The Hero Association is an organization that brings together various heroes to protect society from threats and villains. It ranks heroes based on their abilities and achievements, allowing them to earn recognition and rewards. This system helps citizens identify the strongest heroes, like Saitama and Genos, who are ready to fight for justice. Members of the Hero Association undergo rigorous training and often face dangerous challenges. They work together to combat powerful foes, such as Monster Association and other evil entities. The association not only promotes heroism but also fosters teamwork and camaraderie among its members, creating a safer world for everyone.