Punch

Saitama is a young man who is unemployed, depressed and aimless in his life. One day, he meets a crab man looking for a pretty boy. Saitama ends up meeting him and decides to save him from this man, whom he manages to beat hard. From then on, he decided to become a superhero and trained for three years very seriously. At the end of his training "so intense that he loses his hair," no one seems to notice the incredible ability of Saitana, except for his friend and disciple Genos, a modified man who became a cyborg.