Life gets pretty boring when you can beat the snot out of any villain with just one punch.
Saitama was a young worker at 22 who lost his taste for life. One morning when he went to a job interview, he was rejected. Finding himself unemployed, he wandered the streets. He then met Crabotaur that same day, a once human monster who ate too much crab. He was surprised that there was only one person who did not run away from him. His appearance made him think he was coming home from work and his demeanor that he was tired of life. Saitama replied that he was right, except on one point: he was unemployed. Then he explained his situation to her. Finally, Crabotaur spared him because he recognized that emptiness in his eyes. The monster leaves saying he was looking for a kid with a slit chin like an ass anyway.
One-Punch Man (Japanese: ワンパンマン, Hepburn: Wanpanman) is a Japanese superhero franchise created by the artist ONE. It tells the story of Saitama, a superhero who can defeat any opponent with a single punch but seeks to find a worthy opponent after growing bored by a lack of challenge due to his overwhelming strength. ONE wrote the original webcomic version in early 2009 Discover the story of the most powerful superhero in this manga that will knock you out !! Saitama is a young man with no job and no real prospects for the future, until the day he decides to take charge of his life. His new goal: to become a superhero. He then trained tirelessly for three years and became so powerful that he was able to eliminate his opponents with one punch. He is now nicknamed One-Punch Man. But quickly, the euphoria of success gives way to boredom, because when you are so strong, victories lose their flavor.