Let's look at One Punch Man

One Punch Man is set in a fictional world that is constantly being attacked by various monsters, supervillains, and otherworldly beings. The world consists of several large cities that are named after letters of the alphabet, ranging from City A to City Z. These cities are spread across different terrains like deserts, grasslands, mountains, and coastal areas.

This world is inhabited by both ordinary humans and a wide range of powerful superheroes who possess unique skills, abilities, and equipment. The superheroes protect the citizens from evil threats and maintain peace and order in the cities. These heroes are ranked by the Hero Association, an organization in charge of evaluating, training, and supporting the heroes as they battle various foes.

Superheroes are classified into four levels, C-Class, B-Class, A-Class, and S-Class, with S-Class being the strongest and C-Class being the weakest. Each rank has its own set of challenges and requirements for the heroes to meet and maintain.

In this world, mysterious beings and monsters appear in various forms, threatening the safety of the citizens or the planet as a whole. Some monsters are created from human or animal mutations, while others are alien in origin. These monsters have different degrees of strength and intelligence, requiring the collective efforts of superheroes to defeat them.

The central character, Saitama, is an average and bald man who happens to be the world's most powerful hero. With extraordinary strength, speed, and endurance, he can defeat any enemy with just a single punch, hence the name "One Punch Man." However, his overwhelming power has left him bored and continuously searching for an opponent who can challenge him.

As Saitama embarks on various adventures and battles, he encounters numerous heroes and villains, including Genos, a powerful cyborg seeking **** against a robot that destroyed his village; and Speed-o'-Sound Sonic, a ninja who becomes Saitama's self-proclaimed rival. Throughout the series, the characters explore themes such as justice, heroism, existentialism, and the consequences of having seemingly limitless power.

Overall, the world of One Punch Man is a unique universe filled with action, humor, and intriguing characters, touching on themes related to humanity, heroism, and the pursuit of purpose in a world that both admires and fears strength.