Saitama is a hero who initially pursued heroism as a hobby. However, after undergoing an intense three-year training regimen, he has reached a level of strength that makes him nearly unbeatable. His power is so overwhelming that he can defeat even the toughest adversaries with just one punch, leading to an unexpected downside: the monotony of being too powerful. As he battles new foes daily, Saitama finds his enthusiasm for heroics waning, along with his hair. The question remains: how much longer can he continue this path?