ONE-Sensei wrote the original and was illustrated by Murata Yuusuke-Sensei later on. At first, it used to be a webcomic, serialized only on ONE’s website but it started being serialized by Murata Yuusuke-Sensei in “Tonari no Young Jump.” Murata Yuusuke-Sensei is such a famous illustrator that he has started serializing Eyeshield 21 . His works have been made into anime and a game as well.

The main character, Saitama, was doing a job hunting, looking almost dying.

Wherever he went, he never got hired. He never passed the interviews. Struggled with such a tough reality, Saitama was still trying hard on the job hunting.

One day, he saved a boy whose chin was like a butt, from the crab-like monster.

Saitama, who was desperate trying to save the boy, somehow remembered that his dream in his childhood was a Hero, beating villains.

Saitama, who beat the monster, started having a tough training to become the Hero, and it lasted three years.

As a result, he went bald.

However, Saitama acquired the power, where he could knock down any monsters by One-Pun (one punch, knocked out). But at the same time, he also felt in vain because he can knock down anybody that easily……

So! This is a story of such a powerful chara, Saitama, and the Heroes and villains, surrounding him. That’s the One-Punch Man!