Summary by cleofe maliga
In the fictional Metropolis of Japan in the City Z, there was a man also known as the One Punch Man. In this world where there are various kinds of strange monsters that appear and cause disasters, Saitama alone can handle them. He is a super powerful hero that can easily defeat his opponents, monsters or villains with no effort at all except for only the one punch that he gave them. He soon got bored of his strength and now constantly searching for powerful opponents to fight with. After all what's the use of all his rigorous training, if he can defeat anyone in one punch? Its as if the training wasn't worth the victory, so he goes on adventures.
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