One-Punch Man

To combat the monsters and villains that are wreaking havoc on the planet, the world’s government created a Hero Association that employs superheroes to fight them. The ranking of these heroes goes from Class C to Class S. Saitama, a hero, but not a member of the Association, arrives from the metropolis of City-Z and performs heroic deeds. He has trained himself to the point where he broke his “limit” and can effortlessly defeat any opponent with a single punch. Over the course of the series, Saitama encounters different superheroes, villains, and monsters. He becomes the mentor to cyborg Genos, who wants revenge against another cyborg that slaughtered his entire family. Eventually, the pair joins the Hero Association to gain recognition.