One-Punch Man is a Japanese superhero webcomic, manga, and anime series. It tells the story of Saitama, a seemingly average guy who has trained himself to be the strongest man on Earth. He is able to defeat any opponent with a single punch, hence the name of the series.

Saitama is often bored and frustrated with his lack of challenges, but he continues to fight villains and monsters in order to protect his city. He is joined by other heroes, each with their own unique abilities and personalities, as they work together to save the world from various threats.

The series is known for its humor and parody of the superhero genre, as well as its over-the-top action scenes. It has gained a large following in Japan and around the world, spawning merchandise, video games, and a live-action adaptation.

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