Although Saitama may not strike anyone as particularly remarkable, his heart beats with an uncontainable passion to serve as a hero. He pushed himself relentlessly for three years, sacrificing every last strand of hair along the way, in a determined pursuit of his childhood dream. Now, he boasts the unfathomable power to obliterate any adversary with a solitary punch, yet feels restless due to the monotony that such incredible abilities bring. Saitama yearns for a worthy challenger to test his limits. Alas, his wish is granted when a 19-year-old cyborg known as Genos recognizes Saitama's prowess and begs to learn from him. Genos encourages him to join the Hero Association, where they can earn acclaim for their life-saving actions. Inspired, Saitama agrees. Once enrolled, he faces new allies and opponents that reignite his passion for fighting and the exhilaration it brings. Despite his incredible strength, he realizes that the journey to become a certified hero is merely the beginning.