired ninja fights them. Unfortunately he meets with Saitama who is also a Bald. show less
Saitama and Genos find out about the hero registration and both took the tests to certify. Genos got "S(Special)" and ...read more Saitama and Genos find out about the hero registration and both took the tests to certify. Genos got "S(Special)" and Saitama got "C" grade. Meanwhile, Genos became the disciple of Saitama and learned about the power of saitama's punch on a training session. show less
To remain on the "Hero" list Saitama has to show some activity in every week. Currently the City Z is defined as the ...read more To remain on the "Hero" list Saitama has to show some activity in every week. Currently the City Z is defined as the 'ghost town'. Heroes are gathered together to find out whats going on. show less
A giant meteor threatens to destroy City Z. All S-Rank heroes are called to City Z to destroy the meteor before its collision.
Several Sea Folk appear and begin attacking citizens. They are easily defeated until The Deep Sea King appears and defeats many ...read more Several Sea Folk appear and begin attacking citizens. They are easily defeated until The Deep Sea King appears and defeats many heroes including an S-Class. show less
The fight with the Deep Sea King concludes and Saitama and Genos reflect on it as well as Saitama's promotion to B-Class.
Saitama and all class S heroes are gathered together to be informed of an imminent extremely danger threat.
An alien conqueror lands in a spaceship to conquer the Earth during the S class heroes meeting.
Saitama takes on the alien leader in epic battle as the S class heroes fight the alien warriors and destroy the spaceship.