"B-Class Hero" refers to a classification within the world of the popular manga and anime series, One Punch Man. In this universe, heroes are ranked based on their abilities and accomplishments, with B-Class being a mid-tier level. B-Class heroes often take on various missions to protect the public from monsters and villains, showcasing their skills and bravery. These heroes are typically less powerful than A-Class and S-Class heroes but still play a crucial role in maintaining safety. They often face challenges that require teamwork and strategy, highlighting their dedication to heroism despite not being the top-ranked fighters in the Hero Association.