Chapter 1 introduces the world of One Punch Man and its main character — a bald, unassuming man named Saitama who possesses unimaginable strength. The story begins with a city under threat from a menacing villain known as Mosquito Girl, who terrorizes the area with deadly swarms of mosquitoes. Genos, a powerful cyborg, steps in to fight her but is swiftly defeated.

Just when it seems all hope is lost, Saitama appears effortlessly and defeats Mosquito Girl and her entire swarm with a single punch. Genos, witnessing Saitama’s overwhelming power, is astonished and immediately requests to become his disciple.

Thus begins the story of Saitama — the world’s mightiest hero, whose incredible strength and humble demeanor mark the start of an unforgettable journey